WO2024069851A1 - Measurement accuracy management system, management device, management method, management program, and charging/discharging device - Google Patents

Measurement accuracy management system, management device, management method, management program, and charging/discharging device Download PDF

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Publication number
WO2024069851A1
WO2024069851A1 PCT/JP2022/036440 JP2022036440W WO2024069851A1 WO 2024069851 A1 WO2024069851 A1 WO 2024069851A1 JP 2022036440 W JP2022036440 W JP 2022036440W WO 2024069851 A1 WO2024069851 A1 WO 2024069851A1
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WIPO (PCT)
Prior art keywords
power
measurement
unit
value
calibration
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PCT/JP2022/036440
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French (fr)
Japanese (ja)
Inventor
碧 畑中
将義 廣田
Original Assignee
住友電気工業株式会社
住友電装株式会社
株式会社オートネットワーク技術研究所
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Application filed by 住友電気工業株式会社, 住友電装株式会社, 株式会社オートネットワーク技術研究所 filed Critical 住友電気工業株式会社
Priority to PCT/JP2022/036440 priority Critical patent/WO2024069851A1/en
Publication of WO2024069851A1 publication Critical patent/WO2024069851A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
    • G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods

Definitions

  • This disclosure relates to a measurement accuracy management system, a management device, a management method, a management program, and a charge/discharge device.
  • Patent Document 1 discloses an equipment management system in which equipment in a home, such as a gas water heater, electric water heater, or air conditioner, detects the operating characteristic values of the equipment and determines the equipment failure risk based on the detected operating characteristic values, an equipment management server generates a failure prediction time for the equipment to fail based on the failure risk, and the probability that the equipment will fail by the predicted failure time, and an input/output device installed in the home displays the predicted failure time and the probability of the equipment failing.
  • equipment in a home such as a gas water heater, electric water heater, or air conditioner
  • a measurement accuracy management system includes a charge/discharge device that charges and discharges a battery through an electrical wiring connected to a power grid, a management device that manages the power used by a load connected to the electrical wiring and the charging/discharging power of the charge/discharge device, and a reference measurement unit that measures the power in the electrical wiring.
  • the charge/discharge device includes a target measurement unit that measures the charging/discharging power of the battery
  • the management device includes a first acquisition unit that acquires a reference measurement value that is a measurement value of the power by the reference measurement unit, and a second acquisition unit that acquires a target measurement value that is a measurement value of the charging/discharging power of the battery by the target measurement unit.
  • the measurement accuracy management system includes a determination unit that determines whether or not it is necessary to perform calibration of the target measurement unit based on the reference measurement value acquired by the first acquisition unit and the target measurement value acquired by the second acquisition unit, and an instruction unit that transmits instruction information to perform the calibration when it is determined by the determination unit that it is necessary to perform calibration of the target measurement unit.
  • the charge/discharge device includes a calibration execution unit that executes calibration of the target measurement unit based on the instruction information transmitted from the instruction unit.
  • the present disclosure can be realized not only as a measurement accuracy control system having the characteristic configuration described above, but also as a management device included in the measurement accuracy control system, or as a management method having steps corresponding to characteristic processes in the management device.
  • the present disclosure can be realized as a computer program that causes a computer to function as a management device, or as a semiconductor integrated circuit as part or all of the management device, or as a charge/discharge device included in the measurement accuracy control system.
  • FIG. 1 is a diagram showing an example of the overall configuration of a measurement accuracy control system according to an embodiment.
  • FIG. 2 is a block diagram illustrating an example of a configuration of a power conversion device according to an embodiment.
  • FIG. 3 is a block diagram illustrating an example of a hardware configuration of the charging/discharging device according to the embodiment.
  • FIG. 4 is a circuit diagram showing an example of the configuration of a power conversion circuit in a charge/discharge device.
  • FIG. 5 is a block diagram illustrating an example of a hardware configuration of a management device according to an embodiment.
  • FIG. 6 is a functional block diagram showing an example of functions of a measurement accuracy management system according to an embodiment.
  • FIG. 7 is a diagram showing an example of the notification screen.
  • FIG. 8 is a sequence diagram showing an example of the operation of the entire measurement accuracy control system according to the embodiment.
  • FIG. 9 is a flowchart illustrating an example of a process of the management device according to the embodiment.
  • the accuracy of power measurement in a charge/discharge device can be managed.
  • the measurement accuracy management system includes a charge/discharge device that charges and discharges a battery through an electrical wiring connected to a power grid, a management device that manages the power usage of a load connected to the electrical wiring and the charging/discharging power by the charge/discharge device, and a reference measurement unit that measures the power in the electrical wiring, wherein the charge/discharge device includes a target measurement unit that measures the charging/discharging power of the battery, and the management device includes a first acquisition unit that acquires a reference measurement value that is a measurement value of the power by the reference measurement unit, and a second acquisition unit that acquires a target measurement value that is a measurement value of the charging/discharging power of the battery by the target measurement unit, and the measurement accuracy management system includes a determination unit that determines whether or not it is necessary to perform calibration of the target measurement unit based on the reference measurement value acquired by the first acquisition unit and the target measurement value acquired by the second acquisition unit, and an instruction unit that transmits instruction information to perform the calibration when it
  • Power is determined by voltage and current.
  • the power value is calculated from the voltage value and the current value.
  • the "power measurement value” here includes not only the power measurement value itself, but also a combination of the voltage measurement value and the current measurement value.
  • the reference measurement unit may include a reference voltage sensor that measures the voltage in the electrical wiring and a reference current sensor that measures the current in the electrical wiring
  • the target measurement unit may include a target voltage sensor that measures the charge/discharge voltage of the battery and a target current sensor that measures the charge/discharge current of the battery
  • the determination unit may execute a first determination process to determine whether or not calibration of the target measurement unit is required based on a reference voltage value that is a voltage value measured by the reference voltage sensor and a target voltage value that is a voltage value measured by the target voltage sensor, and a second determination process to determine whether or not calibration of the target measurement unit is required based on a reference current value that is a current value measured by the reference current sensor and a target current value that is a current value measured by the target current sensor. This allows the accuracy of the measurement values of the target voltage sensor and the target current sensor to be managed.
  • the instruction information may include a calibration voltage value based on a voltage value measured by the reference voltage sensor and a calibration current value based on a current value measured by the reference current sensor, and the calibration execution unit may calibrate the target voltage sensor based on the calibration voltage value and calibrate the target current sensor based on the calibration current value. In this way, by calibrating the target voltage sensor and the target current sensor, respectively, it is possible to suppress a decrease in the measurement accuracy of the target voltage sensor and the target current sensor.
  • the reference measurement value may be a measurement value of the power supplied from the grid power source or the power flowing back to the grid power source. This makes it possible to determine whether calibration of the target measurement unit is required based on the measurement value of the power supplied from the grid power source or the backflow power.
  • the reference measurement unit may be a smart meter. This makes it possible to determine whether or not calibration of the target measurement unit is required using a smart meter with high measurement accuracy.
  • the measurement accuracy management system may further include a calculation unit that calculates a charge/discharge power value charged or discharged by the charge/discharge device based on the power consumption value of the load connected to the electrical wiring and the reference measurement value, and the determination unit may determine whether or not calibration of the target measurement unit is required based on a comparison between the charge/discharge power value calculated by the calculation unit and the target measurement value. This makes it possible to determine whether or not calibration of the target measurement unit is required using an accurate charge/discharge power value calculated based on the measurement value of the supply power or reverse flow power from the grid power source and the power consumption value of the load.
  • the power usage value of the load may be selected from a plurality of statistical values of the power usage value of the load calculated for each time of the year.
  • the power usage value of the load varies depending on the time of the year. Therefore, the selected statistical value can be used to accurately calculate the charging/discharging power value of the charging/discharging device.
  • the power usage value of the load may be the power usage value of the load in a specific time period in one day
  • the first acquisition unit may acquire the reference measurement value measured by the reference measurement unit in the specific time period
  • the second acquisition unit may acquire the target measurement value measured by the target measurement unit in the specific time period. This makes it possible to accurately determine whether calibration of the target measurement unit is required using the reference measurement value and the target measurement value measured in the specific time period.
  • the specific time period may be nighttime. Since the load uses less power at night, it is possible to more accurately determine whether calibration of the target measurement unit is required.
  • the electrical wiring may be connected to a power converter that converts power generated by a generator, and the determination unit may calculate the charge/discharge power value further based on the output power value from the power converter. This makes it possible to accurately determine whether calibration of the target measurement unit is required, even in a house equipped with a generator.
  • the charging/discharging device may include a charging/discharging control unit that charges or discharges the battery in a specific pattern, and the second acquisition unit may acquire the target measurement value, which is a measurement value of the charging/discharging power of the battery by the target measurement unit when the battery is charged or discharged in the specific pattern. This makes it possible to accurately determine whether or not calibration of the target measurement unit is required by using a pattern suitable for checking the measurement accuracy of the target measurement unit.
  • the management device may include an output unit that outputs notification information for notifying a user that the calibration has been performed when the charging/discharging device performs calibration of the target measurement unit. This notifies the user that the calibration has been performed, and the user can know that the accuracy of the power measurement in the target measurement unit of the charging/discharging device is being managed.
  • the management device may include the determination unit and the instruction unit. This allows the management device to determine whether calibration of the target measurement unit is required.
  • the charging/discharging device may include the determination unit and the instruction unit. This allows the charging/discharging device to determine whether calibration of the target measurement unit is required.
  • the battery may be an on-board battery mounted on an electric vehicle. This makes it possible to manage the accuracy of power measurement in a charging/discharging device for the on-board battery of the electric vehicle.
  • the management device is a management device that manages the power consumption of a load connected to an electrical wiring connected to a system power supply and the charging/discharging power of a charging/discharging device that charges and discharges a battery through the electrical wiring, and includes a first acquisition unit that acquires a reference measurement value that is a measurement value of power by a reference measurement unit that measures the power in the electrical wiring, a second acquisition unit that acquires a target measurement value that is a measurement value of the charging/discharging power of the battery by a target measurement unit that measures the charging/discharging power in the charging/discharging device, a determination unit that determines whether or not it is necessary to perform calibration of the target measurement unit based on the reference measurement value acquired by the first acquisition unit and the target measurement value acquired by the second acquisition unit, and an instruction unit that transmits instruction information to perform the calibration when it is determined by the determination unit that it is necessary to perform calibration of the target measurement unit.
  • the management method is a management method used by a management device that manages the power consumption of a load connected to an electrical wiring connected to a system power supply and the charging/discharging power of a charging/discharging device that charges and discharges a battery through the electrical wiring, and includes the steps of acquiring a reference measurement value that is a measurement value of power by a reference measurement unit that measures the power in the electrical wiring, acquiring a target measurement value that is a measurement value of the charging/discharging power of the battery by a target measurement unit that measures the charging/discharging power in the charging/discharging device, determining whether or not it is necessary to perform calibration of the target measurement unit based on the acquired reference measurement value and the acquired target measurement value, and transmitting instruction information that instructs the execution of the calibration when it is determined that it is necessary to perform calibration of the target measurement unit.
  • the management program according to this embodiment is a management program used by a management device that manages the power consumption of a load connected to an electrical wiring connected to a system power supply and the charging/discharging power of a charging/discharging device that charges and discharges a battery through the electrical wiring, and causes a computer to execute the steps of: acquiring a reference measurement value that is a measurement value of power by a reference measurement unit that measures the power in the electrical wiring; acquiring a target measurement value that is a measurement value of the charging/discharging power of the battery by a target measurement unit that measures the charging/discharging power in the charging/discharging device; determining whether or not it is necessary to perform calibration of the target measurement unit based on the acquired reference measurement value and the acquired target measurement value; and transmitting instruction information that instructs the execution of the calibration when it is determined that it is necessary to perform calibration of the target measurement unit.
  • the charge/discharge device is a charge/discharge device that charges and discharges a battery through an electrical wiring connected to a system power supply, and includes a target measurement unit that measures the charging/discharging power of the battery, and a calibration execution unit that executes calibration of the target measurement unit based on a determination result of whether or not calibration of the target measurement unit is required based on a reference measurement value that is a measurement value of power by a reference measurement unit that measures power in the electrical wiring, and a target measurement value that is a measurement value of the charging/discharging power of the battery by the target measurement unit.
  • Measurement accuracy control system 1 is a diagram showing an example of the overall configuration of a measurement accuracy management system according to an embodiment.
  • the measurement accuracy management system 10 manages the accuracy of power measurement of a charge/discharge device 30 for an on-board battery of an electric vehicle 40 that is propelled by the power of a motor, such as an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle.
  • the measurement accuracy management system 10 is provided in a house 11.
  • the measurement accuracy management system 10 includes the charge/discharge device 30, a management device 100, and a smart meter 50.
  • the charging/discharging device 30 is connected to electrical wiring 20 installed in the house 11.
  • the electrical wiring 20 is connected to a power grid and transmits AC power supplied from the power grid.
  • the electrical wiring 20 includes multiple ends, one of which extends to the outside of the house 11.
  • a connector 21 is provided at the end outside the house 11.
  • the charging/discharging device 30 can be connected to the connector 21. More specifically, a plug 31 provided on the charging/discharging device 30 can be inserted into the connector 21.
  • the charging/discharging device 30 has a plug 32 for connecting to the electric vehicle 40.
  • the plug 32 can be inserted into an inlet provided on the electric vehicle 40.
  • the charging/discharging device 30 can charge and discharge the on-board battery of the electric vehicle 40.
  • the charging/discharging device 30 has a wireless communication function and is capable of wireless communication.
  • the electrical wiring 20 is connected to a power line 23 via a distribution board 22.
  • the power line 23 is connected to a system power supply.
  • the electrical wiring 20 branches out at the distribution board 22.
  • Loads 60 that consume electricity such as televisions, refrigerators, washing machines, lighting, and air conditioners, are connected to the electrical wiring 20.
  • the distribution board 22 is provided with power measurement units 221 and 222.
  • the power measurement unit 221 is attached to a power line extending to the connector 21 to which the charging/discharging device 30 is connected.
  • the power measurement unit 221 includes a voltage sensor 221V and a current sensor 221A.
  • the power measurement unit 221 measures the power supplied to the charging/discharging device 30 or the power output from the charging/discharging device 30. That is, the power measurement unit 221 measures the charging/discharging power by the charging/discharging device 30. More specifically, the voltage sensor 221V measures the charging/discharging voltage by the charging/discharging device 30, and the current sensor 221A measures the charging/discharging current by the charging/discharging device 30.
  • the charging/discharging power is calculated based on the voltage value measured by the voltage sensor 221V and the current value measured by the current sensor 221A.
  • the charging/discharging power is calculated, for example, by a processor (not shown) provided in the power measurement unit 221.
  • the power measurement unit 222 is attached to a power line extending to the load 60.
  • the power measurement unit 222 includes a voltage sensor 222V and a current sensor 222A.
  • the power measurement unit 222 measures the power supplied to the load 60. That is, the power measurement unit 222 measures the power used by the load 60. More specifically, the voltage sensor 222V measures the voltage applied to the load 60 (hereinafter also referred to as the "load voltage"), and the current sensor 222A measures the current supplied to the load 60 (hereinafter also referred to as the "load current").
  • the power used by the load 60 is calculated based on the voltage value measured by the voltage sensor 222V and the current value measured by the current sensor 222A. For example, the power value is calculated by the voltage value x current value x power factor (phase difference between the current and the voltage).
  • the calculation of the power used is performed, for example, by a processor (not shown) provided in the power measurement unit 222.
  • a solar power generation device 70 is placed in the house 11.
  • the solar power generation device 70 is placed in a position where it can receive sunlight during the day, such as on the roof.
  • the power generated by the solar power generation device 70 is stored in a battery 80.
  • the solar power generation device 70 and the battery 80 are connected to a power conversion device 90.
  • the power conversion device 90 can convert the voltage of the DC power output from the solar power generation device 70 and output DC power of a predetermined voltage.
  • the output power from the power conversion device 90 is supplied to the battery 80, which charges the battery 80.
  • the power conversion device 90 is connected to the electrical wiring 20.
  • the power conversion device 90 can convert the DC power discharged from the battery 80 and output it to the electrical wiring 20. Furthermore, during times when the solar power generation device 70 is not generating power, such as at night, the power conversion device 90 can convert the AC power supplied from the system power supply into DC power and charge the battery 80.
  • a smart meter 50 is attached to the power line 23 connected to the system power supply.
  • the smart meter 50 is a power measurement device with a communication function.
  • the smart meter 50 includes a power measurement unit 51 and a wireless communication unit 52.
  • the power measurement unit 51 measures the power on the power line 23.
  • the power measurement unit 51 is an example of a "reference measurement unit.”
  • the power measurement unit 51 includes a voltage sensor 51V and a current sensor 51A.
  • the voltage sensor 51V measures the voltage on the power line 23.
  • the voltage sensor 51V is an example of a "reference voltage sensor.”
  • the current sensor 51A measures the current on the power line 23.
  • the current sensor 51A is an example of a "reference current sensor.” Power is calculated based on the voltage value measured by the voltage sensor 51V and the current value measured by the current sensor 51A. For example, the power value is calculated by voltage value x current value x power factor.
  • the power is calculated, for example, by a processor (not shown) provided in the power measurement unit 51.
  • the wireless communication unit 52 is, for example, a communication interface for a wireless LAN (Local Area Network) that complies with the wireless communication standard IEEE802.11.
  • the smart meter 50 can wirelessly transmit reference measurement information including the voltage value and current value measured by the voltage sensor 51V and the current sensor 51A via the wireless communication unit 52.
  • the management device 100 is connected to a wireless communication device 200.
  • the wireless communication device 200 is, for example, a communication device that complies with IEEE802.11.
  • the wireless communication device 200 is, for example, a wireless LAN access point, and can perform wireless communication with the smart meter 50 and the charging/discharging device 30.
  • the wireless communication device 200 has a function as a router, and can also communicate with servers on the Internet, etc.
  • the management device 100 and the wireless communication device 200 can perform, for example, wireless communication or wired communication.
  • the wireless communication device 200 includes an Ethernet (registered trademark) interface and can communicate with the management device 100 using a communication protocol such as TCP/IP (Transmission Control Protocol/Internet Protocol).
  • TCP/IP Transmission Control Protocol/Internet Protocol
  • the wireless communication device 200 relays communication between the management device 100 and the smart meter 50 and the charging/discharging device 30.
  • the management device 100 manages the power used by the load 60 connected to the electrical wiring 20 and the power charged and discharged by the charge/discharge device 30.
  • the management device 100 is a Home Energy Management System (HEMS) controller.
  • HEMS Home Energy Management System
  • the management device 100 can also manage the power generated by the solar power generation device 70 and the power stored in the battery 80.
  • FIG. 2 is a block diagram showing an example of the configuration of a power conversion device according to an embodiment.
  • the management device 100 is connected to the power conversion device 90 via a signal line and controls the power conversion device 90. By controlling the power conversion device 90, the management device 100 can perform the following energy management.
  • the power conversion device 90 includes a step-up DC/DC converter 91, a bidirectional AC/DC converter 92, and a bidirectional DC/DC converter 93.
  • the step-up DC/DC converter 91 is connected to the solar power generation device 70 via a power line, boosts the DC power input from the solar power generation device 70, and outputs the boosted DC power.
  • the output power from the step-up DC/DC converter 91 is input to the bidirectional DC/DC converter 93.
  • the bidirectional DC/DC converter 93 converts the voltage of the input DC power.
  • the bidirectional DC/DC converter 93 is connected to the battery 80 by a power line, and outputs the voltage-converted DC power to the battery 80, thereby charging the battery 80.
  • the management device 100 controls the power conversion device 90 and charges the battery 80 with the electricity generated by the solar power generation device 70 during the day.
  • the bidirectional AC/DC converter 92 is connected to the electrical wiring 20, and AC power from the system power supply can be input from the electrical wiring 20.
  • the bidirectional AC/DC converter 92 converts the input AC power into DC power.
  • the converted DC power is input from the bidirectional AC/DC converter 92 to the bidirectional DC/DC converter 93.
  • the bidirectional DC/DC converter 93 converts the voltage of the DC power input from the bidirectional AC/DC converter 92, and outputs the voltage-converted DC power to the battery 80, thereby charging the battery 80.
  • the management device 100 can control the power conversion device 90 and store the power supplied from the grid power supply in the battery 80 during times when power generation by the solar power generation device 70 is not suitable, such as at night or during bad weather.
  • the power conversion device 90 can discharge the battery 80.
  • the bidirectional DC/DC converter 93 converts the DC power output from the battery 80, and outputs the voltage-converted DC power to the bidirectional AC/DC converter 92.
  • the bidirectional AC/DC converter 92 converts the input DC power to AC power, and outputs the AC power to the electrical wiring 20.
  • the management device 100 can reverse-flow a portion of the power stored in the battery 80 from the electrical wiring 20 to the system power supply.
  • the battery 80 is used in the house 11. For example, instead of power from a power grid, the power stored in the battery 80 can be supplied to the load 60 via the electrical wiring 20, or to the charging/discharging device 30 to charge the electric vehicle 40.
  • the management device 100 is placed in the house 11.
  • the management device 100 is operated by a user who is, for example, a resident of the house 11.
  • the management device 100 includes an input device and a display device. The administrator can input information into the management device 100 using the input device and monitor the power operation status of the entire house 11 using the display device.
  • the charging and discharging device 30 is a block diagram showing an example of a hardware configuration of the charging/discharging device according to the embodiment.
  • the charging/discharging device 30 includes a power conversion circuit 301, a control circuit 302, and a communication interface (communication I/F) 303. and a wireless communication I/F 304.
  • the power conversion circuit 301 is connected to the plug 31 via a power line.
  • the plug 31 can be connected to the connector 21.
  • the power conversion circuit 301 is connected to the plug 32 via a power line.
  • the plug 32 can be connected to the electric vehicle 40.
  • the electric vehicle 40 includes an on-board battery 401, an on-board control device 402, and an inlet 403.
  • the on-board battery 401 is a drive motor that supplies power to a motor (not shown) for propelling the electric vehicle 40.
  • the on-board control device 402 together with the charge/discharge device 30, can control the charging and discharging of the on-board battery 401. That is, the on-board control device 402 communicates with the control circuit 302 of the charge/discharge device 30 and performs charging and discharging of the on-board battery 401.
  • the inlet 403 includes a socket (not shown) that can be connected to the plug 32.
  • the inlet 403 is connected to the vehicle battery 401 by a power line.
  • the inlet 403 is connected to the vehicle control device 402 by a communication line.
  • FIG. 4 is a circuit diagram showing an example of the configuration of a power conversion circuit in a charging/discharging device.
  • the power conversion circuit 301 includes a bidirectional AC/DC converter 311, a bidirectional AC/DC converter 312, a bidirectional AC/DC converter 313, a transformer 314, and a power measurement unit 33.
  • the bidirectional AC/DC converter 311 is connected to a power line extending from the plug 31.
  • the bidirectional AC/DC converter 311 is connected to the bidirectional AC/DC converter 312.
  • the bidirectional AC/DC converter 312 and the bidirectional AC/DC converter 313 are connected via a transformer 314.
  • the bidirectional AC/DC converter 313 is connected to a power line extending from the plug 32.
  • Each of the bidirectional AC/DC converters 311, 312, and 313 is, for example, a full-bridge circuit including multiple (four) switching elements.
  • the switching elements are, for example, power semiconductor elements such as IGBTs (insulated gate bipolar transistors) and power MOSFETs (metal-oxide-semiconductor field effect transistors).
  • the power conversion circuit 301 converts the AC power input from the plug 31 into DC power and outputs the DC power to the plug 32.
  • the bidirectional AC/DC converter 311 functions as a rectifying and smoothing circuit, and converts the input AC power into DC power.
  • the bidirectional AC/DC converter 312 functions as a DC/AC converter, and converts the DC power into AC power by switching operations.
  • the transformer 314 converts the voltage of the AC power.
  • the bidirectional AC/DC converter 313 functions as a rectifying and smoothing circuit, and converts the AC power after voltage conversion into DC power.
  • the power conversion circuit 301 converts the DC power input from the plug 32 into AC power and outputs the AC power to the plug 31.
  • the bidirectional AC/DC converter 313 functions as a DC/AC converter and converts the DC power into AC power by switching operations.
  • the transformer 314 converts the voltage of the AC power.
  • the bidirectional AC/DC converter 312 functions as a rectifying and smoothing circuit and converts the AC power after voltage conversion into DC power.
  • the bidirectional AC/DC converter 313 functions as a DC/AC converter and converts the DC power into AC power by switching operations.
  • the power measurement unit 33 is attached to the power line extending from the bidirectional AC/DC converter 311 to the plug 31.
  • the power measurement unit 33 measures the power supplied to the charge/discharge device 30 through the plug 31 or the power output from the charge/discharge device 30. In other words, the power measurement unit 33 measures the charging/discharging power by the charge/discharge device 30.
  • the power measurement unit 33 is an example of a "target measurement unit.”
  • the power measurement unit 33 includes a voltage sensor 33V and a current sensor 33A.
  • the voltage sensor 33V measures the charging/discharging voltage of the charging/discharging device 30.
  • the voltage sensor 33V is an example of a "target voltage sensor.”
  • the current sensor 33A measures the charging/discharging current of the charging/discharging device 30.
  • the current sensor 33A is an example of a "target current sensor.”
  • the charging/discharging power is calculated based on the voltage value measured by the voltage sensor 33V and the current value measured by the current sensor 33A.
  • the power value is calculated by voltage value x current value x power factor.
  • the charging/discharging power is calculated, for example, by a processor or control circuit 302 (not shown) provided in the power measurement unit 33.
  • control circuit 302 is connected to the power conversion circuit 301.
  • the control circuit 302 is composed of, for example, a processor, a memory, etc.
  • the control circuit 302 controls the switching operation of the power conversion circuit 301, thereby allowing the power conversion circuit 301 to selectively perform a charging function and a discharging function.
  • the communication I/F 303 is connected to a communication line extending from the plug 32.
  • the communication I/F 303 is connected to the vehicle control device 402 via a communication line.
  • the communication I/F 303 is used for communication with the vehicle control device 402.
  • the communication I/F 303 can communicate using a specific communication protocol, for example, CAN (Controller Area Network).
  • the wireless communication I/F 304 is used for communication with the charge/discharge management device 100.
  • the wireless communication I/F 304 is, for example, a communication interface that complies with IEEE802.11.
  • the wireless communication I/F 304 can communicate using a specific communication protocol, for example TCP/IP.
  • Hardware configuration of management device 5 is a block diagram showing an example of a hardware configuration of a management device according to an embodiment.
  • the management device 100 includes a processor 101, a non-volatile memory 102, a volatile memory 103, an input device 104, a display device 105, and a communication I/F 106.
  • the volatile memory 103 is, for example, a semiconductor memory such as SRAM (Static Random Access Memory) or DRAM (Dynamic Random Access Memory).
  • the non-volatile memory 102 is, for example, a flash memory, a hard disk, or a ROM (Read Only Memory).
  • the non-volatile memory 102 stores a management program 110, which is a computer program, and data used to execute the management program 110. Each function of the management device 100 is achieved by the processor 101 executing the management program 110.
  • the management program 110 can be stored in a recording medium such as a flash memory, a ROM, or a CD-ROM.
  • the processor 101 manages the accuracy of power measurement by the power measurement unit 33 of the charging/discharging device 30 using the management program 110.
  • the processor 101 is, for example, a CPU (Central Processing Unit). However, the processor 101 is not limited to a CPU.
  • the processor 101 may be a GPU (Graphics Processing Unit).
  • the processor 101 is, for example, a multi-core processor.
  • the processor 101 may be a single-core processor.
  • the processor 101 may be, for example, an ASIC (Application Specific Integrated Circuit), or a programmable logic device such as a gate array or an FPGA (Field Programmable Gate Array). In this case, the ASIC or programmable logic device is configured to be capable of executing the same processing as the management program 110.
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the non-volatile memory 102 is provided with a statistical database (hereinafter, "statistical DB") 111.
  • the statistical DB 111 stores statistical values of power usage in the house 11. More specifically, the statistical DB 111 stores statistical values of power usage for multiple periods of the year, for example, spring (April to June), summer (July to September), autumn (October to December), and winter (January to March).
  • the lifestyle patterns of users in the house 11 change for each period of the year. For example, in spring and autumn, users do not use air conditioners, and in summer, users use air conditioners. For example, in winter, users use air conditioners and heating appliances such as electric heaters. Power usage in the house 11 changes according to the lifestyle patterns of users, and therefore shows a fixed trend for each period.
  • the statistical DB 111 stores statistical values of power usage that differ for each period.
  • the statistical value of power usage is not the total amount of power usage during a period of time, but an instantaneous value of power usage.
  • the statistical value is, for example, an average value.
  • the statistical value may be a median.
  • the statistical value may be a mode. In other words, the statistical value may be a representative value.
  • the voltage value in the power line 23 connected to the system power supply is the same as the voltage value in the electrical wiring 20.
  • the voltage applied to the power line extending from the plug 31 of the charging/discharging device 30 is the same as the voltage in the power line 23.
  • the statistical value of the power usage for each period stored in the statistical DB 111 may be the statistical value of the current usage for each period in the house 11.
  • the input device 104 includes a keyboard and a pointing device such as a mouse.
  • the input device 104 may be a capacitive or pressure-sensitive touch pad overlaid on the screen of the display device 105.
  • the input device 104 is used to input data to the management device 100.
  • the display device 105 includes, for example, a liquid crystal panel or an OEL (organic electroluminescence) panel.
  • the display device 105 can display text or graphic information.
  • the communication I/F 106 is used for communication with the charging/discharging device 30.
  • the communication I/F 106 is, for example, a wired communication interface, and is connected to the wireless communication device 200 via a signal line.
  • the communication I/F 106 may be a wireless communication interface.
  • the communication I/F 106 can communicate using a specific communication protocol, for example TCP/IP.
  • FIG. 6 is a functional block diagram showing an example of the functions of a measurement accuracy management system according to an embodiment.
  • the smart meter 50 has the functionality of a transmission unit 510.
  • the management device 100 When the processor 101 executes the management program 110, the management device 100 functions as a measurement instruction unit 111, a first acquisition unit 112, a second acquisition unit 113, a calculation unit 114, a determination unit 115, a calibration execution instruction unit 116, a notification processing unit 117, and an output unit 118.
  • the charging/discharging device 30 has the functions of a charging/discharging control unit 321, a measurement value acquisition unit 322, a transmission unit 323, a reception unit 324, a calibration execution unit 325, and a notification request unit 326.
  • the measurement instruction unit 111 instructs the charge/discharge device 30 to measure power.
  • the charge/discharge control unit 321 When the charge/discharge control unit 321 receives an instruction to measure power from the measurement instruction unit 111, it discharges, charges, or charges/discharges the in-vehicle battery 401. Specifically, the instruction to measure power is used as a trigger to control the power conversion circuit 301, and starts charging, discharging, or charging/discharging the in-vehicle battery 401. Charging, discharging, or charging/discharging the in-vehicle battery 401 is performed in a specific pattern (hereinafter referred to as a "determination pattern").
  • the determination pattern is, for example, a voltage pattern.
  • the determination pattern may be a current pattern, or both a voltage pattern and a current pattern.
  • the judgment pattern is different from the pattern used during normal charging of the vehicle battery 401 or normal discharging of the vehicle battery 401.
  • the judgment pattern may be a pattern for measuring power. This allows the vehicle battery 401 to be charged, discharged, or charged and discharged using a judgment pattern suitable for current measurement, and the accuracy of the power measurement can be accurately determined.
  • the power measurement unit 33 measures the voltage and current when the in-vehicle battery 401 is charging, discharging, or charging and discharging in the determination pattern.
  • the power measurement unit 33 may measure the voltage and current only when the in-vehicle battery 401 is charging, or may measure the voltage and current only when the in-vehicle battery 401 is discharging. However, in order to accurately determine the measurement accuracy of the power measurement unit 33, it is preferable to measure the voltage and current during both charging and discharging.
  • the measurement value acquisition unit 322 acquires the measurement value (target measurement value) by the power measurement unit 33. Specifically, the measurement value acquisition unit 322 acquires the voltage measurement value (target voltage value) and the current measurement value (target current value) by the power measurement unit 33.
  • the transmitting unit 323 transmits target measurement information including the target measurement value acquired by the measurement value acquiring unit 322 to the management device 100.
  • the target measurement information includes the target voltage value, the measurement time of the target current value (hereinafter also referred to as the "target voltage measurement time"), the target current value, and the measurement time of the target current value (hereinafter also referred to as the "target current measurement time”).
  • the target voltage measurement time and the target current measurement time may be the same time.
  • the target measurement information may include only one of the target voltage measurement time and the target current measurement time.
  • the smart meter 50 repeatedly measures the voltage and current at a predetermined time interval.
  • the transmission unit 510 acquires the measurement value (reference measurement value) while the vehicle battery 401 is charging, discharging, or charging and discharging in the above-mentioned judgment pattern, and transmits reference measurement information including the reference measurement value to the management device 100.
  • the reference measurement information includes the voltage measurement value (reference voltage value) while the vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern, the measurement time of the reference voltage value (hereinafter also referred to as the "reference voltage measurement time"), the current measurement value (reference current value) while the vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern, and the measurement time of the reference current value (hereinafter also referred to as the "reference current measurement time").
  • the reference voltage measurement time and the reference current measurement time may be the same time.
  • the reference measurement information may include only one of the reference voltage measurement time and the reference current measurement time.
  • the first acquisition unit 112 acquires a reference measurement value from the smart meter 50. For example, the first acquisition unit 112 receives reference measurement information transmitted from the smart meter 50.
  • the second acquisition unit 113 acquires the target measurement value obtained by the charging/discharging device 30. For example, the second acquisition unit 113 receives the target measurement information transmitted from the charging/discharging device 30.
  • the determination unit 115 determines whether or not it is necessary to perform calibration of the power measurement unit 33 of the charging/discharging device 30 based on the reference measurement value acquired by the first acquisition unit 112 and the target measurement value acquired by the second acquisition unit 113.
  • the calculation unit 114 can calculate the charge/discharge power value charged or discharged by the charge/discharge device 30 based on the power usage value and reference power value of the load 60 connected to the electrical wiring 20. For example, the power usage value of the load 60 is selected from multiple statistical values of the power usage value of the load 60 calculated for each period of the year. In one example, the calculation unit 114 selects one statistical value (for the period corresponding to the present) from the statistical values for each period stored in the statistical DB 111.
  • the determination unit 115 compares the reference measurement value with the target measurement value.
  • the smart meter 50 undergoes rigorous testing, and therefore has high power measurement accuracy and high reliability of the measurement value. For this reason, the determination unit 115 takes the reference measurement value as the true value and determines how much the target measurement value deviates from the reference measurement value, that is, how much error is included in the target measurement value. If the error is within a predetermined allowable range, it is determined that the measurement accuracy of the power measurement unit 33 of the charging/discharging device 30 meets a certain standard. In this case, the determination unit 115 can determine that calibration of the power measurement unit 33 is unnecessary. If the error is outside the allowable range, it is determined that the measurement accuracy of the power measurement unit 33 of the charging/discharging device 30 does not meet the standard. In this case, the determination unit 115 can determine that calibration of the power measurement unit 33 is necessary.
  • the determination unit 115 can compare the charge/discharge power value calculated by the calculation unit 114 with the target measurement value, and determine whether or not it is necessary to perform calibration of the power measurement unit 33 based on the comparison result. This makes it possible to check the measurement accuracy of the power measurement unit 33, taking into account differences in the amount of power used depending on the time of year. Note that if the charge/discharge power value is not calculated using statistical values, the function of the calculation unit 114 can be omitted.
  • the determination unit 115 may execute a first determination process and a second determination process.
  • the first determination process is a process for determining whether or not it is necessary to perform calibration of the power measurement unit 33 based on a reference voltage value and a target voltage value.
  • the second determination process is a process for determining whether or not it is necessary to perform calibration of the power measurement unit 33 based on a reference current value and a target current value.
  • the judgment unit 115 calculates the difference D1 between the reference voltage value and the target voltage value.
  • the difference D1 is the absolute value of the difference between the reference voltage value and the target voltage value, and is the measurement error of the voltage sensor 33V.
  • the judgment unit 115 compares the difference D1 with a preset threshold Th1.
  • the threshold Th1 defines the allowable range of the measurement error of the voltage sensor 33V. If the difference D1 is equal to or less than the threshold Th1, the judgment unit 115 judges that it is not necessary to perform calibration of the power measurement unit 33. If the difference D1 is greater than the threshold Th1, the judgment unit 115 judges that it is necessary to perform calibration of the power measurement unit 33.
  • the calculation unit 114 subtracts the statistical value of the current usage obtained from the statistical DB 111 from the reference current value. This calculates the charge/discharge current value by the charge/discharge device 30.
  • the charge/discharge current value corresponds to the value of the current flowing through the power line between the power conversion circuit 301 and the plug 31. In other words, the charge/discharge current value can be the true value of the current value measured by the current sensor 33A.
  • the judgment unit 115 calculates the difference D2 between the charge/discharge current value and the target current value.
  • the difference D2 is the absolute value of the difference between the charge/discharge current value and the target current value, and is the measurement error of the current sensor 33A.
  • the judgment unit 115 compares the difference D2 with a preset threshold value Th2.
  • the threshold value Th2 defines the allowable range of the measurement error of the current sensor 33A. If the difference D2 is equal to or less than the threshold value Th2, the judgment unit 115 judges that it is not necessary to perform calibration of the power measurement unit 33. If the difference D2 is greater than the threshold Th2, the determination unit 115 determines that it is necessary to perform calibration of the power measurement unit 33.
  • the first acquisition unit 112 acquires a reference measurement value measured by the smart meter 50 during a specific time period of the day.
  • the second acquisition unit 113 acquires a target measurement value measured by the power measurement unit 33 during a specific time period of the day. More specifically, the first acquisition unit 112 acquires a reference measurement value measured by the smart meter 50 at night, and the second acquisition unit 113 acquires a target measurement value measured by the power measurement unit 33 at night.
  • the need for calibration of the power measurement unit 33 is determined based on the power value measured at night when the power consumption of the load 60 is small and no power is generated by the solar power generation device 70, so that the determination error due to the power consumption of the load 60 and the amount of power generated by the solar power generation device 70 can be reduced.
  • the statistical value of the power consumption (current consumption) accumulated in the statistical DB 111 is the statistical value of the power consumption (current consumption) at night.
  • the calibration execution instruction unit 116 transmits instruction information instructing the execution of calibration when the determination unit 115 determines that the execution of calibration of the power measurement unit 33 is necessary.
  • the reception unit 324 receives the instruction information transmitted from the calibration execution instruction unit 116.
  • the calibration execution unit 325 executes the calibration of the power measurement unit 33 based on the instruction information received by the reception unit 324.
  • the instruction information includes reference power information used for calibrating the power measurement unit 33.
  • the reference power information is a measurement value of the power measurement unit 51 that corresponds to a known measurement value by the power measurement unit 33. More specifically, the reference power information is a measurement value of the power of the power measurement unit 51 at a time that is the same as or close to the measurement time of the known measurement value by the power measurement unit 33.
  • the reference power information may be a measurement value (reference measurement value) obtained by the power measurement unit 51 while the vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern.
  • the instruction information includes a calibration voltage value based on the voltage value measured by the voltage sensor 51V and a calibration current value based on the current value measured by the current sensor 51A.
  • the reference power information includes, as calibration voltage values and calibration current values, the voltage measurement value (reference voltage value) obtained by the voltage sensor 51V and the current measurement value (reference current value) obtained by the current sensor 51A while the vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern. Since the reference voltage measurement time and the target voltage measurement time correspond to each other (are the same or close to each other), the reference voltage value corresponds to the target voltage value. Since the reference current measurement time and the target current measurement time correspond to each other (are the same or close to each other), the reference current value corresponds to the target current value.
  • the calibration execution unit 325 performs calibration of the voltage sensor 33V based on the calibration voltage value.
  • the calibration execution unit 325 performs calibration of the current sensor 33A based on the calibration current value.
  • the calibration execution unit 325 adjusts the voltage sensor 33V so that the measurement value of the voltage sensor 33V when the same voltage as when the target voltage value was measured is applied to the power line extending from the bidirectional AC/DC converter 311 to the plug 31 matches the reference voltage value (calibration voltage value).
  • the calibration execution unit 325 adjusts the current sensor 33A so that the measurement value of the current sensor 33A when the same current as when the target current value was measured is applied to the power line extending from the bidirectional AC/DC converter 311 to the plug 31 matches the reference current value (calibration current value). In this way, the voltage sensor 33V and the current sensor 33A are calibrated.
  • the notification request unit 326 requests the management device 100 to output notification information when the calibration execution unit 325 executes calibration of the power measurement unit 33.
  • the notification information is information for notifying the user that calibration has been executed.
  • the notification processing unit 117 receives a request from the notification request unit 326. Upon receiving the request, the notification processing unit 117 executes notification processing to output notification information. The output unit 118 outputs the notification information according to the notification processing by the notification processing unit 117.
  • the output unit 118 is, for example, the display device 105.
  • the notification information is, for example, a notification screen that notifies the user that calibration has been performed.
  • FIG. 7 is a diagram showing an example of the notification screen.
  • the notification screen 150 in the example of FIG. 7 includes text information saying "Power measurement calibration has been performed.” This makes it possible to notify the user that calibration has been performed.
  • FIG. 8 is a sequence diagram showing an example of the operation of the entire measurement accuracy control system according to the embodiment.
  • the management device 100 transmits a power measurement instruction to the charge/discharge device 30 (step S11).
  • the charge/discharge device 30 receives the measurement instruction from the management device 100, it charges, discharges, or charges/discharges the in-vehicle battery 401 according to the determination pattern.
  • the power measurement unit 33 repeatedly measures the voltage and current at a constant cycle. Therefore, the power measurement unit 33 measures the voltage and current even while the in-vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern.
  • the power measurement unit 51 also repeatedly measures the voltage and current at a constant cycle. Therefore, the power measurement unit 51 measures the voltage and current even while the in-vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern.
  • the power measurement unit 51 generates reference measurement information including a reference voltage value and a reference voltage measurement time, as well as a reference current value and a reference current measurement time while the in-vehicle battery 401 is charging, discharging, or charging and discharging in the determination pattern, and transmits the generated reference measurement information to the management device 100 (step S13).
  • the power measurement unit 33 generates target measurement information including the target voltage value and the target voltage measurement time, as well as the target current value and the target current measurement time while the vehicle battery 401 is charging, discharging, or charging and discharging in the determination pattern, and transmits the generated target measurement information to the management device 100 (step S14).
  • the management device 100 executes a determination process to determine whether or not it is necessary to perform calibration of the power measurement unit 33 based on the received reference measurement information and target measurement information (step S15).
  • the determination process includes the first determination process and the second determination process described above.
  • the management device 100 transmits instruction information to the charging/discharging device 30 to instruct it to perform calibration (step S16). Upon receiving the instruction information, the charging/discharging device 30 performs calibration of the power measurement unit 33 (step S17).
  • the charging/discharging device 30 requests the management device 100 to notify the user that the calibration has been performed (step S18).
  • the management device 100 accepts the request, it displays a notification screen 150 on the display device 105 (step S19).
  • FIG. 9 is a flowchart showing an example of the processing of the management device according to an embodiment.
  • the management device 100 performs the following processing by the processor 101 executing the management program 110.
  • the following processing is performed at a specific time, for example, at night.
  • the user inserts the plug 31 of the charging/discharging device 30 into the connector 21, and the plug 32 into the inlet 403 of the electric vehicle 40. This connects the charging/discharging device 30 to the electrical wiring 20, and the charging/discharging device 30 is connected to the electric vehicle 40.
  • the processor 101 recognizes the connection (step S101).
  • the processor 101 sends a power measurement instruction to the charging/discharging device 30 (step S102). This causes the charging/discharging device 30 to charge, discharge, or charge/discharge the in-vehicle battery 401 in the judgment pattern. While the in-vehicle battery 401 is charging, discharging, or charging/discharging in the judgment pattern, the voltage and current are measured by the power measurement unit 51 and the power measurement unit 33.
  • the smart meter 50 transmits the reference measurement information to the management device 100.
  • the management device 100 receives the reference measurement information (step S103).
  • the charging/discharging device 30 transmits the target measurement information to the management device 100.
  • the management device 100 receives the target measurement information (step S104).
  • the processor 101 obtains the statistical value of power usage for the period corresponding to the present from the statistical DB 111 (step S105).
  • the statistical value of current usage is used as the statistical value of power usage.
  • the processor 101 subtracts the statistical value of current usage from the reference current value included in the reference measurement information to calculate the charge/discharge current value (step S106).
  • the processor 101 calculates the difference D1 between the reference voltage value and the target voltage value (step S107), and calculates the difference D2 between the charge/discharge current value and the target current value (step S108).
  • the processor 101 compares the difference D1 with the threshold Th1 and determines whether the difference D1 is greater than the threshold Th1 (step S109).
  • the processor 101 compares the difference D2 with the threshold Th2 and determines whether the difference D2 is greater than the threshold Th2 (step S110).
  • step S110 If the difference D2 is equal to or less than the threshold Th2 (NO in step S110), the processing of the management device 100 ends.
  • the processor 101 determines that calibration of the power measurement unit 33 is necessary.
  • the processor 101 generates instruction information and transmits the generated instruction information to the charging/discharging device 30 (step S111).
  • the charging/discharging device 30 that receives the instruction information calibrates the power measurement unit 33 using the reference power information included in the instruction information. When the calibration is completed, the charging/discharging device 30 transmits a notification request for calibration execution to the management device 100.
  • the management device 100 receives a notification request from the charging/discharging device 30 (step S112).
  • the processor 101 displays the notification screen 150 on the display device 105 in accordance with the notification request (step S113). This completes the processing of the management device 100.
  • the voltage value measured in the smart meter 50 is set as a reference voltage value, and whether or not calibration of the power measurement unit 33 of the charging/discharging device 30 is determined based on the reference voltage value and the target voltage value measured in the charging/discharging device 30 (first determination process), and the current value measured in the smart meter 50 is set as a reference current value, and whether or not calibration of the power measurement unit 33 of the charging/discharging device 30 is determined based on the reference current value and the target current value measured in the charging/discharging device 30 (second determination process), but this is not limited to the above.
  • the power value output from the smart meter 50 may be set as a reference power value, and whether or not calibration of the power measurement unit 33 of the charging/discharging device 30 is determined based on the reference power value and the target power value calculated from the voltage value, current value, and power factor measured in the charging/discharging device 30.
  • the management device 100 can also calculate the charge/discharge power value of the charge/discharge device 30 by obtaining the statistical value of power usage for the period corresponding to the present from the statistical DB 111 and subtracting the statistical value of power usage from the reference power value.
  • the management device 100 can also calculate the difference between the calculated charge/discharge power value and a target power value measured in the charge/discharge device 30 and compare the difference with a preset threshold value to determine whether calibration of the power measurement unit 33 is required.
  • the smart meter 50 is used as the reference measurement unit to determine whether calibration of the power measurement unit 33, which is the target measurement unit, is required, but this is not limited to the above.
  • the power measurement unit 221 provided in the distribution board 22 can also be used as the reference measurement unit. Since the power measurement unit 221 measures the charge/discharge voltage and charge/discharge current of the charge/discharge device 30, correction based on the statistical value of power usage is not required. Therefore, it is possible to determine whether calibration of the power measurement unit 33 is required by simpler processing.
  • the management device 100 determines whether or not calibration of the power measurement unit 33 is necessary, and if it is determined that calibration is necessary, instructs the charge/discharge device 30 to perform calibration of the power station side unit 33.
  • the charge/discharge device 30 may determine whether or not calibration of the power measurement unit 33 is necessary, and if it is determined that calibration is necessary, instruct the charge/discharge device 30 to perform calibration of the power station side unit 33.
  • the charge/discharge device 30 may have the functions of the determination unit 115 and the calibration execution instruction unit 116 (and the calculation unit 114) shown in FIG. 6.
  • the charging/discharging device 30 is used to charge and discharge the on-board battery of the electric vehicle 40, but is not limited to this.
  • it may be a charging/discharging device for a battery fixedly installed in the house 11.

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Abstract

This measurement accuracy management system comprises: a charging/discharging device for charging/discharging a battery; a management device; and a reference measurement unit that measures power in an electric wire. The charging/discharging device includes a target measurement unit that measures charging/discharging power. The management device includes a first acquisition unit that acquires a reference measurement value from the reference measurement unit and a second acquisition unit that acquires a target measurement value from the target measurement unit. The measurement accuracy management system is provided with: a determination unit that determines, on the basis of the reference measurement value and the target measurement value, whether or not calibration for the target measurement unit is needed to be executed; and an instruction unit that, when the determination unit has determined that the calibration for the target measurement unit is needed to be executed, transmits instruction information for instructing execution of the calibration. The charging/discharging device includes a control unit that executes the calibration for the target measurement unit on the basis of the instruction information transmitted from the instruction unit.

Description

計測精度管理システム、管理装置、管理方法、管理プログラム、及び充放電装置Measurement accuracy control system, management device, management method, management program, and charge/discharge device
　本開示は、計測精度管理システム、管理装置、管理方法、管理プログラム、及び充放電装置に関する。 This disclosure relates to a measurement accuracy management system, a management device, a management method, a management program, and a charge/discharge device.
　特許文献１には、住宅におけるガス給湯器、電気給湯器、エアコン等の設備が、当該設備の動作特性値を検出し、検出された動作特性値に基づいて設備の故障リスクを判定し、設備管理サーバが、故障リスクに基づいて、設備の故障が予測される故障予測時期、及び故障予測時期までに設備が故障する確率を生成し、住宅に設けられた入出力装置が、故障予測時期及び設備が故障する確率を表示する設備管理システムが開示されている。 Patent Document 1 discloses an equipment management system in which equipment in a home, such as a gas water heater, electric water heater, or air conditioner, detects the operating characteristic values of the equipment and determines the equipment failure risk based on the detected operating characteristic values, an equipment management server generates a failure prediction time for the equipment to fail based on the failure risk, and the probability that the equipment will fail by the predicted failure time, and an input/output device installed in the home displays the predicted failure time and the probability of the equipment failing.
特開２０２２－０００９８４号公報JP 2022-000984 A
　本開示の一態様に係る計測精度管理システムは、系統電源に接続された電気配線を通じて、バッテリを充放電する充放電装置と、前記電気配線に接続された負荷の使用電力及び前記充放電装置による充放電電力を管理する管理装置と、前記電気配線における電力を計測する基準計測部と、を備える計測精度管理システムであって、前記充放電装置は、前記バッテリの充放電電力を計測する対象計測部を含み、前記管理装置は、前記基準計測部による電力の計測値である基準計測値を取得する第１取得部と、前記対象計測部による前記バッテリの充放電電力の計測値である対象計測値を取得する第２取得部と、を含み、前記計測精度管理システムは、前記第１取得部によって取得された前記基準計測値と、前記第２取得部によって取得された前記対象計測値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定する判定部と、前記判定部によって前記対象計測部のキャリブレーションの実行が必要であると判定された場合に、前記キャリブレーションの実行を指示する指示情報を送信する指示部と、を備え、前記充放電装置は、前記指示部から送信された前記指示情報に基づいて、前記対象計測部のキャリブレーションを実行するキャリブレーション実行部を含む。 A measurement accuracy management system according to one embodiment of the present disclosure includes a charge/discharge device that charges and discharges a battery through an electrical wiring connected to a power grid, a management device that manages the power used by a load connected to the electrical wiring and the charging/discharging power of the charge/discharge device, and a reference measurement unit that measures the power in the electrical wiring. The charge/discharge device includes a target measurement unit that measures the charging/discharging power of the battery, and the management device includes a first acquisition unit that acquires a reference measurement value that is a measurement value of the power by the reference measurement unit, and a second acquisition unit that acquires a target measurement value that is a measurement value of the charging/discharging power of the battery by the target measurement unit. The measurement accuracy management system includes a determination unit that determines whether or not it is necessary to perform calibration of the target measurement unit based on the reference measurement value acquired by the first acquisition unit and the target measurement value acquired by the second acquisition unit, and an instruction unit that transmits instruction information to perform the calibration when it is determined by the determination unit that it is necessary to perform calibration of the target measurement unit. The charge/discharge device includes a calibration execution unit that executes calibration of the target measurement unit based on the instruction information transmitted from the instruction unit.
　本開示は、上記のような特徴的な構成を備える計測精度管理システムとして実現することができるだけでなく、計測精度管理システムに含まれる管理装置として実現したり、管理装置における特徴的な処理をステップとする管理方法として実現したりすることができる。本開示は、コンピュータを管理装置として機能させるコンピュータプログラムとして実現したり、管理装置の一部又は全部を半導体集積回路として実現したり、計測精度管理システムに含まれる充放電装置として実現したりすることができる。 The present disclosure can be realized not only as a measurement accuracy control system having the characteristic configuration described above, but also as a management device included in the measurement accuracy control system, or as a management method having steps corresponding to characteristic processes in the management device. The present disclosure can be realized as a computer program that causes a computer to function as a management device, or as a semiconductor integrated circuit as part or all of the management device, or as a charge/discharge device included in the measurement accuracy control system.
図１は、実施形態に係る計測精度管理システムの全体構成の一例を示す図である。FIG. 1 is a diagram showing an example of the overall configuration of a measurement accuracy control system according to an embodiment. 図２は、実施形態に係る電力変換装置の構成の一例を示すブロック図である。FIG. 2 is a block diagram illustrating an example of a configuration of a power conversion device according to an embodiment. 図３は、実施形態に係る充放電装置のハードウェア構成の一例を示すブロック図である。FIG. 3 is a block diagram illustrating an example of a hardware configuration of the charging/discharging device according to the embodiment. 図４は、充放電装置における電力変換回路の構成の一例を示す回路図である。FIG. 4 is a circuit diagram showing an example of the configuration of a power conversion circuit in a charge/discharge device. 図５は、実施形態に係る管理装置のハードウェア構成の一例を示すブロック図である。FIG. 5 is a block diagram illustrating an example of a hardware configuration of a management device according to an embodiment. 図６は、実施形態に係る計測精度管理システムの機能の一例を示す機能ブロック図である。FIG. 6 is a functional block diagram showing an example of functions of a measurement accuracy management system according to an embodiment. 図７は、通知画面の一例を示す図である。FIG. 7 is a diagram showing an example of the notification screen. 図８は、実施形態に係る計測精度管理システム全体の動作の一例を示すシーケンス図である。FIG. 8 is a sequence diagram showing an example of the operation of the entire measurement accuracy control system according to the embodiment. 図９は、実施形態に係る管理装置の処理の一例を示すフローチャートである。FIG. 9 is a flowchart illustrating an example of a process of the management device according to the embodiment.
　＜本開示が解決しようとする課題＞
　系統電源だけでなく、太陽光発電、蓄電池、電気自動車等を電源として使用する電源の分散化が進んでいる。家庭が分散型電源による電力をアグリゲータ（分散型電源による電力を集約し、集約された電力を需要家に供給する事業者）と取引することが想定される。このような電力取引のためには、分散型電源から供給する電力を正確に計測する必要がある。 <Problems to be Solved by the Present Disclosure>
The decentralization of power sources is progressing, using not only grid power sources but also solar power generation, storage batteries, electric vehicles, etc. as power sources. It is expected that households will trade electricity from distributed power sources with aggregators (businesses that aggregate electricity from distributed power sources and supply the aggregated electricity to consumers). For such electricity trading, it is necessary to accurately measure the electricity supplied from distributed power sources.
　＜本開示の効果＞
　本開示によれば、充放電装置における電力計測の精度を管理することができる。 <Effects of the present disclosure>
According to the present disclosure, the accuracy of power measurement in a charge/discharge device can be managed.
　＜本開示の実施形態の概要＞
　以下、本開示の実施形態の概要を列記して説明する。 Overview of the embodiments of the present disclosure
Below, an overview of the embodiments of the present disclosure will be listed and described.
　（１）　本実施形態に係る計測精度管理システムは、系統電源に接続された電気配線を通じて、バッテリを充放電する充放電装置と、前記電気配線に接続された負荷の使用電力及び前記充放電装置による充放電電力を管理する管理装置と、前記電気配線における電力を計測する基準計測部と、を備える計測精度管理システムであって、前記充放電装置は、前記バッテリの充放電電力を計測する対象計測部を含み、前記管理装置は、前記基準計測部による電力の計測値である基準計測値を取得する第１取得部と、前記対象計測部による前記バッテリの充放電電力の計測値である対象計測値を取得する第２取得部と、を含み、前記計測精度管理システムは、前記第１取得部によって取得された前記基準計測値と、前記第２取得部によって取得された前記対象計測値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定する判定部と、前記判定部によって前記対象計測部のキャリブレーションの実行が必要であると判定された場合に、前記キャリブレーションの実行を指示する指示情報を送信する指示部と、を備え、前記充放電装置は、前記指示部から送信された前記指示情報に基づいて、前記対象計測部のキャリブレーションを実行するキャリブレーション実行部を含む。これにより、対象計測部の電力の計測精度が低下している場合には、対象計測部のキャリブレーションを実行することができる。したがって、充放電装置における電力計測の精度を管理することができる。電力は、電圧と電流とで定まる。すなわち、電力値は、電圧値と電流値とから算出される。ここでいう「電力の計測値」は、電力の計測値そのものだけでなく、電圧の計測値と電流の計測値との組み合わせも含まれる。 (1) The measurement accuracy management system according to this embodiment includes a charge/discharge device that charges and discharges a battery through an electrical wiring connected to a power grid, a management device that manages the power usage of a load connected to the electrical wiring and the charging/discharging power by the charge/discharge device, and a reference measurement unit that measures the power in the electrical wiring, wherein the charge/discharge device includes a target measurement unit that measures the charging/discharging power of the battery, and the management device includes a first acquisition unit that acquires a reference measurement value that is a measurement value of the power by the reference measurement unit, and a second acquisition unit that acquires a target measurement value that is a measurement value of the charging/discharging power of the battery by the target measurement unit, and the measurement accuracy management system includes a determination unit that determines whether or not it is necessary to perform calibration of the target measurement unit based on the reference measurement value acquired by the first acquisition unit and the target measurement value acquired by the second acquisition unit, and an instruction unit that transmits instruction information to perform the calibration when it is determined by the determination unit that it is necessary to perform calibration of the target measurement unit, and the charge/discharge device includes a calibration execution unit that executes calibration of the target measurement unit based on the instruction information transmitted from the instruction unit. This allows the target measurement unit to be calibrated if the power measurement accuracy of the target measurement unit has decreased. This makes it possible to manage the accuracy of power measurement in the charging/discharging device. Power is determined by voltage and current. In other words, the power value is calculated from the voltage value and the current value. The "power measurement value" here includes not only the power measurement value itself, but also a combination of the voltage measurement value and the current measurement value.
　（２）　上記（１）において、前記基準計測部は、前記電気配線における電圧を計測する基準電圧センサと、前記電気配線における電流を計測する基準電流センサとを含み、前記対象計測部は、前記バッテリの充放電電圧を計測する対象電圧センサと、前記バッテリの充放電電流を計測する対象電流センサとを含み、前記判定部は、前記基準電圧センサによって計測される電圧値である基準電圧値と、前記対象電圧センサによって計測される電圧値である対象電圧値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定する第１判定処理と、前記基準電流センサによって計測される電流値である基準電流値と、前記対象電流センサによって計測される電流値である対象電流値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定する第２判定処理と、を実行してもよい。これにより、対象電圧センサ及び対象電流センサそれぞれの計測値の精度を管理することができる。 (2) In the above (1), the reference measurement unit may include a reference voltage sensor that measures the voltage in the electrical wiring and a reference current sensor that measures the current in the electrical wiring, the target measurement unit may include a target voltage sensor that measures the charge/discharge voltage of the battery and a target current sensor that measures the charge/discharge current of the battery, and the determination unit may execute a first determination process to determine whether or not calibration of the target measurement unit is required based on a reference voltage value that is a voltage value measured by the reference voltage sensor and a target voltage value that is a voltage value measured by the target voltage sensor, and a second determination process to determine whether or not calibration of the target measurement unit is required based on a reference current value that is a current value measured by the reference current sensor and a target current value that is a current value measured by the target current sensor. This allows the accuracy of the measurement values of the target voltage sensor and the target current sensor to be managed.
　（３）　上記（２）において、前記指示情報は、前記基準電圧センサによって計測された電圧値に基づくキャリブレーション用電圧値と、前記基準電流センサによって計測された電流値に基づくキャリブレーション用電流値とを含み、前記キャリブレーション実行部は、前記キャリブレーション用電圧値に基づいて前記対象電圧センサのキャリブレーションを実行し、前記キャリブレーション用電流値に基づいて前記対象電流センサのキャリブレーションを実行してもよい。これにより、対象電圧センサ及び対象電流センサそれぞれのキャリブレーションを実行することにより、対象電圧センサ及び対象電流センサの計測精度の低下を抑制することができる。 (3) In the above (2), the instruction information may include a calibration voltage value based on a voltage value measured by the reference voltage sensor and a calibration current value based on a current value measured by the reference current sensor, and the calibration execution unit may calibrate the target voltage sensor based on the calibration voltage value and calibrate the target current sensor based on the calibration current value. In this way, by calibrating the target voltage sensor and the target current sensor, respectively, it is possible to suppress a decrease in the measurement accuracy of the target voltage sensor and the target current sensor.
　（４）　上記（１）から（３）のいずれか１つにおいて、前記基準計測値は、前記系統電源から供給される電力又は前記系統電源に逆潮流される電力の計測値であってもよい。これにより、系統電源からの供給電力又は逆潮流電力の計測値に基づいて、対象計測部のキャリブレーションの要否を判定することができる。 (4) In any one of (1) to (3) above, the reference measurement value may be a measurement value of the power supplied from the grid power source or the power flowing back to the grid power source. This makes it possible to determine whether calibration of the target measurement unit is required based on the measurement value of the power supplied from the grid power source or the backflow power.
　（５）　上記（４）において、前記基準計測部は、スマートメータであってもよい。これにより、高い計測精度を有するスマートメータを用いて、対象計測部のキャリブレーションの要否を判定することができる。 (5) In the above (4), the reference measurement unit may be a smart meter. This makes it possible to determine whether or not calibration of the target measurement unit is required using a smart meter with high measurement accuracy.
　（６）　上記（４）又は（５）において、前記計測精度管理システムは、前記電気配線に接続された負荷の使用電力値及び前記基準計測値に基づいて、前記充放電装置によって充電又は放電される充放電電力値を算出する算出部をさらに備え、前記判定部は、前記算出部によって算出された前記充放電電力値と前記対象計測値との比較に基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定してもよい。これにより、系統電源からの供給電力又は逆潮流電力の計測値と、負荷の使用電力値とに基づいて算出された正確な充放電電力値を用いて、対象計測部のキャリブレーションの要否を判定することができる。 (6) In the above (4) or (5), the measurement accuracy management system may further include a calculation unit that calculates a charge/discharge power value charged or discharged by the charge/discharge device based on the power consumption value of the load connected to the electrical wiring and the reference measurement value, and the determination unit may determine whether or not calibration of the target measurement unit is required based on a comparison between the charge/discharge power value calculated by the calculation unit and the target measurement value. This makes it possible to determine whether or not calibration of the target measurement unit is required using an accurate charge/discharge power value calculated based on the measurement value of the supply power or reverse flow power from the grid power source and the power consumption value of the load.
　（７）　上記（６）において、前記負荷の使用電力値は、１年における時期毎に算出された前記負荷の使用電力値の複数の統計値から選択されてもよい。１年における時期に応じて、負荷の使用電力は変動する。したがって、選択された統計値を用いて、充放電装置による充放電電力値を正確に算出することができる。 (7) In (6) above, the power usage value of the load may be selected from a plurality of statistical values of the power usage value of the load calculated for each time of the year. The power usage value of the load varies depending on the time of the year. Therefore, the selected statistical value can be used to accurately calculate the charging/discharging power value of the charging/discharging device.
　（８）　上記（６）又は（７）において、前記負荷の使用電力値は、１日における特定の時間帯における前記負荷の使用電力値であり、前記第１取得部は、前記特定の時間帯において前記基準計測部によって計測された前記基準計測値を取得し、前記第２取得部は、前記特定の時間帯において前記対象計測部によって計測された前記対象計測値を取得してもよい。これにより、特定の時間帯に計測された基準計測値及び対象計測値を用いて、対象計測部のキャリブレーションの要否を正確に判定することができる。 (8) In (6) or (7) above, the power usage value of the load may be the power usage value of the load in a specific time period in one day, the first acquisition unit may acquire the reference measurement value measured by the reference measurement unit in the specific time period, and the second acquisition unit may acquire the target measurement value measured by the target measurement unit in the specific time period. This makes it possible to accurately determine whether calibration of the target measurement unit is required using the reference measurement value and the target measurement value measured in the specific time period.
　（９）　上記（８）において、前記特定の時間帯は、夜間であってもよい。夜間は負荷の使用電力が少ないため、対象計測部のキャリブレーションの要否をより正確に判定することができる。 (9) In the above (8), the specific time period may be nighttime. Since the load uses less power at night, it is possible to more accurately determine whether calibration of the target measurement unit is required.
　（１０）　上記（６）から（９）のいずれか１つにおいて、前記電気配線は、発電機による発電電力を変換する電力変換器に接続されており、前記判定部は、前記電力変換器からの出力電力値にさらに基づいて、前記充放電電力値を算出してもよい。これにより、発電機が設けられている住宅においても、対象計測部のキャリブレーションの要否を正確に判定することができる。 (10) In any one of (6) to (9) above, the electrical wiring may be connected to a power converter that converts power generated by a generator, and the determination unit may calculate the charge/discharge power value further based on the output power value from the power converter. This makes it possible to accurately determine whether calibration of the target measurement unit is required, even in a house equipped with a generator.
　（１１）　上記（１）から（１０）のいずれか１つにおいて、前記充放電装置は、前記バッテリを特定のパターンで充電又は放電する充放電制御部を含み、前記第２取得部は、前記バッテリを特定のパターンで充電又は放電したときの前記対象計測部による前記バッテリの充放電電力の計測値である前記対象計測値を取得してもよい。これにより、対象計測部による計測精度の確認に適したパターンを用いて、対象計測部のキャリブレーションの要否を正確に判定することができる。 (11) In any one of (1) to (10) above, the charging/discharging device may include a charging/discharging control unit that charges or discharges the battery in a specific pattern, and the second acquisition unit may acquire the target measurement value, which is a measurement value of the charging/discharging power of the battery by the target measurement unit when the battery is charged or discharged in the specific pattern. This makes it possible to accurately determine whether or not calibration of the target measurement unit is required by using a pattern suitable for checking the measurement accuracy of the target measurement unit.
　（１２）　上記（１）から（１１）のいずれか１つにおいて、前記管理装置は、前記充放電装置が前記対象計測部のキャリブレーションを実行した場合に、前記キャリブレーションが実行されたことをユーザに通知するための通知情報を出力する出力部を含んでもよい。これにより、キャリブレーションが実行されたことがユーザに通知され、ユーザは充放電装置の対象計測部における電力計測の精度が管理されていることを知ることができる。 (12) In any one of (1) to (11) above, the management device may include an output unit that outputs notification information for notifying a user that the calibration has been performed when the charging/discharging device performs calibration of the target measurement unit. This notifies the user that the calibration has been performed, and the user can know that the accuracy of the power measurement in the target measurement unit of the charging/discharging device is being managed.
　（１３）　上記（１）から（１２）のいずれか１つにおいて、前記管理装置は、前記判定部と、前記指示部とを含んでもよい。これにより、管理装置によって、対象計測部のキャリブレーションの要否を判定することができる。 (13) In any one of (1) to (12) above, the management device may include the determination unit and the instruction unit. This allows the management device to determine whether calibration of the target measurement unit is required.
　（１４）　上記（１）から（１２）のいずれか１つにおいて、前記充放電装置は、前記判定部と、前記指示部とを含んでもよい。これにより、充放電装置によって、対象計測部のキャリブレーションの要否を判定することができる。 (14) In any one of (1) to (12) above, the charging/discharging device may include the determination unit and the instruction unit. This allows the charging/discharging device to determine whether calibration of the target measurement unit is required.
　（１５）　上記（１）から（１４）のいずれか１つにおいて、前記バッテリは、電動車に搭載された車載バッテリであってもよい。これにより、電動車の車載バッテリの充放電装置における電力計測の精度を管理することができる。 (15) In any one of (1) to (14) above, the battery may be an on-board battery mounted on an electric vehicle. This makes it possible to manage the accuracy of power measurement in a charging/discharging device for the on-board battery of the electric vehicle.
　（１６）　本実施形態に係る管理装置は、系統電源に接続された電気配線に接続された負荷の使用電力、及び、前記電気配線を通じてバッテリを充放電する充放電装置充放電装置による充放電電力を管理する管理装置であって、前記電気配線における電力を計測する基準計測部による電力の計測値である基準計測値を取得する第１取得部と、前記充放電装置における充放電電力を計測する対象計測部による前記バッテリの充放電電力の計測値である対象計測値を取得する第２取得部と、前記第１取得部によって取得された前記基準計測値と、前記第２取得部によって取得された前記対象計測値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定する判定部と、前記判定部によって前記対象計測部のキャリブレーションの実行が必要であると判定された場合に、前記キャリブレーションの実行を指示する指示情報を送信する指示部と、を備える。これにより、対象計測部の電力の計測精度が低下している場合には、対象計測部のキャリブレーションを実行することができる。したがって、充放電装置における電力計測の精度を管理することができる。 (16) The management device according to this embodiment is a management device that manages the power consumption of a load connected to an electrical wiring connected to a system power supply and the charging/discharging power of a charging/discharging device that charges and discharges a battery through the electrical wiring, and includes a first acquisition unit that acquires a reference measurement value that is a measurement value of power by a reference measurement unit that measures the power in the electrical wiring, a second acquisition unit that acquires a target measurement value that is a measurement value of the charging/discharging power of the battery by a target measurement unit that measures the charging/discharging power in the charging/discharging device, a determination unit that determines whether or not it is necessary to perform calibration of the target measurement unit based on the reference measurement value acquired by the first acquisition unit and the target measurement value acquired by the second acquisition unit, and an instruction unit that transmits instruction information to perform the calibration when it is determined by the determination unit that it is necessary to perform calibration of the target measurement unit. As a result, when the measurement accuracy of the power of the target measurement unit has decreased, it is possible to perform calibration of the target measurement unit. Therefore, it is possible to manage the accuracy of power measurement in the charging/discharging device.
　（１７）　本実施形態に係る管理方法は、系統電源に接続された電気配線に接続された負荷の使用電力、及び、前記電気配線を通じてバッテリを充放電する充放電装置充放電装置による充放電電力を管理する管理装置によって使用される管理方法であって、前記電気配線における電力を計測する基準計測部による電力の計測値である基準計測値を取得するステップと、前記充放電装置における充放電電力を計測する対象計測部による前記バッテリの充放電電力の計測値である対象計測値を取得するステップと、取得された前記基準計測値と、取得された前記対象計測値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定するステップと、前記対象計測部のキャリブレーションの実行が必要であると判定された場合に、前記キャリブレーションの実行を指示する指示情報を送信するステップと、を含む。これにより、対象計測部の電力の計測精度が低下している場合には、対象計測部のキャリブレーションを実行することができる。したがって、充放電装置における電力計測の精度を管理することができる。 (17) The management method according to the present embodiment is a management method used by a management device that manages the power consumption of a load connected to an electrical wiring connected to a system power supply and the charging/discharging power of a charging/discharging device that charges and discharges a battery through the electrical wiring, and includes the steps of acquiring a reference measurement value that is a measurement value of power by a reference measurement unit that measures the power in the electrical wiring, acquiring a target measurement value that is a measurement value of the charging/discharging power of the battery by a target measurement unit that measures the charging/discharging power in the charging/discharging device, determining whether or not it is necessary to perform calibration of the target measurement unit based on the acquired reference measurement value and the acquired target measurement value, and transmitting instruction information that instructs the execution of the calibration when it is determined that it is necessary to perform calibration of the target measurement unit. As a result, when the measurement accuracy of the power of the target measurement unit has decreased, it is possible to perform calibration of the target measurement unit. Therefore, it is possible to manage the accuracy of power measurement in the charging/discharging device.
　（１８）　本実施形態に係る管理プログラムは、系統電源に接続された電気配線に接続された負荷の使用電力、及び、前記電気配線を通じてバッテリを充放電する充放電装置充放電装置による充放電電力を管理する管理装置によって使用される管理プログラムであって、コンピュータに、前記電気配線における電力を計測する基準計測部による電力の計測値である基準計測値を取得するステップと、前記充放電装置における充放電電力を計測する対象計測部による前記バッテリの充放電電力の計測値である対象計測値を取得するステップと、取得された前記基準計測値と、取得された前記対象計測値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定するステップと、前記対象計測部のキャリブレーションの実行が必要であると判定された場合に、前記キャリブレーションの実行を指示する指示情報を送信するステップと、を実行させる。これにより、対象計測部の電力の計測精度が低下している場合には、対象計測部のキャリブレーションを実行することができる。したがって、充放電装置における電力計測の精度を管理することができる。 (18) The management program according to this embodiment is a management program used by a management device that manages the power consumption of a load connected to an electrical wiring connected to a system power supply and the charging/discharging power of a charging/discharging device that charges and discharges a battery through the electrical wiring, and causes a computer to execute the steps of: acquiring a reference measurement value that is a measurement value of power by a reference measurement unit that measures the power in the electrical wiring; acquiring a target measurement value that is a measurement value of the charging/discharging power of the battery by a target measurement unit that measures the charging/discharging power in the charging/discharging device; determining whether or not it is necessary to perform calibration of the target measurement unit based on the acquired reference measurement value and the acquired target measurement value; and transmitting instruction information that instructs the execution of the calibration when it is determined that it is necessary to perform calibration of the target measurement unit. As a result, when the measurement accuracy of the power of the target measurement unit has decreased, it is possible to perform calibration of the target measurement unit. Therefore, it is possible to manage the accuracy of power measurement in the charging/discharging device.
　（１９）　本実施形態に係る充放電装置は、系統電源に接続された電気配線を通じて、バッテリを充放電する充放電装置であって、前記バッテリの充放電電力を計測する対象計測部と、前記電気配線における電力を計測する基準計測部による電力の計測値である基準計測値、及び、前記対象計測部による前記バッテリの充放電電力の計測値である対象計測値に基づく、前記対象計測部のキャリブレーションの実行が必要であるか否かの判定結果に基づいて、前記対象計測部のキャリブレーションを実行するキャリブレーション実行部と、を備える。これにより、基準計測値と対象計測値とに基づくキャリブレーションの実行が必要であるか否かの判定結果に基づいて、充放電装置の対象計測部のキャリブレーションを実行することができる。したがって、充放電装置における電力計測の精度を管理することができる。 (19) The charge/discharge device according to this embodiment is a charge/discharge device that charges and discharges a battery through an electrical wiring connected to a system power supply, and includes a target measurement unit that measures the charging/discharging power of the battery, and a calibration execution unit that executes calibration of the target measurement unit based on a determination result of whether or not calibration of the target measurement unit is required based on a reference measurement value that is a measurement value of power by a reference measurement unit that measures power in the electrical wiring, and a target measurement value that is a measurement value of the charging/discharging power of the battery by the target measurement unit. This makes it possible to execute calibration of the target measurement unit of the charge/discharge device based on the determination result of whether or not calibration is required based on the reference measurement value and the target measurement value. Therefore, the accuracy of power measurement in the charge/discharge device can be managed.
　＜本開示の実施形態の詳細＞
　以下、図面を参照しつつ、本発明の実施形態の詳細を説明する。なお、以下に記載する実施形態の少なくとも一部を任意に組み合わせてもよい。 <Details of the embodiment of the present disclosure>
Hereinafter, the details of the embodiments of the present invention will be described with reference to the drawings. Note that at least some of the embodiments described below may be combined in any desired manner.
［１．計測精度管理システム］
　図１は、実施形態に係る計測精度管理システムの全体構成の一例を示す図である。計測精度管理システム１０は、電気自動車、ハイブリッド車、プラグインハイブリッド車等、モータの動力によって推進する電動車４０の車載バッテリ用の充放電装置３０の電力計測の精度を管理する。計測精度管理システム１０は、住宅１１に設けられる。計測精度管理システム１０は、充放電装置３０と、管理装置１００と、スマートメータ５０とを含む。 [1. Measurement accuracy control system]
1 is a diagram showing an example of the overall configuration of a measurement accuracy management system according to an embodiment. The measurement accuracy management system 10 manages the accuracy of power measurement of a charge/discharge device 30 for an on-board battery of an electric vehicle 40 that is propelled by the power of a motor, such as an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle. The measurement accuracy management system 10 is provided in a house 11. The measurement accuracy management system 10 includes the charge/discharge device 30, a management device 100, and a smart meter 50.
　充放電装置３０は、住宅１１に敷設された電気配線２０に接続される。電気配線２０は、系統電源に接続され、系統電源から供給される交流電力を伝送する。 The charging/discharging device 30 is connected to electrical wiring 20 installed in the house 11. The electrical wiring 20 is connected to a power grid and transmits AC power supplied from the power grid.
　電気配線２０は、複数の末端を含み、その１つは住宅１１の外部まで延びる。住宅１１の外部の末端にコネクタ２１が設けられている。充放電装置３０は、コネクタ２１に接続することができる。さらに具体的には、コネクタ２１は、充放電装置３０に設けられたプラグ３１を差し込むことができる。 The electrical wiring 20 includes multiple ends, one of which extends to the outside of the house 11. A connector 21 is provided at the end outside the house 11. The charging/discharging device 30 can be connected to the connector 21. More specifically, a plug 31 provided on the charging/discharging device 30 can be inserted into the connector 21.
　充放電装置３０は、電動車４０に接続するためのプラグ３２を有する。プラグ３２は、電動車４０に設けられたインレットに差し込むことができる。プラグ３１をコネクタ２１に接続し、プラグ３２を電動車４０に接続することにより、充放電装置３０は、電動車４０の車載バッテリの充放電を行うことができる。 The charging/discharging device 30 has a plug 32 for connecting to the electric vehicle 40. The plug 32 can be inserted into an inlet provided on the electric vehicle 40. By connecting the plug 31 to the connector 21 and connecting the plug 32 to the electric vehicle 40, the charging/discharging device 30 can charge and discharge the on-board battery of the electric vehicle 40.
　充放電装置３０は、無線通信機能を有し、無線通信を行うことが可能である。 The charging/discharging device 30 has a wireless communication function and is capable of wireless communication.
　電気配線２０は、分電盤２２を介して電力線２３に接続されている。電力線２３は、系統電源に接続されている。 The electrical wiring 20 is connected to a power line 23 via a distribution board 22. The power line 23 is connected to a system power supply.
　分電盤２２において、電気配線２０は分岐している。電気配線２０には、テレビ、冷蔵庫、洗濯機、照明、エアコン等の電力を消費する負荷６０が接続されている。 The electrical wiring 20 branches out at the distribution board 22. Loads 60 that consume electricity, such as televisions, refrigerators, washing machines, lighting, and air conditioners, are connected to the electrical wiring 20.
　分電盤２２には、電力計測部２２１及び２２２が設けられている。 The distribution board 22 is provided with power measurement units 221 and 222.
　電力計測部２２１は、充放電装置３０が接続されるコネクタ２１へ延びる電力線に取り付けられている。電力計測部２２１は、電圧センサ２２１Ｖ及び電流センサ２２１Ａを含む。電力計測部２２１は、充放電装置３０に供給される電力又は充放電装置３０から出力される電力を計測する。すなわち、電力計測部２２１は、充放電装置３０による充放電電力を計測する。より詳細には、電圧センサ２２１Ｖは、充放電装置３０による充放電電圧を計測し、電流センサ２２１Ａは、充放電装置３０による充放電電流を計測する。電圧センサ２２１Ｖによって計測される電圧値及び電流センサ２２１Ａによって計測される電流値に基づいて、充放電電力が算出される。充放電電力の算出は、例えば、電力計測部２２１に設けられた図示しないプロセッサによって行われる。 The power measurement unit 221 is attached to a power line extending to the connector 21 to which the charging/discharging device 30 is connected. The power measurement unit 221 includes a voltage sensor 221V and a current sensor 221A. The power measurement unit 221 measures the power supplied to the charging/discharging device 30 or the power output from the charging/discharging device 30. That is, the power measurement unit 221 measures the charging/discharging power by the charging/discharging device 30. More specifically, the voltage sensor 221V measures the charging/discharging voltage by the charging/discharging device 30, and the current sensor 221A measures the charging/discharging current by the charging/discharging device 30. The charging/discharging power is calculated based on the voltage value measured by the voltage sensor 221V and the current value measured by the current sensor 221A. The charging/discharging power is calculated, for example, by a processor (not shown) provided in the power measurement unit 221.
　電力計測部２２２は、負荷６０へ延びる電力線に取り付けられている。電力計測部２２２は、電圧センサ２２２Ｖ及び電流センサ２２２Ａを含む。電力計測部２２２は、負荷６０に供給される電力を計測する。すなわち、電力計測部２２２は、負荷６０による使用電力を計測する。より詳細には、電圧センサ２２２Ｖは、負荷６０に印加される電圧（以下、「負荷電圧」ともいう）を計測し、電流センサ２２２Ａは、負荷６０に供給される電流（以下、「負荷電流」ともいう）を計測する。電圧センサ２２２Ｖによって計測される電圧値及び電流センサ２２２Ａによって計測される電流値に基づいて、負荷６０の使用電力が算出される。例えば、電力値は、電圧値×電流値×力率（電流と電圧との位相差）によって算出される。使用電力の算出は、例えば、電力計測部２２２に設けられた図示しないプロセッサによって行われる。 The power measurement unit 222 is attached to a power line extending to the load 60. The power measurement unit 222 includes a voltage sensor 222V and a current sensor 222A. The power measurement unit 222 measures the power supplied to the load 60. That is, the power measurement unit 222 measures the power used by the load 60. More specifically, the voltage sensor 222V measures the voltage applied to the load 60 (hereinafter also referred to as the "load voltage"), and the current sensor 222A measures the current supplied to the load 60 (hereinafter also referred to as the "load current"). The power used by the load 60 is calculated based on the voltage value measured by the voltage sensor 222V and the current value measured by the current sensor 222A. For example, the power value is calculated by the voltage value x current value x power factor (phase difference between the current and the voltage). The calculation of the power used is performed, for example, by a processor (not shown) provided in the power measurement unit 222.
　住宅１１には、太陽光発電装置７０が配置されている。太陽光発電装置７０は、例えば屋根など、日中に太陽光を受光できる位置に配置される。太陽光発電装置７０によって発電された電力は、バッテリ８０に蓄電される。太陽光発電装置７０及びバッテリ８０は、電力変換装置９０に接続されている。電力変換装置９０は、太陽光発電装置７０から出力される直流電力を電圧変換し、所定電圧の直流電力を出力することができる。電力変換装置９０からの出力電力はバッテリ８０に供給され、バッテリ８０が充電される。 A solar power generation device 70 is placed in the house 11. The solar power generation device 70 is placed in a position where it can receive sunlight during the day, such as on the roof. The power generated by the solar power generation device 70 is stored in a battery 80. The solar power generation device 70 and the battery 80 are connected to a power conversion device 90. The power conversion device 90 can convert the voltage of the DC power output from the solar power generation device 70 and output DC power of a predetermined voltage. The output power from the power conversion device 90 is supplied to the battery 80, which charges the battery 80.
　電力変換装置９０は、電気配線２０に接続されている。電力変換装置９０は、バッテリ８０から放電される直流電力を変換し、電気配線２０へ出力することができる。さらに電力変換装置９０は、例えば夜間等の太陽光発電装置７０が発電をしていない時間帯において、系統電源から供給される交流電力を直流電力へ変換し、バッテリ８０を充電することができる。 The power conversion device 90 is connected to the electrical wiring 20. The power conversion device 90 can convert the DC power discharged from the battery 80 and output it to the electrical wiring 20. Furthermore, during times when the solar power generation device 70 is not generating power, such as at night, the power conversion device 90 can convert the AC power supplied from the system power supply into DC power and charge the battery 80.
　系統電源に接続される電力線２３には、スマートメータ５０が取り付けられている。スマートメータ５０は、通信機能を有する電力計測装置である。具体的には、スマートメータ５０は、電力計測部５１と無線通信部５２とを含む。電力計測部５１は、電力線２３における電力を計測する。電力計測部５１は、「基準計測部」の一例である。 A smart meter 50 is attached to the power line 23 connected to the system power supply. The smart meter 50 is a power measurement device with a communication function. Specifically, the smart meter 50 includes a power measurement unit 51 and a wireless communication unit 52. The power measurement unit 51 measures the power on the power line 23. The power measurement unit 51 is an example of a "reference measurement unit."
　電力計測部５１は、電圧センサ５１Ｖと、電流センサ５１Ａとを含む。電圧センサ５１Ｖは、電力線２３における電圧を計測する。電圧センサ５１Ｖは、「基準電圧センサ」の一例である。電流センサ５１Ａは、電力線２３における電流を計測する。電流センサ５１Ａは、「基準電流センサ」の一例である。電圧センサ５１Ｖによって計測される電圧値及び電流センサ５１Ａによって計測される電流値に基づいて、電力が算出される。例えば、電力値は、電圧値×電流値×力率によって算出される。電力の算出は、例えば、電力計測部５１に設けられた図示しないプロセッサによって行われる。 The power measurement unit 51 includes a voltage sensor 51V and a current sensor 51A. The voltage sensor 51V measures the voltage on the power line 23. The voltage sensor 51V is an example of a "reference voltage sensor." The current sensor 51A measures the current on the power line 23. The current sensor 51A is an example of a "reference current sensor." Power is calculated based on the voltage value measured by the voltage sensor 51V and the current value measured by the current sensor 51A. For example, the power value is calculated by voltage value x current value x power factor. The power is calculated, for example, by a processor (not shown) provided in the power measurement unit 51.
　無線通信部５２は、例えば、無線通信規格であるIEEE802.11に準拠した無線ＬＡＮ（Local Area Network）用の通信インタフェースである。スマートメータ５０は、電圧センサ５１Ｖ及び電流センサ５１Ａによって計測された電圧値及び電流値を含む基準計測情報を、無線通信部５２によって無線送信することができる。 The wireless communication unit 52 is, for example, a communication interface for a wireless LAN (Local Area Network) that complies with the wireless communication standard IEEE802.11. The smart meter 50 can wirelessly transmit reference measurement information including the voltage value and current value measured by the voltage sensor 51V and the current sensor 51A via the wireless communication unit 52.
　管理装置１００は、無線通信機２００に接続されている。無線通信機２００は、例えば、IEEE802.11に準拠した通信装置である。無線通信機２００は、例えば、無線ＬＡＮのアクセスポイントであり、スマートメータ５０及び充放電装置３０と無線通信を行うことができる。例えば、無線通信機２００は、ルータとしての機能を有し、インターネット上のサーバ等とも通信することができる。 The management device 100 is connected to a wireless communication device 200. The wireless communication device 200 is, for example, a communication device that complies with IEEE802.11. The wireless communication device 200 is, for example, a wireless LAN access point, and can perform wireless communication with the smart meter 50 and the charging/discharging device 30. For example, the wireless communication device 200 has a function as a router, and can also communicate with servers on the Internet, etc.
　管理装置１００と無線通信機２００とは、例えば無線通信又は有線通信を行うことができる。例えば、無線通信機２００は、イーサネット（登録商標）インタフェースを含み、ＴＣＰ／ＩＰ（Transmission Control Protocol/Internet Protocol）等の通信プロトコルを使用して、管理装置１００と通信を行うことができる。無線通信機２００は、管理装置１００と、スマートメータ５０及び充放電装置３０との間の通信を中継する。 The management device 100 and the wireless communication device 200 can perform, for example, wireless communication or wired communication. For example, the wireless communication device 200 includes an Ethernet (registered trademark) interface and can communicate with the management device 100 using a communication protocol such as TCP/IP (Transmission Control Protocol/Internet Protocol). The wireless communication device 200 relays communication between the management device 100 and the smart meter 50 and the charging/discharging device 30.
　管理装置１００は、電気配線２０に接続された負荷６０の使用電力及び充放電装置３０による充放電電力を管理する。例えば、管理装置１００は、ＨＥＭＳ（Home Energy Management System）コントローラである。 The management device 100 manages the power used by the load 60 connected to the electrical wiring 20 and the power charged and discharged by the charge/discharge device 30. For example, the management device 100 is a Home Energy Management System (HEMS) controller.
　管理装置１００は、太陽光発電装置７０によって発電される電力を管理したり、バッテリ８０に蓄積される電力を管理したりすることもできる。 The management device 100 can also manage the power generated by the solar power generation device 70 and the power stored in the battery 80.
　図２は、実施形態に係る電力変換装置の構成の一例を示すブロック図である。 FIG. 2 is a block diagram showing an example of the configuration of a power conversion device according to an embodiment.
　管理装置１００は電力変換装置９０に信号線によって接続されており、電力変換装置９０を制御する。管理装置１００は、電力変換装置９０を制御することによって、以下のようなエネルギーマネジメントを行うことができる。 The management device 100 is connected to the power conversion device 90 via a signal line and controls the power conversion device 90. By controlling the power conversion device 90, the management device 100 can perform the following energy management.
　電力変換装置９０は、昇圧型ＤＣ／ＤＣコンバータ９１と、双方向ＡＣ／ＤＣコンバータ９２と、双方向ＤＣ／ＤＣコンバータ９３とを含む。昇圧型ＤＣ／ＤＣコンバータ９１は、太陽光発電装置７０に電力線によって接続されており、太陽光発電装置７０から入力される直流電力を昇圧し、昇圧された直流電力を出力する。 The power conversion device 90 includes a step-up DC/DC converter 91, a bidirectional AC/DC converter 92, and a bidirectional DC/DC converter 93. The step-up DC/DC converter 91 is connected to the solar power generation device 70 via a power line, boosts the DC power input from the solar power generation device 70, and outputs the boosted DC power.
　昇圧型ＤＣ／ＤＣコンバータ９１からの出力電力は、双方向ＤＣ／ＤＣコンバータ９３に入力される。双方向ＤＣ／ＤＣコンバータ９３は、入力された直流電力の電圧を変換する。双方向ＤＣ／ＤＣコンバータ９３は、バッテリ８０に電力線によって接続されており、電圧変換後の直流電力をバッテリ８０に出力し、バッテリ８０を充電する。 The output power from the step-up DC/DC converter 91 is input to the bidirectional DC/DC converter 93. The bidirectional DC/DC converter 93 converts the voltage of the input DC power. The bidirectional DC/DC converter 93 is connected to the battery 80 by a power line, and outputs the voltage-converted DC power to the battery 80, thereby charging the battery 80.
　上記のように、管理装置１００は、電力変換装置９０を制御し、日中に太陽光発電装置７０によって発電された電力をバッテリ８０に充電する。 As described above, the management device 100 controls the power conversion device 90 and charges the battery 80 with the electricity generated by the solar power generation device 70 during the day.
　双方向ＡＣ／ＤＣコンバータ９２は、電気配線２０に接続されており、系統電源からの交流電力が電気配線２０から入力可能である。双方向ＡＣ／ＤＣコンバータ９２は、入力された交流電力を直流電力に変換する。双方向ＡＣ／ＤＣコンバータ９２からは、変換後の直流電力が双方向ＤＣ／ＤＣコンバータ９３に入力される。双方向ＤＣ／ＤＣコンバータ９３は、双方向ＡＣ／ＤＣコンバータ９２から入力された直流電力の電圧を変換し、電圧変換後の直流電力をバッテリ８０に出力し、バッテリ８０を充電する。 The bidirectional AC/DC converter 92 is connected to the electrical wiring 20, and AC power from the system power supply can be input from the electrical wiring 20. The bidirectional AC/DC converter 92 converts the input AC power into DC power. The converted DC power is input from the bidirectional AC/DC converter 92 to the bidirectional DC/DC converter 93. The bidirectional DC/DC converter 93 converts the voltage of the DC power input from the bidirectional AC/DC converter 92, and outputs the voltage-converted DC power to the battery 80, thereby charging the battery 80.
　管理装置１００は、例えば夜間、天候不良時等の太陽光発電装置７０による発電に適していない時間帯において、電力変換装置９０を制御し、系統電源から供給される電力をバッテリ８０に蓄えることができる。 The management device 100 can control the power conversion device 90 and store the power supplied from the grid power supply in the battery 80 during times when power generation by the solar power generation device 70 is not suitable, such as at night or during bad weather.
　さらに電力変換装置９０は、バッテリ８０を放電させることができる。双方向ＤＣ／ＤＣコンバータ９３は、バッテリ８０から出力される直流電力を変換し、電圧変換後の直流電力を双方向ＡＣ／ＤＣコンバータ９２へ出力する。双方向ＡＣ／ＤＣコンバータ９２は、入力された直流電力を交流電力へ変換し、交流電力を電気配線２０へ出力する。 Furthermore, the power conversion device 90 can discharge the battery 80. The bidirectional DC/DC converter 93 converts the DC power output from the battery 80, and outputs the voltage-converted DC power to the bidirectional AC/DC converter 92. The bidirectional AC/DC converter 92 converts the input DC power to AC power, and outputs the AC power to the electrical wiring 20.
　管理装置１００は、バッテリ８０の残電力量が十分である場合に、バッテリ８０に蓄えられた電力の一部を電気配線２０から系統電源へ逆潮流することができる。 When the remaining power in the battery 80 is sufficient, the management device 100 can reverse-flow a portion of the power stored in the battery 80 from the electrical wiring 20 to the system power supply.
　バッテリ８０は、住宅１１において使用される。例えば、系統電源からの電力に代えて、バッテリ８０に蓄えられた電力を電気配線２０を通じて負荷６０へ供給したり、充放電装置３０に供給し、電動車４０の充電を行ったりすることもできる。 The battery 80 is used in the house 11. For example, instead of power from a power grid, the power stored in the battery 80 can be supplied to the load 60 via the electrical wiring 20, or to the charging/discharging device 30 to charge the electric vehicle 40.
　管理装置１００は、住宅１１内に配置されている。管理装置１００は、例えば住宅１１の住人であるユーザによって操作される。管理装置１００は、入力装置及び表示装置を含む。管理者は、入力装置を用いて管理装置１００に情報を入力し、表示装置によって住宅１１全体の電力運用状況を監視することができる。 The management device 100 is placed in the house 11. The management device 100 is operated by a user who is, for example, a resident of the house 11. The management device 100 includes an input device and a display device. The administrator can input information into the management device 100 using the input device and monitor the power operation status of the entire house 11 using the display device.
［２．充放電装置］
　図３は、実施形態に係る充放電装置のハードウェア構成の一例を示すブロック図である。充放電装置３０は、電力変換回路３０１と、制御回路３０２と、通信インタフェース（通信Ｉ／Ｆ）３０３と、無線通信Ｉ／Ｆ３０４とを含む。 [2. Charging and discharging device]
3 is a block diagram showing an example of a hardware configuration of the charging/discharging device according to the embodiment. The charging/discharging device 30 includes a power conversion circuit 301, a control circuit 302, and a communication interface (communication I/F) 303. and a wireless communication I/F 304.
　電力変換回路３０１は、電力線を通じてプラグ３１に接続されている。プラグ３１は、コネクタ２１に接続可能である。電力変換回路３０１は、電力線を通じてプラグ３２に接続されている。プラグ３２は、電動車４０に接続可能である。 The power conversion circuit 301 is connected to the plug 31 via a power line. The plug 31 can be connected to the connector 21. The power conversion circuit 301 is connected to the plug 32 via a power line. The plug 32 can be connected to the electric vehicle 40.
　電動車４０は、車載バッテリ４０１と、車載制御装置４０２と、インレット４０３とを含む。 The electric vehicle 40 includes an on-board battery 401, an on-board control device 402, and an inlet 403.
　車載バッテリ４０１は、電動車４０を推進するためのモータ（図示せず）に電力を供給する駆動用モータである。 The on-board battery 401 is a drive motor that supplies power to a motor (not shown) for propelling the electric vehicle 40.
　車載制御装置４０２は、充放電装置３０とともに、車載バッテリ４０１の充放電の制御を行うことができる。すなわち、車載制御装置４０２は、充放電装置３０の制御回路３０２と通信を行い、車載バッテリ４０１の充放電を実行する。 The on-board control device 402, together with the charge/discharge device 30, can control the charging and discharging of the on-board battery 401. That is, the on-board control device 402 communicates with the control circuit 302 of the charge/discharge device 30 and performs charging and discharging of the on-board battery 401.
　インレット４０３は、プラグ３２に接続可能なソケット（図示せず）を含む。インレット４０３は、電力線によって車載バッテリ４０１に接続されている。インレット４０３は、通信線によって車載制御装置４０２に接続されている。 The inlet 403 includes a socket (not shown) that can be connected to the plug 32. The inlet 403 is connected to the vehicle battery 401 by a power line. The inlet 403 is connected to the vehicle control device 402 by a communication line.
　図４は、充放電装置における電力変換回路の構成の一例を示す回路図である。電力変換回路３０１は、双方向ＡＣ／ＤＣコンバータ３１１と、双方向ＡＣ／ＤＣコンバータ３１２と、双方向ＡＣ／ＤＣコンバータ３１３と、変圧器３１４と、電力計測部３３とを含む。 FIG. 4 is a circuit diagram showing an example of the configuration of a power conversion circuit in a charging/discharging device. The power conversion circuit 301 includes a bidirectional AC/DC converter 311, a bidirectional AC/DC converter 312, a bidirectional AC/DC converter 313, a transformer 314, and a power measurement unit 33.
　双方向ＡＣ／ＤＣコンバータ３１１は、プラグ３１から延びる電力線に接続されている。双方向ＡＣ／ＤＣコンバータ３１１は、双方向ＡＣ／ＤＣコンバータ３１２に接続されている。双方向ＡＣ／ＤＣコンバータ３１２と双方向ＡＣ／ＤＣコンバータ３１３とは、変圧器３１４を介して接続されている。双方向ＡＣ／ＤＣコンバータ３１３は、プラグ３２から延びる電力線に接続されている。 The bidirectional AC/DC converter 311 is connected to a power line extending from the plug 31. The bidirectional AC/DC converter 311 is connected to the bidirectional AC/DC converter 312. The bidirectional AC/DC converter 312 and the bidirectional AC/DC converter 313 are connected via a transformer 314. The bidirectional AC/DC converter 313 is connected to a power line extending from the plug 32.
　双方向ＡＣ／ＤＣコンバータ３１１，３１２，３１３のそれぞれは、例えば、複数（４つ）のスイッチング素子を含むフルブリッジ回路である。スイッチング素子は、例えば、ＩＧＢＴ（絶縁ゲート型バイポーラトランジスタ）、パワーＭＯＳＦＥＴ（Metal-Oxide-Semiconductor Field Effect Transistor）等のパワー半導体素子である。 Each of the bidirectional AC/ DC converters 311, 312, and 313 is, for example, a full-bridge circuit including multiple (four) switching elements. The switching elements are, for example, power semiconductor elements such as IGBTs (insulated gate bipolar transistors) and power MOSFETs (metal-oxide-semiconductor field effect transistors).
　車載バッテリ４０１を充電する場合、電力変換回路３０１は、プラグ３１から入力された交流電力を直流電力に変換し、プラグ３２へ直流電力を出力する。具体的には、双方向ＡＣ／ＤＣコンバータ３１１は整流平滑回路として機能し、入力された交流電力を直流電力へ変換する。双方向ＡＣ／ＤＣコンバータ３１２は、ＤＣ／ＡＣコンバータとして機能し、スイッチング動作によって直流電力を交流電力へ変換する。変圧器３１４は交流電力の電圧を変換する。双方向ＡＣ／ＤＣコンバータ３１３は整流平滑回路として機能し、電圧変換後の交流電力を直流電力へ変換する。 When charging the vehicle battery 401, the power conversion circuit 301 converts the AC power input from the plug 31 into DC power and outputs the DC power to the plug 32. Specifically, the bidirectional AC/DC converter 311 functions as a rectifying and smoothing circuit, and converts the input AC power into DC power. The bidirectional AC/DC converter 312 functions as a DC/AC converter, and converts the DC power into AC power by switching operations. The transformer 314 converts the voltage of the AC power. The bidirectional AC/DC converter 313 functions as a rectifying and smoothing circuit, and converts the AC power after voltage conversion into DC power.
　車載バッテリ４０１を放電させる場合、電力変換回路３０１は、プラグ３２から入力された直流電力を交流電力に変換し、プラグ３１へ交流電力を出力する。具体的には、双方向ＡＣ／ＤＣコンバータ３１３はＤＣ／ＡＣコンバータとして機能し、スイッチング動作によって直流電力を交流電力へ変換する。変圧器３１４は交流電力の電圧を変換する。双方向ＡＣ／ＤＣコンバータ３１２は整流平滑回路として機能し、電圧変換後の交流電力を直流電力へ変換する。双方向ＡＣ／ＤＣコンバータ３１３はＤＣ／ＡＣコンバータとして機能し、スイッチング動作によって直流電力を交流電力へ変換する。 When discharging the in-vehicle battery 401, the power conversion circuit 301 converts the DC power input from the plug 32 into AC power and outputs the AC power to the plug 31. Specifically, the bidirectional AC/DC converter 313 functions as a DC/AC converter and converts the DC power into AC power by switching operations. The transformer 314 converts the voltage of the AC power. The bidirectional AC/DC converter 312 functions as a rectifying and smoothing circuit and converts the AC power after voltage conversion into DC power. The bidirectional AC/DC converter 313 functions as a DC/AC converter and converts the DC power into AC power by switching operations.
　電力計測部３３は、双方向ＡＣ／ＤＣコンバータ３１１からプラグ３１へ延びる電力線に取り付けられている。電力計測部３３は、プラグ３１を通じて充放電装置３０に供給される電力又は充放電装置３０から出力される電力を計測する。すなわち、電力計測部３３は、充放電装置３０による充放電電力を計測する。電力計測部３３は、「対象計測部」の一例である。 The power measurement unit 33 is attached to the power line extending from the bidirectional AC/DC converter 311 to the plug 31. The power measurement unit 33 measures the power supplied to the charge/discharge device 30 through the plug 31 or the power output from the charge/discharge device 30. In other words, the power measurement unit 33 measures the charging/discharging power by the charge/discharge device 30. The power measurement unit 33 is an example of a "target measurement unit."
　より詳細には、電力計測部３３は、電圧センサ３３Ｖ及び電流センサ３３Ａを含む。電圧センサ３３Ｖは、充放電装置３０による充放電電圧を計測する。電圧センサ３３Ｖは、「対象電圧センサ」の一例である。電流センサ３３Ａは、充放電装置３０による充放電電流を計測する。電流センサ３３Ａは、「対象電流センサ」の一例である。電圧センサ３３Ｖによって計測される電圧値及び電流センサ３３Ａによって計測される電流値に基づいて、充放電電力が算出される。例えば、電力値は、電圧値×電流値×力率によって算出される。充放電電力の算出は、例えば、電力計測部３３に設けられた図示しないプロセッサ又は制御回路３０２によって行われる。 More specifically, the power measurement unit 33 includes a voltage sensor 33V and a current sensor 33A. The voltage sensor 33V measures the charging/discharging voltage of the charging/discharging device 30. The voltage sensor 33V is an example of a "target voltage sensor." The current sensor 33A measures the charging/discharging current of the charging/discharging device 30. The current sensor 33A is an example of a "target current sensor." The charging/discharging power is calculated based on the voltage value measured by the voltage sensor 33V and the current value measured by the current sensor 33A. For example, the power value is calculated by voltage value x current value x power factor. The charging/discharging power is calculated, for example, by a processor or control circuit 302 (not shown) provided in the power measurement unit 33.
　図３に戻り、制御回路３０２は電力変換回路３０１に接続されている。制御回路３０２は、例えば、プロセッサ、メモリ等から構成されている。制御回路３０２は、電力変換回路３０１のスイッチング動作を制御することにより、電力変換回路３０１に充電機能と放電機能とを選択的に実行させることができる。 Returning to FIG. 3, the control circuit 302 is connected to the power conversion circuit 301. The control circuit 302 is composed of, for example, a processor, a memory, etc. The control circuit 302 controls the switching operation of the power conversion circuit 301, thereby allowing the power conversion circuit 301 to selectively perform a charging function and a discharging function.
　通信Ｉ／Ｆ３０３は、プラグ３２から延びる通信線に接続されている。プラグ３２がインレット４０３に接続されると、通信Ｉ／Ｆ３０３は、車載制御装置４０２と通信線で接続される。通信Ｉ／Ｆ３０３は、車載制御装置４０２との通信に用いられる。通信Ｉ／Ｆ３０３は、特定の通信プロトコル、例えば、ＣＡＮ（Controller Area Network）による通信を行うことができる。 The communication I/F 303 is connected to a communication line extending from the plug 32. When the plug 32 is connected to the inlet 403, the communication I/F 303 is connected to the vehicle control device 402 via a communication line. The communication I/F 303 is used for communication with the vehicle control device 402. The communication I/F 303 can communicate using a specific communication protocol, for example, CAN (Controller Area Network).
　無線通信Ｉ／Ｆ３０４は、充放電管理装置１００との通信に用いられる。無線通信Ｉ／Ｆ３０４は、例えば、IEEE802.11に準拠した通信インタフェースである。無線通信Ｉ／Ｆ３０４は、特定の通信プロトコル、例えばＴＣＰ／ＩＰによる通信を行うことができる。 The wireless communication I/F 304 is used for communication with the charge/discharge management device 100. The wireless communication I/F 304 is, for example, a communication interface that complies with IEEE802.11. The wireless communication I/F 304 can communicate using a specific communication protocol, for example TCP/IP.
［３．管理装置のハードウェア構成］
　図５は、実施形態に係る管理装置のハードウェア構成の一例を示すブロック図である。管理装置１００は、プロセッサ１０１と、不揮発性メモリ１０２と、揮発性メモリ１０３と、入力装置１０４と、表示装置１０５と、通信Ｉ／Ｆ１０６とを含む。 3. Hardware configuration of management device
5 is a block diagram showing an example of a hardware configuration of a management device according to an embodiment. The management device 100 includes a processor 101, a non-volatile memory 102, a volatile memory 103, an input device 104, a display device 105, and a communication I/F 106.
　揮発性メモリ１０３は、例えばＳＲＡＭ（Static Random Access Memory）、ＤＲＡＭ（Dynamic Random Access Memory）等の半導体メモリである。不揮発性メモリ１０２は、例えばフラッシュメモリ、ハードディスク、ＲＯＭ（Read Only Memory）等である。不揮発性メモリ１０２には、コンピュータプログラムである管理プログラム１１０及び管理プログラム１１０の実行に使用されるデータが格納される。管理装置１００の各機能は、管理プログラム１１０がプロセッサ１０１によって実行されることで発揮される。管理プログラム１１０は、フラッシュメモリ、ＲＯＭ、ＣＤ－ＲＯＭなどの記録媒体に記憶させることができる。プロセッサ１０１は、管理プログラム１１０によって、充放電装置３０の電力計測部３３による電力計測精度を管理する。 The volatile memory 103 is, for example, a semiconductor memory such as SRAM (Static Random Access Memory) or DRAM (Dynamic Random Access Memory). The non-volatile memory 102 is, for example, a flash memory, a hard disk, or a ROM (Read Only Memory). The non-volatile memory 102 stores a management program 110, which is a computer program, and data used to execute the management program 110. Each function of the management device 100 is achieved by the processor 101 executing the management program 110. The management program 110 can be stored in a recording medium such as a flash memory, a ROM, or a CD-ROM. The processor 101 manages the accuracy of power measurement by the power measurement unit 33 of the charging/discharging device 30 using the management program 110.
　プロセッサ１０１は、例えばＣＰＵ（Central Processing Unit）である。ただし、プロセッサ１０１は、ＣＰＵに限られない。プロセッサ１０１は、ＧＰＵ（Graphics Processing Unit）であってもよい。プロセッサ１０１は、例えば、マルチコアプロセッサである。プロセッサ１０１は、シングルコアプロセッサであってもよい。プロセッサ１０１は、例えば、ＡＳＩＣ（Application Specific Integrated Circuit）であってもよいし、ゲートアレイ、ＦＰＧＡ（Field Programmable Gate Array）等のプログラマブルロジックデバイスであってもよい。この場合、ＡＳＩＣ又はプログラマブルロジックデバイスは、管理プログラム１１０と同一の処理を実行可能に構成される。 The processor 101 is, for example, a CPU (Central Processing Unit). However, the processor 101 is not limited to a CPU. The processor 101 may be a GPU (Graphics Processing Unit). The processor 101 is, for example, a multi-core processor. The processor 101 may be a single-core processor. The processor 101 may be, for example, an ASIC (Application Specific Integrated Circuit), or a programmable logic device such as a gate array or an FPGA (Field Programmable Gate Array). In this case, the ASIC or programmable logic device is configured to be capable of executing the same processing as the management program 110.
　不揮発性メモリ１０２には、統計データベース（以下、「統計ＤＢ」という）１１１が設けられている。統計ＤＢ１１１は、住宅１１における使用電力の統計値が記憶されている。さらに具体的には、統計ＤＢ１１１は、１年における複数の時期、例えば、春期（４月～６月）、夏期（７月～９月）、秋期（１０月～１２月）、冬期（１月～３月）毎の使用電力の統計値を格納する。１年における時期毎に、住宅１１におけるユーザの生活パターンは変化する。例えば、春期及び秋期においては、ユーザはエアコンを使用せず、夏期においては、ユーザはエアコンを使用する。例えば、冬期においては、ユーザはエアコン及び電気ヒーター等の暖房器具を使用する。住宅１１での使用電力はユーザの生活パターンに応じて変化するため、時期毎に決まった傾向を示す。統計ＤＢ１１１には、このような時期毎に異なる使用電力の統計値が格納されている。 The non-volatile memory 102 is provided with a statistical database (hereinafter, "statistical DB") 111. The statistical DB 111 stores statistical values of power usage in the house 11. More specifically, the statistical DB 111 stores statistical values of power usage for multiple periods of the year, for example, spring (April to June), summer (July to September), autumn (October to December), and winter (January to March). The lifestyle patterns of users in the house 11 change for each period of the year. For example, in spring and autumn, users do not use air conditioners, and in summer, users use air conditioners. For example, in winter, users use air conditioners and heating appliances such as electric heaters. Power usage in the house 11 changes according to the lifestyle patterns of users, and therefore shows a fixed trend for each period. The statistical DB 111 stores statistical values of power usage that differ for each period.
　使用電力の統計値は、１つの時期の全体における使用電力量ではなく、使用電力の瞬時値である。統計値は、例えば平均値である。他の例として、統計値は中央値であってもよい。さらに他の例として、統計値は最頻値であってもよい。すなわち、統計値は、代表値であってもよい。 The statistical value of power usage is not the total amount of power usage during a period of time, but an instantaneous value of power usage. The statistical value is, for example, an average value. As another example, the statistical value may be a median. As yet another example, the statistical value may be a mode. In other words, the statistical value may be a representative value.
　例えば、系統電源に接続された電力線２３における電圧値と、電気配線２０における電圧値は同一である。すなわち、充放電装置３０のプラグ３１から延びる電力線に印加される電圧は、電力線２３における電圧と同じである。この場合、統計ＤＢ１１１に記憶される時期毎の使用電力の統計値は、住宅１１における時期毎の使用電流の統計値としてもよい。 For example, the voltage value in the power line 23 connected to the system power supply is the same as the voltage value in the electrical wiring 20. In other words, the voltage applied to the power line extending from the plug 31 of the charging/discharging device 30 is the same as the voltage in the power line 23. In this case, the statistical value of the power usage for each period stored in the statistical DB 111 may be the statistical value of the current usage for each period in the house 11.
　例えば、入力装置１０４は、キーボード及びマウス等のポインティングデバイスを含む。入力装置１０４は、表示装置１０５の画面に重ねられた静電容量式又は感圧式のタッチパッドであってもよい。入力装置１０４は、管理装置１００へのデータの入力に用いられる。 For example, the input device 104 includes a keyboard and a pointing device such as a mouse. The input device 104 may be a capacitive or pressure-sensitive touch pad overlaid on the screen of the display device 105. The input device 104 is used to input data to the management device 100.
　表示装置１０５は、例えば液晶パネル又はＯＥＬ（有機エレクトロルミネッセンス）パネルを含む。表示装置１０５は、文字又は図形の情報を表示することができる。 The display device 105 includes, for example, a liquid crystal panel or an OEL (organic electroluminescence) panel. The display device 105 can display text or graphic information.
　通信Ｉ／Ｆ１０６は、充放電装置３０との通信に用いられる。通信Ｉ／Ｆ１０６は、例えば有線通信インタフェースであり、無線通信機２００と信号線によって接続される。通信Ｉ／Ｆ１０６は、無線通信インタフェースであってもよい。通信Ｉ／Ｆ１０６は、特定の通信プロトコル、例えばＴＣＰ／ＩＰによる通信を行うことができる。 The communication I/F 106 is used for communication with the charging/discharging device 30. The communication I/F 106 is, for example, a wired communication interface, and is connected to the wireless communication device 200 via a signal line. The communication I/F 106 may be a wireless communication interface. The communication I/F 106 can communicate using a specific communication protocol, for example TCP/IP.
［４．計測精度管理システムの機能］
　電動車４０の車載バッテリ４０１を分散型電源の１つとして使用する場合、住宅１１の住人であるユーザは、車載バッテリ４０１から放電される電力をアグリゲータと取引する。この取引において、充放電装置３０の電力計測部３３による放電電力の計測値が用いられる。電力計測部３３の計測精度が一定の基準を満たしていなければ、適切な電力取引を行うことができない。このため、計測精度管理システム１０は、充放電装置３０における電力計測の精度を管理する。 [4. Functions of the measurement accuracy control system]
When the on-board battery 401 of the electric vehicle 40 is used as one of the distributed power sources, the user who is a resident of the house 11 trades the power discharged from the on-board battery 401 with the aggregator. In this transaction, the measurement value of the discharged power by the power measurement unit 33 of the charging/discharging device 30 is used. If the measurement accuracy of the power measurement unit 33 does not meet a certain standard, appropriate power trading cannot be performed. For this reason, the measurement accuracy management system 10 manages the accuracy of the power measurement in the charging/discharging device 30.
　図６は、実施形態に係る計測精度管理システムの機能の一例を示す機能ブロック図である。 FIG. 6 is a functional block diagram showing an example of the functions of a measurement accuracy management system according to an embodiment.
　スマートメータ５０は、送信部５１０の機能を有する。 The smart meter 50 has the functionality of a transmission unit 510.
　プロセッサ１０１が管理プログラム１１０を実行することにより、管理装置１００は、計測指示部１１１と、第１取得部１１２と、第２取得部１１３と、算出部１１４と、判定部１１５と、キャリブレーション実行指示部１１６と、通知処理部１１７と、出力部１１８として機能する。 When the processor 101 executes the management program 110, the management device 100 functions as a measurement instruction unit 111, a first acquisition unit 112, a second acquisition unit 113, a calculation unit 114, a determination unit 115, a calibration execution instruction unit 116, a notification processing unit 117, and an output unit 118.
　充放電装置３０は、充放電制御部３２１と、計測値取得部３２２と、送信部３２３と、受信部３２４と、キャリブレーション実行部３２５と、通知要求部３２６との各機能を有する。 The charging/discharging device 30 has the functions of a charging/discharging control unit 321, a measurement value acquisition unit 322, a transmission unit 323, a reception unit 324, a calibration execution unit 325, and a notification request unit 326.
　計測指示部１１１は、充放電装置３０へ電力計測を指示する。 The measurement instruction unit 111 instructs the charge/discharge device 30 to measure power.
　充放電制御部３２１は、計測指示部１１１からの電力計測の指示を受けると、車載バッテリ４０１の放電、充電、又は充放電を行う。具体的には、電力計測の指示をトリガーとして、電力変換回路３０１を制御し、車載バッテリ４０１の充電、放電、又は充放電を開始する。車載バッテリ４０１の充電、放電、又は充放電は、特定のパターン（以下、「判定用パターン」という）で行われる。判定用パターンは、例えば、電圧パターンである。判定用パターンは、電流パターンであってもよいし、電圧パターンと電流パターンの両方であってもよい。 When the charge/discharge control unit 321 receives an instruction to measure power from the measurement instruction unit 111, it discharges, charges, or charges/discharges the in-vehicle battery 401. Specifically, the instruction to measure power is used as a trigger to control the power conversion circuit 301, and starts charging, discharging, or charging/discharging the in-vehicle battery 401. Charging, discharging, or charging/discharging the in-vehicle battery 401 is performed in a specific pattern (hereinafter referred to as a "determination pattern"). The determination pattern is, for example, a voltage pattern. The determination pattern may be a current pattern, or both a voltage pattern and a current pattern.
　例えば、判定用パターンは、車載バッテリ４０１の通常の充電時、又は、車載バッテリ４０１の通常の放電時におけるパターンとは異なる。すなわち、判定用パターンは、電力計測用のパターンであってもよい。これにより、電流計測に適した判定用パターンで車載バッテリ４０１を充電、放電、又は充放電させることができ、電力の計測精度を正確に判断することができる。 For example, the judgment pattern is different from the pattern used during normal charging of the vehicle battery 401 or normal discharging of the vehicle battery 401. In other words, the judgment pattern may be a pattern for measuring power. This allows the vehicle battery 401 to be charged, discharged, or charged and discharged using a judgment pattern suitable for current measurement, and the accuracy of the power measurement can be accurately determined.
　電力計測部３３は、車載バッテリ４０１が判定用パターンで充電、放電、又は充放電しているときに、電圧及び電流を計測する。電力計測部３３は、車載バッテリ４０１の充電時のみにおける電圧及び電流を計測してもよいし、車載バッテリ４０１の放電時のみにおける電圧及び電流を計測してもよい。ただし、電力計測部３３の計測精度を正確に判断するためには、充電及び放電の両方における電圧及び電流を計測することが好ましい。 The power measurement unit 33 measures the voltage and current when the in-vehicle battery 401 is charging, discharging, or charging and discharging in the determination pattern. The power measurement unit 33 may measure the voltage and current only when the in-vehicle battery 401 is charging, or may measure the voltage and current only when the in-vehicle battery 401 is discharging. However, in order to accurately determine the measurement accuracy of the power measurement unit 33, it is preferable to measure the voltage and current during both charging and discharging.
　計測値取得部３２２は、電力計測部３３による計測値（対象計測値）を取得する。具体的には、計測値取得部３２２は、電力計測部３３による電圧計測値（対象電圧値）及び電流計測値（対象電流値）を取得する。 The measurement value acquisition unit 322 acquires the measurement value (target measurement value) by the power measurement unit 33. Specifically, the measurement value acquisition unit 322 acquires the voltage measurement value (target voltage value) and the current measurement value (target current value) by the power measurement unit 33.
　送信部３２３は、計測値取得部３２２によって取得された対象計測値を含む対象計測情報を管理装置１００へ送信する。対象計測情報は、対象電圧値と、対象電流値の計測時刻（以下、「対象電圧計測時刻」ともいう）と、対象電流値と、対象電流値の計測時刻（以下、「対象電流計測時刻」ともいう）とを含む。対象電圧計測時刻と、対象電流計測時刻とは同一時刻であってもよい。対象計測情報は、対象電圧計測時刻及び対象電流計測時刻の１つのみを含んでもよい。 The transmitting unit 323 transmits target measurement information including the target measurement value acquired by the measurement value acquiring unit 322 to the management device 100. The target measurement information includes the target voltage value, the measurement time of the target current value (hereinafter also referred to as the "target voltage measurement time"), the target current value, and the measurement time of the target current value (hereinafter also referred to as the "target current measurement time"). The target voltage measurement time and the target current measurement time may be the same time. The target measurement information may include only one of the target voltage measurement time and the target current measurement time.
　スマートメータ５０は、所定の時間間隔で電圧及び電流を繰り返し計測する。送信部５１０は、上述した判定用パターンで車載バッテリ４０１が充電、放電、又は充放電している間における計測値（基準計測値）を取得し、基準計測値を含む基準計測情報を管理装置１００へ送信する。具体的には、基準計測情報は、判定用パターンで車載バッテリ４０１が充電、放電、又は充放電している間における電圧計測値（基準電圧値）、基準電圧値の計測時刻（以下、「基準電圧計測時刻」ともいう）、判定用パターンで車載バッテリ４０１が充電、放電、又は充放電している間における電流計測値（基準電流値）、及び基準電流値の計測時刻（以下、「基準電流計測時刻」ともいう）を含む。基準電圧計測時刻と、基準電流計測時刻とは同一時刻であってもよい。基準計測情報は、基準電圧計測時刻及び基準電流計測時刻の１つのみを含んでもよい。 The smart meter 50 repeatedly measures the voltage and current at a predetermined time interval. The transmission unit 510 acquires the measurement value (reference measurement value) while the vehicle battery 401 is charging, discharging, or charging and discharging in the above-mentioned judgment pattern, and transmits reference measurement information including the reference measurement value to the management device 100. Specifically, the reference measurement information includes the voltage measurement value (reference voltage value) while the vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern, the measurement time of the reference voltage value (hereinafter also referred to as the "reference voltage measurement time"), the current measurement value (reference current value) while the vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern, and the measurement time of the reference current value (hereinafter also referred to as the "reference current measurement time"). The reference voltage measurement time and the reference current measurement time may be the same time. The reference measurement information may include only one of the reference voltage measurement time and the reference current measurement time.
　第１取得部１１２は、スマートメータ５０による基準計測値を取得する。例えば、第１取得部１１２は、スマートメータ５０から送信された基準計測情報を受信する。 The first acquisition unit 112 acquires a reference measurement value from the smart meter 50. For example, the first acquisition unit 112 receives reference measurement information transmitted from the smart meter 50.
　第２取得部１１３は、充放電装置３０による対象計測値を取得する。例えば、第２取得部１１３は、充放電装置３０から送信された対象計測情報を受信する。 The second acquisition unit 113 acquires the target measurement value obtained by the charging/discharging device 30. For example, the second acquisition unit 113 receives the target measurement information transmitted from the charging/discharging device 30.
　判定部１１５は、第１取得部１１２によって取得された基準計測値と、第２取得部１１３によって取得された対象計測値とに基づいて、充放電装置３０の電力計測部３３のキャリブレーションの実行が必要であるか否かを判定する。 The determination unit 115 determines whether or not it is necessary to perform calibration of the power measurement unit 33 of the charging/discharging device 30 based on the reference measurement value acquired by the first acquisition unit 112 and the target measurement value acquired by the second acquisition unit 113.
　算出部１１４は、電気配線２０に接続された負荷６０の使用電力値及び基準電力値に基づいて、充放電装置３０によって充電又は放電される充放電電力値を算出することができる。例えば、負荷６０の使用電力値は、１年における時期毎に算出された負荷６０の使用電力値の複数の統計値から選択される。一例では、算出部１１４は、統計ＤＢ１１１に格納されている時期毎の統計値から１つの（現在に対応する時期の）統計値を選択する。 The calculation unit 114 can calculate the charge/discharge power value charged or discharged by the charge/discharge device 30 based on the power usage value and reference power value of the load 60 connected to the electrical wiring 20. For example, the power usage value of the load 60 is selected from multiple statistical values of the power usage value of the load 60 calculated for each period of the year. In one example, the calculation unit 114 selects one statistical value (for the period corresponding to the present) from the statistical values for each period stored in the statistical DB 111.
　例えば、判定部１１５は、基準計測値と、対象計測値とを比較する。スマートメータ５０は、厳格な検定を受けるため電力の計測精度が高く、計測値の信頼性が高い。このため、判定部１１５は、基準計測値を真値とし、対象計測値が基準計測値からどれだけ乖離しているか、すなわち、対象計測値にどれだけ誤差が含まれるかを判断する。誤差が所定の許容範囲内であれば、充放電装置３０の電力計測部３３の計測精度は一定の基準を満たしていると判定される。この場合、判定部１１５は、電力計測部３３のキャリブレーションは不要であると判定することができる。誤差が許容範囲を外れれば、充放電装置３０の電力計測部３３の計測精度は基準を満たしていないと判定される。この場合、判定部１１５は、電力計測部３３のキャリブレーションは必要であると判定することができる。 For example, the determination unit 115 compares the reference measurement value with the target measurement value. The smart meter 50 undergoes rigorous testing, and therefore has high power measurement accuracy and high reliability of the measurement value. For this reason, the determination unit 115 takes the reference measurement value as the true value and determines how much the target measurement value deviates from the reference measurement value, that is, how much error is included in the target measurement value. If the error is within a predetermined allowable range, it is determined that the measurement accuracy of the power measurement unit 33 of the charging/discharging device 30 meets a certain standard. In this case, the determination unit 115 can determine that calibration of the power measurement unit 33 is unnecessary. If the error is outside the allowable range, it is determined that the measurement accuracy of the power measurement unit 33 of the charging/discharging device 30 does not meet the standard. In this case, the determination unit 115 can determine that calibration of the power measurement unit 33 is necessary.
　一例では、判定部１１５は、算出部１１４によって算出された充放電電力値と、対象計測値とを比較し、比較結果に基づいて、電力計測部３３のキャリブレーションの実行が必要であるか否かを判定することができる。これにより、１年における時期による使用電力量の差異を考慮して、電力計測部３３の計測精度を確認することができる。なお、統計値によって充放電電力値を算出しない場合は、算出部１１４の機能を省略することができる。 In one example, the determination unit 115 can compare the charge/discharge power value calculated by the calculation unit 114 with the target measurement value, and determine whether or not it is necessary to perform calibration of the power measurement unit 33 based on the comparison result. This makes it possible to check the measurement accuracy of the power measurement unit 33, taking into account differences in the amount of power used depending on the time of year. Note that if the charge/discharge power value is not calculated using statistical values, the function of the calculation unit 114 can be omitted.
　判定部１１５は、第１判定処理と、第２判定処理とを実行してもよい。第１判定処理は、基準電圧値と、対象電圧値とに基づいて、電力計測部３３のキャリブレーションの実行が必要であるか否かを判定する処理である。第２判定処理は、基準電流値と、対象電流値とに基づいて、電力計測部３３のキャリブレーションの実行が必要であるか否かを判定する処理である。 The determination unit 115 may execute a first determination process and a second determination process. The first determination process is a process for determining whether or not it is necessary to perform calibration of the power measurement unit 33 based on a reference voltage value and a target voltage value. The second determination process is a process for determining whether or not it is necessary to perform calibration of the power measurement unit 33 based on a reference current value and a target current value.
　具体的には、判定部１１５は、第１判定処理において、基準電圧値と対象電圧値との差分Ｄ１を算出する。差分Ｄ１は、基準電圧値と対象電圧値との差の絶対値であり、電圧センサ３３Ｖの計測誤差である。さらに判定部１１５は、差分Ｄ１を、予め設定された閾値Ｔｈ１と比較する。閾値Ｔｈ１は、電圧センサ３３Ｖの計測誤差の許容範囲を定義する。差分Ｄ１が閾値Ｔｈ１以下であれば、判定部１１５は、電力計測部３３のキャリブレーションの実行が不要であると判定する。差分Ｄ１が閾値Ｔｈ１より大きければ、判定部１１５は、電力計測部３３のキャリブレーションの実行が必要であると判定する。 Specifically, in the first judgment process, the judgment unit 115 calculates the difference D1 between the reference voltage value and the target voltage value. The difference D1 is the absolute value of the difference between the reference voltage value and the target voltage value, and is the measurement error of the voltage sensor 33V. Furthermore, the judgment unit 115 compares the difference D1 with a preset threshold Th1. The threshold Th1 defines the allowable range of the measurement error of the voltage sensor 33V. If the difference D1 is equal to or less than the threshold Th1, the judgment unit 115 judges that it is not necessary to perform calibration of the power measurement unit 33. If the difference D1 is greater than the threshold Th1, the judgment unit 115 judges that it is necessary to perform calibration of the power measurement unit 33.
　算出部１１４は、統計ＤＢ１１１から取得した使用電流の統計値を、基準電流値から差し引く。これにより、充放電装置３０による充放電電流値が算出される。充放電電流値は、電力変換回路３０１とプラグ３１との間の電力線に流れる電流の値に相当する。すなわち、充放電電流値は、電流センサ３３Ａによって計測される電流値の真値とすることができる。判定部１１５は、第２判定処理において、充放電電流値と対象電流値との差分Ｄ２を算出する。差分Ｄ２は、充放電電流値と対象電流値との差の絶対値であり、電流センサ３３Ａの計測誤差である。さらに判定部１１５は、差分Ｄ２を、予め設定された閾値Ｔｈ２と比較する。閾値Ｔｈ２は、電流センサ３３Ａの計測誤差の許容範囲を定義する。差分Ｄ２が閾値Ｔｈ２以下であれば、判定部１１５は、電力計測部３３のキャリブレーションの実行が不要であると判定する。差分Ｄ２が閾値Ｔｈ２より大きければ、判定部１１５は、電力計測部３３のキャリブレーションの実行が必要であると判定する。 The calculation unit 114 subtracts the statistical value of the current usage obtained from the statistical DB 111 from the reference current value. This calculates the charge/discharge current value by the charge/discharge device 30. The charge/discharge current value corresponds to the value of the current flowing through the power line between the power conversion circuit 301 and the plug 31. In other words, the charge/discharge current value can be the true value of the current value measured by the current sensor 33A. In the second judgment process, the judgment unit 115 calculates the difference D2 between the charge/discharge current value and the target current value. The difference D2 is the absolute value of the difference between the charge/discharge current value and the target current value, and is the measurement error of the current sensor 33A. Furthermore, the judgment unit 115 compares the difference D2 with a preset threshold value Th2. The threshold value Th2 defines the allowable range of the measurement error of the current sensor 33A. If the difference D2 is equal to or less than the threshold value Th2, the judgment unit 115 judges that it is not necessary to perform calibration of the power measurement unit 33. If the difference D2 is greater than the threshold Th2, the determination unit 115 determines that it is necessary to perform calibration of the power measurement unit 33.
　例えば、第１取得部１１２は、１日の特定の時間帯においてスマートメータ５０によって計測された基準計測値を取得する。同様に、第２取得部１１３は、１日の特定の時間帯において電力計測部３３によって計測された対象計測値を取得する。さらに具体的には、第１取得部１１２は、夜間にスマートメータ５０によって計測された基準計測値を取得し、第２取得部１１３は、夜間に電力計測部３３によって計測された対象計測値を取得する。これにより、負荷６０の使用電力が小さく、且つ、太陽光発電装置７０による発電が行われない夜間に計測された電力値によって電力計測部３３のキャリブレーションの要否が判定されるため、負荷６０の使用電力及び太陽光発電装置７０による発電量に起因する判定誤差を小さくすることができる。この場合、統計ＤＢ１１１に蓄積される使用電力（使用電流）の統計値は、夜間における使用電力（使用電流）の統計値である。 For example, the first acquisition unit 112 acquires a reference measurement value measured by the smart meter 50 during a specific time period of the day. Similarly, the second acquisition unit 113 acquires a target measurement value measured by the power measurement unit 33 during a specific time period of the day. More specifically, the first acquisition unit 112 acquires a reference measurement value measured by the smart meter 50 at night, and the second acquisition unit 113 acquires a target measurement value measured by the power measurement unit 33 at night. As a result, the need for calibration of the power measurement unit 33 is determined based on the power value measured at night when the power consumption of the load 60 is small and no power is generated by the solar power generation device 70, so that the determination error due to the power consumption of the load 60 and the amount of power generated by the solar power generation device 70 can be reduced. In this case, the statistical value of the power consumption (current consumption) accumulated in the statistical DB 111 is the statistical value of the power consumption (current consumption) at night.
　キャリブレーション実行指示部１１６は、判定部１１５によって電力計測部３３のキャリブレーションの実行が必要であると判定された場合に、キャリブレーションの実行を指示する指示情報を送信する。受信部３２４は、キャリブレーション実行指示部１１６から送信された指示情報を受信する。キャリブレーション実行部３２５は、受信部３２４によって受信された指示情報に基づいて、電力計測部３３のキャリブレーションを実行する。 The calibration execution instruction unit 116 transmits instruction information instructing the execution of calibration when the determination unit 115 determines that the execution of calibration of the power measurement unit 33 is necessary. The reception unit 324 receives the instruction information transmitted from the calibration execution instruction unit 116. The calibration execution unit 325 executes the calibration of the power measurement unit 33 based on the instruction information received by the reception unit 324.
　指示情報は、電力計測部３３のキャリブレーションに用いられる参照電力情報を含む。参照電力情報は、電力計測部３３による既知の計測値に対応する電力計測部５１の計測値である。さらに具体的には、参照電力情報は、電力計測部３３における既知の計測値の計測時刻と同一又は近似する時刻における電力計測部５１の電力の計測値である。 The instruction information includes reference power information used for calibrating the power measurement unit 33. The reference power information is a measurement value of the power measurement unit 51 that corresponds to a known measurement value by the power measurement unit 33. More specifically, the reference power information is a measurement value of the power of the power measurement unit 51 at a time that is the same as or close to the measurement time of the known measurement value by the power measurement unit 33.
　判定用パターンで車載バッテリ４０１が充電、放電、又は充放電している間、電力計測部５１と電力計測部３３の両方で電力が計測される。したがって、参照電力情報は、判定用パターンで車載バッテリ４０１が充電、放電、又は充放電している間に、電力計測部５１によって得られた計測値（基準計測値）であってもよい。 While the vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern, power is measured by both the power measurement unit 51 and the power measurement unit 33. Therefore, the reference power information may be a measurement value (reference measurement value) obtained by the power measurement unit 51 while the vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern.
　例えば、指示情報は、電圧センサ５１Ｖによって計測された電圧値に基づくキャリブレーション用電圧値と、電流センサ５１Ａによって計測された電流値に基づくキャリブレーション用電流値とを含む。 For example, the instruction information includes a calibration voltage value based on the voltage value measured by the voltage sensor 51V and a calibration current value based on the current value measured by the current sensor 51A.
　具体的な一例では、参照電力情報は、判定用パターンで車載バッテリ４０１が充電、放電、又は充放電している間に、電圧センサ５１Ｖによって得られた電圧計測値（基準電圧値）及び電流センサ５１Ａによって得られた電流計測値（基準電流値）のそれぞれを、キャリブレーション用電圧値及びキャリブレーション用電流値として含む。基準電圧計測時刻と対象電圧計測時刻とは互いに対応している（同一又は近似する）ため、基準電圧値は対象電圧値に対応している。基準電流計測時刻と対象電流計測時刻とは互いに対応している（同一又は近似する）ため、基準電流値は対象電流値に対応している。 In one specific example, the reference power information includes, as calibration voltage values and calibration current values, the voltage measurement value (reference voltage value) obtained by the voltage sensor 51V and the current measurement value (reference current value) obtained by the current sensor 51A while the vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern. Since the reference voltage measurement time and the target voltage measurement time correspond to each other (are the same or close to each other), the reference voltage value corresponds to the target voltage value. Since the reference current measurement time and the target current measurement time correspond to each other (are the same or close to each other), the reference current value corresponds to the target current value.
　キャリブレーション実行部３２５は、キャリブレーション用電圧値に基づいて電圧センサ３３Ｖのキャリブレーションを実行する。キャリブレーション実行部３２５は、キャリブレーション用電流値に基づいて電流センサ３３Ａのキャリブレーションを実行する、 The calibration execution unit 325 performs calibration of the voltage sensor 33V based on the calibration voltage value. The calibration execution unit 325 performs calibration of the current sensor 33A based on the calibration current value.
　具体的には、キャリブレーション実行部３２５は、対象電圧値が計測されたときと同じ電圧が、双方向ＡＣ／ＤＣコンバータ３１１からプラグ３１へ延びる電力線に印加されているときにおける電圧センサ３３Ｖの計測値が、基準電圧値（キャリブレーション用電圧値）に一致するように電圧センサ３３Ｖを調整する。キャリブレーション実行部３２５は、対象電流値が計測されたときと同じ電流が、双方向ＡＣ／ＤＣコンバータ３１１からプラグ３１へ延びる電力線に印加されているときにおける電流センサ３３Ａの計測値が、基準電流値（キャリブレーション用電流値）に一致するように電流センサ３３Ａを調整する。これにより、電圧センサ３３Ｖ及び電流センサ３３Ａのキャリブレーションが行われる。 Specifically, the calibration execution unit 325 adjusts the voltage sensor 33V so that the measurement value of the voltage sensor 33V when the same voltage as when the target voltage value was measured is applied to the power line extending from the bidirectional AC/DC converter 311 to the plug 31 matches the reference voltage value (calibration voltage value). The calibration execution unit 325 adjusts the current sensor 33A so that the measurement value of the current sensor 33A when the same current as when the target current value was measured is applied to the power line extending from the bidirectional AC/DC converter 311 to the plug 31 matches the reference current value (calibration current value). In this way, the voltage sensor 33V and the current sensor 33A are calibrated.
　通知要求部３２６は、キャリブレーション実行部３２５が電力計測部３３のキャリブレーションを実行した場合に、通知情報の出力を管理装置１００に要求する。通知情報は、キャリブレーションが実行されたことをユーザに通知するための情報である。 The notification request unit 326 requests the management device 100 to output notification information when the calibration execution unit 325 executes calibration of the power measurement unit 33. The notification information is information for notifying the user that calibration has been executed.
　通知処理部１１７は、通知要求部３２６からの要求を受け付ける。通知処理部１１７は、要求を受け付けると、通知情報を出力するための通知処理を実行する。出力部１１８は、通知処理部１１７による通知処理にしたがって、通知情報を出力する。 The notification processing unit 117 receives a request from the notification request unit 326. Upon receiving the request, the notification processing unit 117 executes notification processing to output notification information. The output unit 118 outputs the notification information according to the notification processing by the notification processing unit 117.
　出力部１１８は、例えば表示装置１０５である。通知情報は、例えばキャリブレーションが実行されたことをユーザに通知する通知画面である。図７は、通知画面の一例を示す図である。図７の例の通知画面１５０は、「電力計測のキャリブレーションを行いました」の文字情報を含む。これにより、ユーザにキャリブレーションが実行されたことを通知することができる。 The output unit 118 is, for example, the display device 105. The notification information is, for example, a notification screen that notifies the user that calibration has been performed. FIG. 7 is a diagram showing an example of the notification screen. The notification screen 150 in the example of FIG. 7 includes text information saying "Power measurement calibration has been performed." This makes it possible to notify the user that calibration has been performed.
［５．計測精度管理システムの動作］
　図８は、実施形態に係る計測精度管理システム全体の動作の一例を示すシーケンス図である。 [5. Operation of the measurement accuracy control system]
FIG. 8 is a sequence diagram showing an example of the operation of the entire measurement accuracy control system according to the embodiment.
　管理装置１００は、充放電装置３０に電力の計測指示を送信する（ステップＳ１１）。充放電装置３０は、管理装置１００からの計測指示を受信すると、車載バッテリ４０１の充電、放電、又は充放電を判定用パターンにしたがって実行する。 The management device 100 transmits a power measurement instruction to the charge/discharge device 30 (step S11). When the charge/discharge device 30 receives the measurement instruction from the management device 100, it charges, discharges, or charges/discharges the in-vehicle battery 401 according to the determination pattern.
　電力計測部３３は一定の周期で繰り返し電圧及び電流を計測する。このため、車載バッテリ４０１が判定用パターンで充電、放電、又は充放電している間も、電力計測部３３は電圧及び電流を計測する。同様に、電力計測部５１もまた一定の周期で繰り返し電圧及び電流を計測する。このため、車載バッテリ４０１が判定用パターンで充電、放電、又は充放電している間も、電力計測部５１は電圧及び電流を計測する。 The power measurement unit 33 repeatedly measures the voltage and current at a constant cycle. Therefore, the power measurement unit 33 measures the voltage and current even while the in-vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern. Similarly, the power measurement unit 51 also repeatedly measures the voltage and current at a constant cycle. Therefore, the power measurement unit 51 measures the voltage and current even while the in-vehicle battery 401 is charging, discharging, or charging and discharging in the judgment pattern.
　電力計測部５１は、車載バッテリ４０１が判定用パターンで充電、放電、又は充放電している間の基準電圧値及び基準電圧計測時刻、並びに、基準電流値及び基準電流計測時刻を含む基準計測情報を生成し、生成された基準計測情報を管理装置１００へ送信する（ステップＳ１３）。 The power measurement unit 51 generates reference measurement information including a reference voltage value and a reference voltage measurement time, as well as a reference current value and a reference current measurement time while the in-vehicle battery 401 is charging, discharging, or charging and discharging in the determination pattern, and transmits the generated reference measurement information to the management device 100 (step S13).
　電力計測部３３は、車載バッテリ４０１が判定用パターンで充電、放電、又は充放電している間の対象電圧値及び対象電圧計測時刻、並びに、対象電流値及び対象電流計測時刻を含む対象計測情報を生成し、生成された対象計測情報を管理装置１００へ送信する（ステップＳ１４）。 The power measurement unit 33 generates target measurement information including the target voltage value and the target voltage measurement time, as well as the target current value and the target current measurement time while the vehicle battery 401 is charging, discharging, or charging and discharging in the determination pattern, and transmits the generated target measurement information to the management device 100 (step S14).
　管理装置１００は、受信した基準計測情報及び対象計測情報に基づいて、電力計測部３３のキャリブレーションの実行が必要であるか否かを判定する判定処理を実行する（ステップＳ１５）。判定処理は、上述した第１判定処理及び第２判定処理を含む。 The management device 100 executes a determination process to determine whether or not it is necessary to perform calibration of the power measurement unit 33 based on the received reference measurement information and target measurement information (step S15). The determination process includes the first determination process and the second determination process described above.
　判定処理においてキャリブレーションの実行が必要であると判定された場合、管理装置１００は、指示情報を充放電装置３０へ送信し、キャリブレーションの実行を指示する（ステップＳ１６）。充放電装置３０は、指示情報を受信すると、電力計測部３３のキャリブレーションを実行する（ステップＳ１７）。 If the determination process determines that calibration needs to be performed, the management device 100 transmits instruction information to the charging/discharging device 30 to instruct it to perform calibration (step S16). Upon receiving the instruction information, the charging/discharging device 30 performs calibration of the power measurement unit 33 (step S17).
　キャリブレーションが完了すると、充放電装置３０は、キャリブレーションを実行したことのユーザへの通知を管理装置１００へ要求する（ステップＳ１８）。管理装置１００は、要求を受け付けると、表示装置１０５に通知画面１５０を表示する（ステップＳ１９）。 When the calibration is completed, the charging/discharging device 30 requests the management device 100 to notify the user that the calibration has been performed (step S18). When the management device 100 accepts the request, it displays a notification screen 150 on the display device 105 (step S19).
　図９は、実施形態に係る管理装置の処理の一例を示すフローチャートである。管理装置１００は、プロセッサ１０１が管理プログラム１１０を実行することにより、以下の処理を行う。以下の処理は、特定の時刻、例えば夜間に行われる。 FIG. 9 is a flowchart showing an example of the processing of the management device according to an embodiment. The management device 100 performs the following processing by the processor 101 executing the management program 110. The following processing is performed at a specific time, for example, at night.
　ユーザは、充放電装置３０のプラグ３１をコネクタ２１に差し込み、プラグ３２を電動車４０のインレット４０３に差し込む。これにより、充放電装置３０が電気配線２０に接続され、充放電装置３０が電動車４０と接続される。プロセッサ１０１は、充放電装置３０が電気配線２０に接続されると、当該接続を認識する（ステップＳ１０１）。 The user inserts the plug 31 of the charging/discharging device 30 into the connector 21, and the plug 32 into the inlet 403 of the electric vehicle 40. This connects the charging/discharging device 30 to the electrical wiring 20, and the charging/discharging device 30 is connected to the electric vehicle 40. When the charging/discharging device 30 is connected to the electrical wiring 20, the processor 101 recognizes the connection (step S101).
　プロセッサ１０１は、充放電装置３０へ、電力の計測指示を送信する（ステップＳ１０２）。これにより、充放電装置３０が車載バッテリ４０１の充電、放電、又は充放電を判定用パターンで実行する。車載バッテリ４０１が判定用パターンで充電、放電、又は充放電している間、電力計測部５１及び電力計測部３３によって電圧及び電流が計測される。 The processor 101 sends a power measurement instruction to the charging/discharging device 30 (step S102). This causes the charging/discharging device 30 to charge, discharge, or charge/discharge the in-vehicle battery 401 in the judgment pattern. While the in-vehicle battery 401 is charging, discharging, or charging/discharging in the judgment pattern, the voltage and current are measured by the power measurement unit 51 and the power measurement unit 33.
　スマートメータ５０は、基準計測情報を管理装置１００へ送信する。管理装置１００は、基準計測情報を受信する（ステップＳ１０３）。 The smart meter 50 transmits the reference measurement information to the management device 100. The management device 100 receives the reference measurement information (step S103).
　充放電装置３０は、対象計測情報を管理装置１００へ送信する。管理装置１００は、対象計測情報を受信する（ステップＳ１０４）。 The charging/discharging device 30 transmits the target measurement information to the management device 100. The management device 100 receives the target measurement information (step S104).
　プロセッサ１０１は、統計ＤＢ１１１から現在に対応する時期の使用電力の統計値を取得する（ステップＳ１０５）。ここでは、使用電力の統計値として、使用電流の統計値を用いる場合について説明する。プロセッサ１０１は、基準計測情報に含まれる基準電流値から使用電流の統計値を差し引き、充放電電流値を算出する（ステップＳ１０６）。 The processor 101 obtains the statistical value of power usage for the period corresponding to the present from the statistical DB 111 (step S105). Here, a case will be described in which the statistical value of current usage is used as the statistical value of power usage. The processor 101 subtracts the statistical value of current usage from the reference current value included in the reference measurement information to calculate the charge/discharge current value (step S106).
　プロセッサ１０１は、基準電圧値と対象電圧値との差分Ｄ１を算出し（ステップＳ１０７）、充放電電流値と対象電流値との差分Ｄ２を算出する（ステップＳ１０８）。 The processor 101 calculates the difference D1 between the reference voltage value and the target voltage value (step S107), and calculates the difference D2 between the charge/discharge current value and the target current value (step S108).
　プロセッサ１０１は、差分Ｄ１を閾値Ｔｈ１と比較し、差分Ｄ１が閾値Ｔｈ１より大きいか否かを判定する（ステップＳ１０９）。 The processor 101 compares the difference D1 with the threshold Th1 and determines whether the difference D1 is greater than the threshold Th1 (step S109).
　差分Ｄ１が閾値Ｔｈ１以下である場合（ステップＳ１０９においてＮＯ）、プロセッサ１０１は、差分Ｄ２と閾値Ｔｈ２とを比較し、差分Ｄ２が閾値Ｔｈ２より大きいか否かを判定する（ステップＳ１１０）。 If the difference D1 is equal to or smaller than the threshold Th1 (NO in step S109), the processor 101 compares the difference D2 with the threshold Th2 and determines whether the difference D2 is greater than the threshold Th2 (step S110).
　差分Ｄ２が閾値Ｔｈ２以下である場合（ステップＳ１１０においてＮＯ）、管理装置１００の処理は終了する。 If the difference D2 is equal to or less than the threshold Th2 (NO in step S110), the processing of the management device 100 ends.
　差分Ｄ１が閾値Ｔｈ１より大きい場合（ステップＳ１０９においてＹＥＳ）、又は、差分Ｄ２が閾値Ｔｈ２より大きい場合（ステップＳ１１０においてＹＥＳ）、プロセッサ１０１は、電力計測部３３のキャリブレーションが必要であると判定する。プロセッサ１０１は、指示情報を生成し、生成された指示情報を充放電装置３０へ送信する（ステップＳ１１１）。 If the difference D1 is greater than the threshold Th1 (YES in step S109), or if the difference D2 is greater than the threshold Th2 (YES in step S110), the processor 101 determines that calibration of the power measurement unit 33 is necessary. The processor 101 generates instruction information and transmits the generated instruction information to the charging/discharging device 30 (step S111).
　指示情報を受信した充放電装置３０は、指示情報に含まれる参照電力情報を用いて電力計測部３３のキャリブレーションを実行する。キャリブレーションが終了すると、充放電装置３０はキャリブレーション実行の通知要求を管理装置１００へ送信する。 The charging/discharging device 30 that receives the instruction information calibrates the power measurement unit 33 using the reference power information included in the instruction information. When the calibration is completed, the charging/discharging device 30 transmits a notification request for calibration execution to the management device 100.
　管理装置１００は、充放電装置３０からの通知要求を受信する（ステップＳ１１２）。プロセッサ１０１は、通知要求にしたがって、通知画面１５０を表示装置１０５に表示させる（ステップＳ１１３）。以上で、管理装置１００の処理が終了する。 The management device 100 receives a notification request from the charging/discharging device 30 (step S112). The processor 101 displays the notification screen 150 on the display device 105 in accordance with the notification request (step S113). This completes the processing of the management device 100.
［６．変形例］
　上述した実施形態では、スマートメータ５０において計測された電圧値を基準電圧値とし、基準電圧値と、充放電装置３０において計測された対象電圧値とに基づいて、充放電装置３０の電力計測部３３のキャリブレーションの要否を判定し（第１判定処理）、スマートメータ５０において計測された電流値を基準電流値とし、基準電流値と、充放電装置３０において計測された対象電流値とに基づいて、充放電装置３０の電力計測部３３のキャリブレーションの要否を判定した（第２判定処理）が、これに限定されない。スマートメータ５０から出力される電力値を基準電力値とし、基準電力値と、充放電装置３０において計測された電圧値、電流値、及び力率から算出される対象電力値とに基づいて、充放電装置３０の電力計測部３３のキャリブレーションの要否を判定してもよい。 [6. Modifications]
In the above-described embodiment, the voltage value measured in the smart meter 50 is set as a reference voltage value, and whether or not calibration of the power measurement unit 33 of the charging/discharging device 30 is determined based on the reference voltage value and the target voltage value measured in the charging/discharging device 30 (first determination process), and the current value measured in the smart meter 50 is set as a reference current value, and whether or not calibration of the power measurement unit 33 of the charging/discharging device 30 is determined based on the reference current value and the target current value measured in the charging/discharging device 30 (second determination process), but this is not limited to the above. The power value output from the smart meter 50 may be set as a reference power value, and whether or not calibration of the power measurement unit 33 of the charging/discharging device 30 is determined based on the reference power value and the target power value calculated from the voltage value, current value, and power factor measured in the charging/discharging device 30.
　上記の変形例において、管理装置１００は、統計ＤＢ１１１から現在に対応する時期の使用電力の統計値を取得し、基準電力値から使用電力の統計値を差し引くことで、充放電装置３０の充放電電力値を算出することもできる。管理装置１００は、算出された充放電電力値と、充放電装置３０において計測された対象電力値との差分を算出し、予め設定された閾値と差分を比較することで、電力計測部３３のキャリブレーションの要否を判定してもよい。 In the above modification, the management device 100 can also calculate the charge/discharge power value of the charge/discharge device 30 by obtaining the statistical value of power usage for the period corresponding to the present from the statistical DB 111 and subtracting the statistical value of power usage from the reference power value. The management device 100 can also calculate the difference between the calculated charge/discharge power value and a target power value measured in the charge/discharge device 30 and compare the difference with a preset threshold value to determine whether calibration of the power measurement unit 33 is required.
　上述した実施形態では、スマートメータ５０を基準計測部とし、対象計測部である電力計測部３３のキャリブレーションの要否を判定したが、これに限定されない。変形例として、分電盤２２に設けられた電力計測部２２１を基準計測部として用いることもできる。電力計測部２２１は、充放電装置３０の充放電電圧及び充放電電流を計測するため、使用電力の統計値による補正は不要である。よって、より簡易な処理で、電力計測部３３のキャリブレーションの要否を判定することができる。 In the above-described embodiment, the smart meter 50 is used as the reference measurement unit to determine whether calibration of the power measurement unit 33, which is the target measurement unit, is required, but this is not limited to the above. As a modified example, the power measurement unit 221 provided in the distribution board 22 can also be used as the reference measurement unit. Since the power measurement unit 221 measures the charge/discharge voltage and charge/discharge current of the charge/discharge device 30, correction based on the statistical value of power usage is not required. Therefore, it is possible to determine whether calibration of the power measurement unit 33 is required by simpler processing.
　上述した実施形態では、管理装置１００が、電力計測部３３のキャリブレーションの実行が必要であるか否かを判定し、キャリブレーションの実行が必要であると判定した場合に、充放電装置３０に対し、電力駅側部３３のキャリブレーションの実行を指示する構成について述べたが、これに限定されない。充放電装置３０が、電力計測部３３のキャリブレーションの実行が必要であるか否かを判定し、キャリブレーションの実行が必要であると判定した場合に、電力駅側部３３のキャリブレーションの実行を指示してもよい。すなわち、図６に示す判定部１１５及びキャリブレーション実行指示部１１６（及び算出部１１４）の機能を、充放電装置３０が有してもよい。 In the above-described embodiment, the management device 100 determines whether or not calibration of the power measurement unit 33 is necessary, and if it is determined that calibration is necessary, instructs the charge/discharge device 30 to perform calibration of the power station side unit 33. However, this is not limited to the above. The charge/discharge device 30 may determine whether or not calibration of the power measurement unit 33 is necessary, and if it is determined that calibration is necessary, instruct the charge/discharge device 30 to perform calibration of the power station side unit 33. In other words, the charge/discharge device 30 may have the functions of the determination unit 115 and the calibration execution instruction unit 116 (and the calculation unit 114) shown in FIG. 6.
　上述した実施形態では、充放電装置３０が電動車４０の車載バッテリの充放電に用いられたが、これに限定されない。例えば、住宅１１に固定的に設置されたバッテリの充放電装置であってもよい。 In the above-described embodiment, the charging/discharging device 30 is used to charge and discharge the on-board battery of the electric vehicle 40, but is not limited to this. For example, it may be a charging/discharging device for a battery fixedly installed in the house 11.
［７．補記］
　今回開示された実施の形態はすべての点で例示であって、制限的ではない。本発明の権利範囲は、上述の実施形態ではなく請求の範囲によって示され、請求の範囲と均等の意味及びその範囲内でのすべての変更が含まれる。 [7. Supplementary Notes]
The embodiments disclosed herein are illustrative in all respects and are not restrictive. The scope of the present invention is defined by the claims, not the above-described embodiments, and includes the meaning equivalent to the claims and all modifications within the scope thereof.
　１０　計測精度管理システム
　１１　住宅
　２０　電気配線
　２１　コネクタ
　２２　分電盤
　２２１　電力計測部
　２２１Ｖ　電圧センサ
　２２１Ａ　電流センサ
　２２２　電力計測部
　２２２Ｖ　電圧センサ
　２２２Ａ　電流センサ
　２３　電力線
　３０　充放電装置
　３１　プラグ
　３２　プラグ
　３３　電力計測部（対象計測部）
　３３Ｖ　電圧センサ
　３３Ａ　電流センサ
　３０１　電力変換回路
　３０２　制御回路
　３０３　通信インタフェース（通信Ｉ／Ｆ）
　３０４　無線通信インタフェース（無線通信Ｉ／Ｆ）
　３１１，３１２，３１３　双方向ＡＣ／ＤＣコンバータ
　３１４　変圧器
　３２１　充放電制御部
　３２２　計測値取得部
　３２３　送信部
　３２４　受信部
　３２５　キャリブレーション実行部
　３２６　通知要求部
　４０　電動車
　４０１　車載バッテリ
　４０２　車載制御装置
　４０３　インレット
　５０　スマートメータ（基準計測部）
　５１　電力計測部
　５１Ｖ　電圧センサ
　５１Ａ　電流センサ
　５２　無線通信部
　５１０　送信部
　６０　負荷
　７０　太陽光発電装置
　８０　バッテリ
　９０　電力変換装置
　９１　昇圧型ＤＣ／ＤＣコンバータ
　９２　双方向ＡＣ／ＤＣコンバータ
　９３　双方向ＤＣ／ＤＣコンバータ
　１００　管理装置
　１０１　プロセッサ
　１０２　不揮発性メモリ
　１０３　揮発性メモリ
　１０４　入力装置
　１０５　表示装置
　１０６　通信インタフェース（通信Ｉ／Ｆ）
　１１０　管理プログラム
　１１１　統計データベース（統計ＤＢ）
　１１１　計測指示部
　１１２　第１取得部
　１１３　第２取得部
　１１４　算出部
　１１５　判定部
　１１６　キャリブレーション実行指示部
　１１７　通知処理部
　１１８　出力部
　１５０　通知画面
　２００　無線通信機
  REFERENCE SIGNS LIST 10 Measurement accuracy control system 11 House 20 Electrical wiring 21 Connector 22 Distribution board 221 Power measurement unit 221V Voltage sensor 221A Current sensor 222 Power measurement unit 222V Voltage sensor 222A Current sensor 23 Power line 30 Charging/discharging device 31 Plug 32 Plug 33 Power measurement unit (target measurement unit)
33V voltage sensor 33A current sensor 301 power conversion circuit 302 control circuit 303 communication interface (communication I/F)
304 Wireless communication interface (wireless communication I/F)
311, 312, 313 Bidirectional AC/DC converter 314 Transformer 321 Charge/discharge control unit 322 Measurement value acquisition unit 323 Transmission unit 324 Reception unit 325 Calibration execution unit 326 Notification request unit 40 Electric vehicle 401 Vehicle battery 402 Vehicle control device 403 Inlet 50 Smart meter (reference measurement unit)
51 Power measurement unit 51V Voltage sensor 51A Current sensor 52 Wireless communication unit 510 Transmitter 60 Load 70 Photovoltaic power generation device 80 Battery 90 Power conversion device 91 Step-up DC/DC converter 92 Bidirectional AC/DC converter 93 Bidirectional DC/DC converter 100 Management device 101 Processor 102 Non-volatile memory 103 Volatile memory 104 Input device 105 Display device 106 Communication interface (communication I/F)
110 Management program 111 Statistical database (statistical DB)
Reference Signs List 111 Measurement instruction unit 112 First acquisition unit 113 Second acquisition unit 114 Calculation unit 115 Determination unit 116 Calibration execution instruction unit 117 Notification processing unit 118 Output unit 150 Notification screen 200 Wireless communication device

Claims (19)

  1. 　系統電源に接続された電気配線を通じて、バッテリを充放電する充放電装置と、
    　前記電気配線に接続された負荷の使用電力及び前記充放電装置による充放電電力を管理する管理装置と、
    　前記電気配線における電力を計測する基準計測部と、
    　を備える計測精度管理システムであって、
    　前記充放電装置は、前記バッテリの充放電電力を計測する対象計測部を含み、
    　前記管理装置は、
    　前記基準計測部による電力の計測値である基準計測値を取得する第１取得部と、
    　前記対象計測部による前記バッテリの充放電電力の計測値である対象計測値を取得する第２取得部と、
    　を含み、
    　前記計測精度管理システムは、
    　前記第１取得部によって取得された前記基準計測値と、前記第２取得部によって取得された前記対象計測値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定する判定部と、
    　前記判定部によって前記対象計測部のキャリブレーションの実行が必要であると判定された場合に、前記キャリブレーションの実行を指示する指示情報を送信する指示部と、
    　を備え、
    　前記充放電装置は、前記指示部から送信された前記指示情報に基づいて、前記対象計測部のキャリブレーションを実行するキャリブレーション実行部を含む、
    　計測精度管理システム。     A charging/discharging device that charges and discharges the battery through electrical wiring connected to a system power supply;
    a management device that manages the power usage of a load connected to the electrical wiring and the charging/discharging power of the charging/discharging device;
    A reference measurement unit that measures the power in the electrical wiring;
    A measurement accuracy control system comprising:
    the charging/discharging device includes a target measurement unit that measures charging/discharging power of the battery,
    The management device includes:
    a first acquisition unit that acquires a reference measurement value that is a measurement value of power by the reference measurement unit;
    a second acquisition unit that acquires a target measurement value that is a measurement value of charge/discharge power of the battery by the target measurement unit;
    Including,
    The measurement accuracy control system includes:
    a determination unit that determines whether or not it is necessary to perform calibration of the object measurement unit based on the reference measurement value acquired by the first acquisition unit and the object measurement value acquired by the second acquisition unit;
    an instruction unit that transmits instruction information for instructing execution of the calibration when the determination unit determines that execution of the calibration of the object measurement unit is necessary;
    Equipped with
    The charging/discharging device includes a calibration execution unit that executes calibration of the target measurement unit based on the instruction information transmitted from the instruction unit.
    Measurement accuracy control system.
  2. 　前記基準計測部は、前記電気配線における電圧を計測する基準電圧センサと、前記電気配線における電流を計測する基準電流センサとを含み、
    　前記対象計測部は、前記バッテリの充放電電圧を計測する対象電圧センサと、前記バッテリの充放電電流を計測する対象電流センサとを含み、
    　前記判定部は、
    　前記基準電圧センサによって計測される電圧値である基準電圧値と、前記対象電圧センサによって計測される電圧値である対象電圧値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定する第１判定処理と、
    　前記基準電流センサによって計測される電流値である基準電流値と、前記対象電流センサによって計測される電流値である対象電流値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定する第２判定処理と、
    　を実行する、
    　請求項１に記載の計測精度管理システム。     the reference measurement unit includes a reference voltage sensor that measures a voltage in the electrical wiring and a reference current sensor that measures a current in the electrical wiring;
    the target measurement unit includes a target voltage sensor that measures a charge/discharge voltage of the battery, and a target current sensor that measures a charge/discharge current of the battery,
    The determination unit is
    a first determination process for determining whether or not it is necessary to perform calibration of the target measurement unit based on a reference voltage value that is a voltage value measured by the reference voltage sensor and a target voltage value that is a voltage value measured by the target voltage sensor;
    a second determination process for determining whether or not it is necessary to perform calibration of the target measurement unit based on a reference current value, which is a current value measured by the reference current sensor, and a target current value, which is a current value measured by the target current sensor;
    Execute
    The measurement accuracy control system according to claim 1.
  3. 　前記指示情報は、前記基準電圧センサによって計測された電圧値に基づくキャリブレーション用電圧値と、前記基準電流センサによって計測された電流値に基づくキャリブレーション用電流値とを含み、
    　前記キャリブレーション実行部は、前記キャリブレーション用電圧値に基づいて前記対象電圧センサのキャリブレーションを実行し、前記キャリブレーション用電流値に基づいて前記対象電流センサのキャリブレーションを実行する、
    　請求項２に記載の計測精度管理システム。     the instruction information includes a calibration voltage value based on a voltage value measured by the reference voltage sensor and a calibration current value based on a current value measured by the reference current sensor;
    the calibration execution unit executes calibration of the target voltage sensor based on the calibration voltage value, and executes calibration of the target current sensor based on the calibration current value.
    The measurement accuracy control system according to claim 2.
  4. 　前記基準計測値は、前記系統電源から供給される電力又は前記系統電源に逆潮流される電力の計測値である、
    　請求項１から請求項３のいずれか１項に記載の計測精度管理システム。     The reference measurement value is a measurement value of power supplied from the grid power source or a measurement value of power flowing back to the grid power source.
    The measurement accuracy control system according to any one of claims 1 to 3.
  5. 　前記基準計測部は、スマートメータである、
    　請求項４に記載の計測精度管理システム。     The reference measurement unit is a smart meter.
    The measurement accuracy control system according to claim 4.
  6. 　前記計測精度管理システムは、前記電気配線に接続された負荷の使用電力値及び前記基準計測値に基づいて、前記充放電装置によって充電又は放電される充放電電力値を算出する算出部をさらに備え、
    　前記判定部は、前記算出部によって算出された前記充放電電力値と前記対象計測値との比較に基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定する、
    　請求項４又は請求項５に記載の計測精度管理システム。     The measurement accuracy management system further includes a calculation unit that calculates a charge/discharge power value charged or discharged by the charge/discharge device based on a power usage value of a load connected to the electric wiring and the reference measurement value,
    the determination unit determines whether or not it is necessary to perform calibration of the target measurement unit based on a comparison between the charge/discharge power value calculated by the calculation unit and the target measurement value.
    The measurement accuracy control system according to claim 4 or 5.
  7. 　前記負荷の使用電力値は、１年における時期毎に算出された前記負荷の使用電力値の複数の統計値から選択される、
    　請求項６に記載の計測精度管理システム。     The power consumption value of the load is selected from a plurality of statistical values of the power consumption value of the load calculated for each time period of a year.
    The measurement accuracy control system according to claim 6.
  8. 　前記負荷の使用電力値は、１日における特定の時間帯における前記負荷の使用電力値であり、
    　前記第１取得部は、前記特定の時間帯において前記基準計測部によって計測された前記基準計測値を取得し、
    　前記第２取得部は、前記特定の時間帯において前記対象計測部によって計測された前記対象計測値を取得する、
    　請求項６又は請求項７に記載の計測精度管理システム。     The power consumption value of the load is a power consumption value of the load in a specific time period of one day,
    The first acquisition unit acquires the reference measurement value measured by the reference measurement unit in the specific time period,
    The second acquisition unit acquires the object measurement value measured by the object measurement unit in the specific time period.
    The measurement accuracy control system according to claim 6 or 7.
  9. 　前記特定の時間帯は、夜間である、
    　請求項８に記載の計測精度管理システム。     The specific time period is nighttime.
    The measurement accuracy control system according to claim 8.
  10. 　前記電気配線は、発電機による発電電力を変換する電力変換器に接続されており、
    　前記判定部は、前記電力変換器からの出力電力値にさらに基づいて、前記充放電電力値を算出する、
    　請求項６から請求項９のいずれか１項に記載の計測精度管理システム。     the electrical wiring is connected to a power converter that converts power generated by the generator;
    The determination unit calculates the charge/discharge power value further based on an output power value from the power converter.
    The measurement accuracy control system according to any one of claims 6 to 9.
  11. 　前記充放電装置は、前記バッテリを特定のパターンで充電又は放電する充放電制御部を含み、
    　前記第２取得部は、前記バッテリを特定のパターンで充電又は放電したときの前記対象計測部による前記バッテリの充放電電力の計測値である前記対象計測値を取得する、
    　請求項１から請求項１０のいずれか１項に記載の計測精度管理システム。     The charging/discharging device includes a charge/discharge control unit that charges or discharges the battery in a specific pattern,
    The second acquisition unit acquires the target measurement value, which is a measurement value of charge/discharge power of the battery measured by the target measurement unit when the battery is charged or discharged in a specific pattern.
    The measurement accuracy control system according to any one of claims 1 to 10.
  12. 　前記管理装置は、前記充放電装置が前記対象計測部のキャリブレーションを実行した場合に、前記キャリブレーションが実行されたことをユーザに通知するための通知情報を出力する出力部を含む、
    　請求項１から請求項１１のいずれか１項に記載の計測精度管理システム。     The management device includes an output unit that outputs, when the charging/discharging device performs calibration of the target measurement unit, notification information for notifying a user that the calibration has been performed.
    The measurement accuracy control system according to any one of claims 1 to 11.
  13. 　前記管理装置は、前記判定部と、前記指示部とを含む、
    　請求項１から請求項１２のいずれか１項に記載の計測精度管理システム。     The management device includes the determination unit and the instruction unit.
    The measurement accuracy control system according to any one of claims 1 to 12.
  14. 　前記充放電装置は、前記判定部と、前記指示部とを含む、
    　請求項１から請求項１２のいずれか１項に記載の計測精度管理システム。     The charging/discharging device includes the determination unit and the instruction unit.
    The measurement accuracy control system according to any one of claims 1 to 12.
  15. 　前記バッテリは、電動車に搭載された車載バッテリである、
    　請求項１から請求項１４のいずれか１項に記載の計測精度管理システム。     The battery is an on-board battery mounted on an electric vehicle.
    The measurement accuracy control system according to any one of claims 1 to 14.
  16. 　系統電源に接続された電気配線に接続された負荷の使用電力、及び、前記電気配線を通じてバッテリを充放電する充放電装置充放電装置による充放電電力を管理する管理装置であって、
    　前記電気配線における電力を計測する基準計測部による電力の計測値である基準計測値を取得する第１取得部と、
    　前記充放電装置における充放電電力を計測する対象計測部による前記バッテリの充放電電力の計測値である対象計測値を取得する第２取得部と、
    　前記第１取得部によって取得された前記基準計測値と、前記第２取得部によって取得された前記対象計測値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定する判定部と、
    　前記判定部によって前記対象計測部のキャリブレーションの実行が必要であると判定された場合に、前記キャリブレーションの実行を指示する指示情報を送信する指示部と、
    　を備える、
    　管理装置。     A management device for managing the power consumption of a load connected to an electrical wiring connected to a system power supply, and the charging/discharging power of a charging/discharging device that charges and discharges a battery through the electrical wiring,
    a first acquisition unit that acquires a reference measurement value that is a measurement value of power by a reference measurement unit that measures power in the electric wiring;
    a second acquisition unit that acquires a target measurement value that is a measurement value of the charge/discharge power of the battery by a target measurement unit that measures the charge/discharge power of the charge/discharge device;
    a determination unit that determines whether or not it is necessary to perform calibration of the object measurement unit based on the reference measurement value acquired by the first acquisition unit and the object measurement value acquired by the second acquisition unit;
    an instruction unit that transmits instruction information for instructing execution of the calibration when the determination unit determines that execution of the calibration of the object measurement unit is necessary;
    Equipped with
    Management device.
  17. 　系統電源に接続された電気配線に接続された負荷の使用電力、及び、前記電気配線を通じてバッテリを充放電する充放電装置充放電装置による充放電電力を管理する管理装置によって使用される管理方法であって、
    　前記電気配線における電力を計測する基準計測部による電力の計測値である基準計測値を取得するステップと、
    　前記充放電装置における充放電電力を計測する対象計測部による前記バッテリの充放電電力の計測値である対象計測値を取得するステップと、
    　取得された前記基準計測値と、取得された前記対象計測値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定するステップと、
    　前記対象計測部のキャリブレーションの実行が必要であると判定された場合に、前記キャリブレーションの実行を指示する指示情報を送信するステップと、
    　を含む、
    　管理方法。     A management method used by a management device that manages the power usage of a load connected to an electrical wiring that is connected to a system power supply, and the charging/discharging power of a charging/discharging device that charges and discharges a battery through the electrical wiring, comprising:
    acquiring a reference measurement value, which is a measurement value of power by a reference measurement unit that measures power in the electric wiring;
    acquiring a target measurement value which is a measurement value of the charge/discharge power of the battery by a target measurement unit which measures the charge/discharge power of the charge/discharge device;
    determining whether or not it is necessary to perform calibration of the object measurement unit based on the acquired reference measurement value and the acquired object measurement value;
    transmitting instruction information for instructing execution of the calibration when it is determined that execution of the calibration of the target measurement unit is necessary;
    including,
    Management method.
  18. 　系統電源に接続された電気配線に接続された負荷の使用電力、及び、前記電気配線を通じてバッテリを充放電する充放電装置充放電装置による充放電電力を管理する管理装置によって使用される管理プログラムであって、
    　コンピュータに、
    　前記電気配線における電力を計測する基準計測部による電力の計測値である基準計測値を取得するステップと、
    　前記充放電装置における充放電電力を計測する対象計測部による前記バッテリの充放電電力の計測値である対象計測値を取得するステップと、
    　取得された前記基準計測値と、取得された前記対象計測値とに基づいて、前記対象計測部のキャリブレーションの実行が必要であるか否かを判定するステップと、
    　前記対象計測部のキャリブレーションの実行が必要であると判定された場合に、前記キャリブレーションの実行を指示する指示情報を送信するステップと、
    　を実行させるための、
    　管理プログラム。     A management program used by a management device that manages the power consumption of a load connected to an electrical wiring that is connected to a system power supply, and the charging/discharging power of a charging/discharging device that charges and discharges a battery through the electrical wiring, comprising:
    On the computer,
    acquiring a reference measurement value, which is a measurement value of power by a reference measurement unit that measures power in the electric wiring;
    acquiring a target measurement value, which is a measurement value of the charge/discharge power of the battery by a target measurement unit that measures the charge/discharge power of the charge/discharge device;
    determining whether or not it is necessary to perform calibration of the object measurement unit based on the acquired reference measurement value and the acquired object measurement value;
    transmitting instruction information for instructing execution of the calibration when it is determined that execution of the calibration of the target measurement unit is necessary;
    In order to execute
    Management program.
  19. 　系統電源に接続された電気配線を通じて、バッテリを充放電する充放電装置であって、
    　前記バッテリの充放電電力を計測する対象計測部と、
    　前記電気配線における電力を計測する基準計測部による電力の計測値である基準計測値、及び、前記対象計測部による前記バッテリの充放電電力の計測値である対象計測値に基づく、前記対象計測部のキャリブレーションの実行が必要であるか否かの判定結果に基づいて、前記対象計測部のキャリブレーションを実行するキャリブレーション実行部と、
    　を備える、
    　充放電装置。     A charging/discharging device that charges and discharges a battery through electrical wiring connected to a system power supply,
    a target measurement unit that measures the charge/discharge power of the battery;
    a calibration execution unit that executes calibration of the target measurement unit based on a determination result of whether or not calibration of the target measurement unit is required, the determination result being based on a reference measurement value that is a measurement value of power by a reference measurement unit that measures power in the electrical wiring, and a target measurement value that is a measurement value of charge/discharge power of the battery by the target measurement unit;
    Equipped with
    Charging and discharging device.
PCT/JP2022/036440 2022-09-29 2022-09-29 Measurement accuracy management system, management device, management method, management program, and charging/discharging device WO2024069851A1 (en)

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