WO2023038399A1 - Energy storage system comprising new installation battery rack, and method for controlling same - Google Patents
Energy storage system comprising new installation battery rack, and method for controlling same Download PDFInfo
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- WO2023038399A1 WO2023038399A1 PCT/KR2022/013356 KR2022013356W WO2023038399A1 WO 2023038399 A1 WO2023038399 A1 WO 2023038399A1 KR 2022013356 W KR2022013356 W KR 2022013356W WO 2023038399 A1 WO2023038399 A1 WO 2023038399A1
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- 238000004146 energy storage Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims description 43
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- 238000006243 chemical reaction Methods 0.000 claims description 11
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- 238000007796 conventional method Methods 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
Definitions
- the present invention relates to an energy storage system and a method for controlling the energy storage system, and more particularly, to an energy storage system including a battery rack that is newly installed or installed later in time and a method for controlling the energy storage system. .
- An energy storage system is a system that links renewable energy, a battery storing power, and existing grid power. Recently, as the spread of smart grid and renewable energy has been expanded and the efficiency and stability of power systems have been emphasized, the demand for energy storage systems is increasing for power supply and demand control and power quality improvement. . Depending on the purpose of use, the energy storage system can vary in output and capacity. A plurality of battery systems may be connected to each other to form a large-capacity energy storage system.
- performance of some battery racks may deteriorate over time, and accordingly, performance may be supplemented by adding new battery racks to existing battery racks.
- performance may be supplemented by adding new battery racks to existing battery racks.
- there is a difference in performance between the newly added rack and the previously installed rack and unnecessary rack balancing may be repeated due to the difference in performance between the racks.
- This causes a problem that the new battery rack follows the performance of the existing rack despite the addition of the new battery rack to supplement performance. That is, even though a new battery rack is added, the maximum performance (eg, rated capacity, usage period, etc.) of the new battery rack is not fully utilized.
- An object of the present invention for solving the above problems is to provide an energy storage system including an existing battery rack and a new battery rack.
- Another object of the present invention for solving the above problems is to provide a device for controlling a battery system including an existing battery rack and a new battery rack.
- Another object of the present invention for solving the above problems is to provide a method for controlling an energy storage system including an existing battery rack and a new battery rack.
- a plurality of first battery rack A plurality of battery protection units for managing the plurality of first battery racks, respectively; a plurality of second battery racks; A plurality of DC / DC converters for managing the plurality of second battery racks, respectively; And monitoring the outputs of the plurality of battery protection units and the plurality of DC / DC converters in conjunction with the plurality of battery protection units and the plurality of DC / DC converters, and controlling the outputs of the plurality of DC / DC converters , may include a battery section control device.
- the battery section control device detects the output power value of the plurality of first battery racks operating according to the charging or discharging command of the energy storage system, and the output power value of the plurality of first battery racks and the plurality of It is possible to calculate the output power value to be output by the plurality of second battery racks using the information of the first battery rack and the information of the plurality of second battery racks.
- the information of the plurality of second battery racks may include one or more of the number of the plurality of second battery racks, SOH, SOC, output current, output power, and temperature.
- the battery section control device may calculate the output weight of each second battery rack using the information on the plurality of second battery racks.
- the battery section control device also calculates a power command value for each of the second battery racks based on the number of second battery racks relative to the number of total battery racks in the energy storage system and the output weight of the second battery rack.
- the battery section control device may stop outputs of the plurality of DC/DC converters when an output of a power conversion system (PCS) indicates a stop of charging and discharging operations.
- PCS power conversion system
- the charge or discharge command may be transmitted from an energy management system (EMS) to a PCS.
- EMS energy management system
- Battery system control device for achieving the above another object, a plurality of battery protection units and a plurality of DCs each managing a plurality of second battery racks respectively managing a plurality of first battery racks / It can work with a DC converter, at least one processor; A memory for storing at least one command executed by the at least one processor may be included.
- the at least one instruction may include instructions to monitor outputs of the plurality of battery protection units and the plurality of DC/DC converters; and a command for controlling the outputs of the plurality of DC/DC converters according to the monitoring result.
- the command to monitor the outputs of the plurality of battery protection units and the plurality of DC / DC converters, to detect the output power value of the plurality of first battery racks operating according to the charging or discharging command of the energy storage system may contain commands.
- the command to control the output of the plurality of DC / DC converters according to the monitoring result, the output power value of the plurality of first battery racks and information of the plurality of first battery racks and the plurality of second battery racks Using the information of the plurality of second battery rack may include a command to calculate the output power value to be output.
- the command to control the output of the plurality of DC / DC converters according to the monitoring result a command to calculate the output weight of each second battery rack using the information on the plurality of second battery rack; And an output weight of the second battery rack and a command for calculating a power command value for each of the second battery racks based on the number of second battery racks compared to the total number of battery racks in the energy storage system.
- the charge or discharge command may be transmitted from an energy management system (EMS) to a PCS.
- EMS energy management system
- the control method of an energy storage system includes a plurality of first battery racks, a plurality of battery protection units each managing the plurality of first battery racks, a plurality of As a control method of an energy storage system including a second battery rack, and a plurality of DC / DC converters for managing the plurality of second battery racks, respectively, the plurality of battery protection units and the output of the plurality of DC / DC converters monitoring the; Detecting output power values of the plurality of first battery racks operating according to a charging or discharging command of the energy storage system; Using the output power values of the plurality of first battery racks, the information of the plurality of first battery racks, and the information of the plurality of second battery racks, calculating the output power values to be output by the plurality of second battery racks step; and controlling outputs of the plurality of DC/DC converters according to the calculated output power values.
- Calculating an output power value to be output by the plurality of second battery racks may include calculating an output weight of each second battery rack using information on the plurality of second battery racks; And calculating a power command value for each of the second battery racks based on the output weight of the second battery rack and the number of second battery racks compared to the total number of battery racks in the energy storage system. .
- the information of the plurality of second battery racks may include one or more of the number of the plurality of second battery racks, SOH, SOC, output current, output power, and temperature.
- the method of controlling the energy storage system may include stopping outputs of the plurality of DC/DC converters when outputs of a power conversion system (PCS) indicate a stop of charging and discharging operations.
- PCS power conversion system
- the charge or discharge command may be transmitted from an energy management system (EMS) to a PCS.
- EMS energy management system
- the performance of holding the new battery rack can be utilized to the maximum (eg, 100%).
- the present invention can operate the system as in the conventional method only by modifying the firmware of the BSC without modifying the firmware of the PCS and PMS.
- FIG. 1 is a block diagram of a conventional energy storage system.
- FIG. 2 is a block diagram of an energy storage system according to an embodiment of the present invention.
- FIG 3 illustrates a relationship between an output command value and an output value in each battery area when an energy storage system starts and stops according to an embodiment of the present invention.
- FIG. 4 illustrates a concept of calculating an output control weight of each DC/DC converter in an augmentation region according to an embodiment of the present invention.
- FIG. 5 is an operation flowchart of a control method of an energy storage system according to an embodiment of the present invention.
- FIG. 6 is a schematic block diagram of a battery system control device according to an embodiment of the present invention.
- first, second, A, and B may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention.
- the term “and/or” includes any combination of a plurality of related listed items or any of a plurality of related listed items.
- SOC State of Charge
- SOH State of Health
- a battery rack refers to a system with a minimum single structure that can be monitored and controlled through a BMS by connecting module units set by the battery manufacturer in series/parallel. can be configured.
- a battery bank may refer to a group of large-scale battery rack systems configured by connecting several racks in parallel. Monitoring and control of the rack BMS (RBMS) of the battery rack unit can be performed through the BMS of the battery bank unit.
- RBMS rack BMS
- BSC Battery Section Controller
- Battery Section Controller is a device that performs top-level control of the battery system including the battery bank unit battery system, and is also used as a control device in battery systems with multiple bank level structures.
- the rated capacity may mean the set capacity [Ah] of the battery set by the battery manufacturer during development.
- FIG. 1 is a block diagram of a conventional energy storage system.
- a battery cell The smallest unit of a battery that serves to store power in an energy storage system (ESS) is typically a battery cell.
- a series/parallel combination of battery cells may form a battery module, and a plurality of battery modules may form a battery rack. That is, a battery rack may be a minimum unit of a battery system with a series/parallel combination of battery modules.
- the battery rack may be referred to as a battery pack according to a device or system in which batteries are used.
- one battery rack may include a plurality of battery modules and one BPU 10 or a protection device.
- Battery racks can be monitored and controlled through RBMS (Rack BMS).
- RBMS monitors the current, voltage, and temperature of each battery rack it manages, and based on the monitoring results, calculates SOC (Status Of Charge) of the battery and controls charging and discharging.
- a battery protection unit (BPU) 10 is a device for protecting a battery from abnormal current and fault current in a battery rack unit.
- the BPU 10 may include a Main Contactor (MC), a fuse, a Circuit Breaker (CB), or a Disconnect Switch (DS).
- the BPU may control the battery system in units of racks by turning on/off the main contactor under the control of the RBMS.
- the BPU can also use a fuse to protect the battery from short circuit current in the event of a short circuit.
- existing battery systems can be controlled through protective devices such as BPUs and switch gears.
- a battery system controller (BSC) 20 is installed in each of the battery sections composed of a plurality of batteries and peripheral circuits, devices, etc. to monitor and control control objects such as voltage, current, temperature, circuit breaker, etc. can do.
- the BSC 20 is a topmost control device of a battery system including a bank unit battery system including a plurality of battery racks, and is also used as a control device in a battery system having a plurality of bank level structures.
- the power conversion system (PCS) 40 installed in each battery section is a device that performs actual charging and discharging based on the charging / discharging command from the EMS, and the power conversion unit (DC / AC inverter) and the controller It can be configured to include. Meanwhile, the output of each BPU may be connected to the PCS 40 through a DC bus, and the PCS 40 may be connected to the grid.
- the EMS (Energy Management System)/PMS (Power Management System) 30 manages the ESS system as a whole.
- the battery system is controlled only through protection elements such as BPU and switch gear, and individual control taking into account individual characteristics of the battery system such as battery capacity, SOH, and SOC. is impossible
- a plurality of battery racks serve as voltage sources, and the PCS charges and discharges the battery racks through CC (Constant Current) control or CP (Constant Power) control.
- CC Constant Current
- CP Constant Power
- the new battery rack includes a newly manufactured battery rack, but a battery including a DC/DC converter for DC/DC conversion to a battery rack used to reinforce an existing battery rack at a later point in time. It may also contain racks, which may be used or refurbished battery racks.
- FIG. 2 is a block diagram of an energy storage system according to an embodiment of the present invention.
- FIG. 2 shows a system in the case where a plurality of new battery racks are added to the existing energy storage system.
- an existing energy storage system may include characteristics similar to those of the energy storage system shown in FIG. ), BPU 100, battery rack (old rack), and BSC (200).
- EMS Electronicgy Management System
- PMS Power Management System
- BSC (Battery Section Controller) 200 may perform a role of managing the state of each rack and informing the upper system (EMS) of the limit value of the outputable battery.
- the BSC 200 may be implemented in a form mounted and installed on a desktop PC or the like. Also, the BSC 200 may be implemented as a separate device or controller.
- the PCS 400 is a device that performs actual charging and discharging based on the charging and discharging commands received from the EMS 300, and may include a DC/AC power conversion unit and a controller.
- the energy storage system uses a DC / DC converter (in the augmentation area) instead of a BPU for a plurality of newly added battery racks, and the performance of the newly added battery rack Reduces or prevents problems such as sudden drop in load and unbalanced balance between racks
- the DC/DC converter 150 may include a body and a DC/DC controller.
- the DC/DC converter 150 performs DC/DC conversion between a battery and a power conversion system (PCS).
- PCS power conversion system
- the DC/DC converter placed in the augmentation area allows the existing rack and the new battery rack to be electrically separated and operated.
- the output of the DC/DC converter can be actively controlled by the user, so even if there is a difference in SOC, SOH, and capacity between each battery rack, it is possible to control the battery output considering the characteristics of each battery rack.
- Each DC / DC converter is connected to the BSC (200) and PCS (400).
- BSC (200) may monitor and manage the state of the battery rack disposed in the augmentation area as well as the battery rack disposed in the existing area.
- the present invention provides an augmentation method using a DC/DC converter only by modifying BSC firmware in a battery area without modifying firmware of PCS and EMS.
- new battery racks in the augmentation area are used to strengthen existing battery racks (Old Racks), and include a DC/DC converter 150 rather than a BPU 100 . Therefore, using the newly added battery rack dedicated DC/DC converter 150 in the augmentation area instead of the battery protection unit (BPU) has the advantage of avoiding or reducing rapid deterioration of the newly added battery rack or balancing. can provide In addition, it is possible to provide an advantage of modifying only the BSC firmware in the battery area without modifying the firmware of the PCS or EMS.
- the EMS 300 transmits a charge/discharge command Pbat* to the PCS 300 in the same manner as in the conventional method.
- the PCS 300 receives a charge/discharge command (Pbat*) and outputs power corresponding to the command.
- Pbat* power is firstly (temporarily) output from the BPU racks disposed in the existing area.
- the BSC 200 is in a state in which the quantity information of the BPU rack disposed in the existing area and the DC / DC rack (used as a concept including a battery rack and a DC / DC converter) disposed in the augmentation area is identified .
- BSC (200) monitors the total output value (Pbat *) from all battery racks interworking with itself. Therefore, Pbat* means the total output power required for the BPU rack in the existing area and the DC/DC rack in the expansion area.
- the BSC (200) outputs a new battery rack in the augmentation area based on at least the output value of the battery rack in the existing area, the quantity information of the battery rack in the existing area, and the quantity information of the battery rack in the augmentation area. Calculate the value Paug* to do.
- BSC (200) also calculates the output weight for each battery rack in the augmentation area based on the status information (SOC, SOH, etc.) of each battery rack located in the augmentation area.
- the output value of each DC/DC rack can be calculated by multiplying the output weight of each battery rack by Paug*. That is, the BSC 200 calculates the charge/discharge command for the DC/DC converter in consideration of the remaining energy of the DC/DC rack in the augmentation area compared to the BPU rack in the existing area.
- the calculated charge/discharge command for the DC/DC converter is transmitted to each DC/DC converter through the communication line 250, and the DC/DC rack outputs power having a Paug* value.
- the charge/discharge command for the output power Pbat* may also be referred to as a directive for the output power Pbat*.
- the charge/discharge command for the output power may be expressed or symbolized as a value of output power (Pbat*) requested or required by the charge/discharge command resulting in the output power (Pbat*). Therefore, Pbat* can be used to express charge/discharge commands and output power according to circumstances.
- the charge/discharge command for the output value Paug* may also be referred to as an instruction for the output value Paug*.
- the charge/discharge command for the output value may be expressed or symbolized by the value of the output value Paug* requested or required by the charge/discharge command resulting in the output value Paug*. Therefore, Paug* can be used to designate charge/discharge commands and output values according to the context.
- the output of the PCS (400) becomes 0.
- the existing BPU area is a passive element area
- the output of the battery rack changes according to the output of the PCS.
- the augmentation area DC/DC area receives commands from the BSC and operates, the output Paug* is maintained. That is, for a very short moment, the augmentation area outputs Paug* and the BPU area temporarily accepts the output.
- the BSC detects that the output toward the PCS has become 0, and modifies the output command value Paug* of the DC/DC area to 0. Through this process, outputs of all racks in the BPU area and DC/DC area become 0 and the system operation stops.
- FIG 3 illustrates a relationship between an output command value and an output value in each battery area when an energy storage system starts and stops according to an embodiment of the present invention.
- the augmentation area When the augmentation area outputs the value of Paug*, the battery in the existing area outputs power of (Pbat* - Paug*). At this time, the command value of the PCS is maintained as Pbat*, because the EMS transmits a constant command value Pbat* to the PCS regardless of whether or not augmentation is performed. As such, according to the present invention, the PCS and EMS may operate like the existing system operation regardless of whether or not the augmentation is performed.
- the command value of PCS becomes 0 due to system stop.
- the existing BPU area is a passive element area
- the output of the battery rack changes according to the output of the PCS.
- the corresponding augmentation area maintains the output Paug* until receiving a command from the BSC, and controls the output to 0 from the time it receives a stop command from the BSC.
- the BPU area temporarily accepts the corresponding output (-Paug*).
- the output of the DC/DC area becomes 0 by the stop command from the BSC, the output of the BPU area also becomes 0.
- FIG. 4 illustrates a concept of calculating an output control weight of each DC/DC converter in an augmentation region according to an embodiment of the present invention.
- the BSC estimates the state of each rack based on information such as SOC and SHO of battery racks disposed in the augmentation area, and calculates the output weight of each DC/DC rack based on this value. can be calculated
- BSC (200) receives data such as SOC, SOH, current, voltage and temperature of each battery rack from each DC / DC rack.
- the BSC can calculate the output weight ⁇ 2 , ... ⁇ n of each DC/DC rack using this information.
- Equation 1 shows an equation for calculating the total output command value P aug * for the augmentation region.
- the units of Pbat* and P aug * may be watts (W).
- Equation 1 m is the number or quantity of BPU racks, and n is the number (or quantity) of DC/DC racks. Also, Pbat* is a charge/discharge command value received from the EMS.
- Equation 2 represents an expression for calculating output command values P DC/DC-1 * to P DC/DC-n * of the DC/DC rack in the augmentation region.
- the output command value of the DC/DC rack is calculated by multiplying the total output command value P aug * for the augmentation region by the weight for each rack. Also, the sum of the output weights of each DC/DC rack is 1.
- the battery rack in the augmentation area is a battery rack of the same type.
- the output weight ⁇ j of the battery rack #j during charging may be expressed as in Equation 3 below.
- Equation ( ) means the total of the space that can be charged by the entire battery rack in the augmentation area
- ( ) means the chargeable space of battery rack #j to which the corresponding output weight is applied.
- n is the total number of battery racks in the augmentation area.
- the output weight for each rack during discharge may be determined as a ratio of the SOC of the corresponding rack to the SOC of all battery racks in the augmentation area. That is, it can be defined as in Equation 4 below.
- the output weight for each battery rack may be determined by considering the SOH as well as the SOC of each rack.
- the output weight for each battery rack may be defined as in Equation 5 below.
- the output weight for each battery rack during discharging may be defined as in Equation 6 below.
- n, i and j are integers. Accordingly, the amount of augmented power to be supplied by each new battery rack #j may be provided by the output weight of the new battery rack #j, and the output weight may be included in the charge/discharge command.
- FIG. 5 is an operation flowchart of a control method of an energy storage system according to an embodiment of the present invention.
- a control method of an energy storage system includes a plurality of first battery racks, a plurality of battery protection units each managing the plurality of first battery racks, a plurality of second battery racks, and the plurality of second batteries. It can be performed by a battery section control device in an energy storage system including a plurality of DC/DC converters each managing a rack.
- the battery section control device monitors outputs of the plurality of battery protection units and the plurality of DC/DC converters (S510).
- the battery section control device detects an output power value of the plurality of first battery racks operating according to the charging or discharging command of the energy storage system (S520).
- the battery section control device calculates an output power value to be output by the plurality of second battery racks (S530).
- the information of the plurality of second battery racks may include one or more of the number of the plurality of second battery racks, SOH, SOC, output current, output power, and temperature.
- outputs of the plurality of DC/DC converters may be controlled according to the calculated output power values (S540).
- FIG. 6 is a schematic block diagram of a battery system control device according to an embodiment of the present invention.
- the battery system control device (or battery section control device) 200 includes at least one processor; and a memory storing at least one command executed by the at least one processor.
- the at least one instruction may include instructions to monitor outputs of the plurality of battery protection units and the plurality of DC/DC converters; and a command for controlling the outputs of the plurality of DC/DC converters according to the monitoring result.
- the processor may execute program commands stored in at least one memory.
- the processor may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present invention are performed.
- the memory may be composed of at least one of a volatile storage medium and a non-volatile storage medium.
- the memory may include at least one of read only memory (ROM) and random access memory (RAM).
- a computer-readable recording medium includes all types of recording devices in which data that can be read by a computer system is stored.
- computer-readable recording media may be distributed to computer systems connected through a network to store and execute computer-readable programs or codes in a distributed manner.
- the computer-readable recording medium may include hardware devices specially configured to store and execute program instructions, such as ROM, RAM, and flash memory.
- Program instructions can include machine language code, such as produced by a compiler, as well as high-level language code that can be executed by a computer, such as using an interpreter.
- a block or device corresponds to a method step or a feature of a method step.
- aspects described in the context of a method may also be represented by a corresponding block or item or a corresponding feature of a device.
- Some or all of the method steps may be performed by (or using) a hardware device such as, for example, a microprocessor, programmable computer, or electronic circuitry. In some embodiments, one or more of the most important method steps may be performed by such an apparatus.
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Abstract
Description
Claims (19)
- 복수의 제1 배터리 랙;A plurality of first battery racks;상기 복수의 제1 배터리 랙을 각각 관리하는 복수의 배터리 보호 유닛;A plurality of battery protection units for managing the plurality of first battery racks, respectively;복수의 제2 배터리 랙;a plurality of second battery racks;상기 복수의 제2 배터리 랙을 각각 관리하는 복수의 DC/DC 컨버터; 및A plurality of DC / DC converters for managing the plurality of second battery racks, respectively; and상기 복수의 배터리 보호 유닛 및 상기 복수의 DC/DC 컨버터와 연동하여 상기 복수의 배터리 보호 유닛 및 상기 복수의 DC/DC 컨버터의 출력을 모니터링하고, 상기 복수의 DC/DC 컨버터의 출력을 제어하는, 배터리 섹션 제어장치를 포함하는, 에너지 저장 시스템.Monitoring the outputs of the plurality of battery protection units and the plurality of DC / DC converters in conjunction with the plurality of battery protection units and the plurality of DC / DC converters, and controlling the outputs of the plurality of DC / DC converters, Energy storage system, including battery section control.
- 청구항 1에 있어서, The method of claim 1,상기 배터리 섹션 제어장치는, The battery section control device,상기 에너지 저장 시스템의 충전 또는 방전 지령에 따라 동작하는 상기 복수의 제1 배터리 랙의 출력 전력값을 검출하고, Detecting output power values of the plurality of first battery racks operating according to the charging or discharging command of the energy storage system,상기 복수의 제1 배터리 랙의 출력 전력값, 상기 복수의 제1 배터리 랙의 정보 및 상기 복수의 제2 배터리 랙의 정보를 이용해 상기 복수의 제2 배터리 랙이 출력할 출력 전력값을 산출하는, 에너지 저장 시스템.Using the output power values of the plurality of first battery racks, the information of the plurality of first battery racks, and the information of the plurality of second battery racks to calculate the output power values to be output by the plurality of second battery racks, energy storage system.
- 청구항2에 있어서, In claim 2,상기 복수의 제2 배터리 랙의 정보는 Information on the plurality of second battery racks상기 복수의 제2 배터리 랙의 개수, SOH(State of Health), SOC(State of Charge), 출력 전류, 출력 전력, 및 온도 중 하나 이상을 포함하는, 에너지 저장 시스템.The number of the plurality of second battery racks, state of health (SOH), state of charge (SOC), output current, output power, and energy storage system including one or more of the temperature.
- 청구항 2에 있어서, The method of claim 2,상기 배터리 섹션 제어 장치는, The battery section control device,상기 복수의 제2 배터리 랙에 대한 정보를 이용해 각 제2 배터리 랙의 출력 가중치를 계산하는, 에너지 저장 시스템., Energy storage system for calculating the output weight of each second battery rack using the information on the plurality of second battery racks.
- 청구항 4에 있어서, The method of claim 4,상기 배터리 섹션 제어 장치는, The battery section control device,복수의 제1 배터리 랙 및 복수의 제2 배터리 랙의 출력 전력 값, 복수의 제1 배터리 랙의 수량 정보, 및 및 복수의 제2 배터리 랙의 수량 정보에 기초하여 복수의 제2 배터리 랙에 대한 총 전력 지령 값을 계산하도록 구성된, 에너지 저장 시스템.For a plurality of second battery racks based on the output power values of the plurality of first battery racks and the plurality of second battery racks, quantity information of the plurality of first battery racks, and quantity information of the plurality of second battery racks. An energy storage system configured to calculate a total power reference value.
- 청구항 5에 있어서, The method of claim 5,상기 배터리 섹션 제어 장치는, The battery section control device,각각의 제2 배터리 랙에 대한 출력 가중치 및 상기 복수의 제2 배터리 랙에 대한 총 전력 지령 값에 기초하여 복수의 제2 배터리 랙 각각에 대한 개별 전력 지령 값을 계산하도록 구성된, 에너지 저장 시스템.An energy storage system configured to calculate an individual power command value for each of a plurality of second battery racks based on an output weight for each second battery rack and a total power command value for the plurality of second battery racks.
- 청구항 1에 있어서, The method of claim 1,상기 배터리 섹션 제어장치는, PCS(Power Conversion System)의 출력이 충방전 동작의 정지를 나타내는 경우 상기 복수의 DC/DC 컨버터의 출력을 중단시키는, 에너지 저장 시스템.The battery section control device stops the output of the plurality of DC / DC converters when the output of the PCS (Power Conversion System) indicates the stop of the charging and discharging operation, the energy storage system.
- 청구항 2에 있어서, The method of claim 2,상기 충전 또는 방전 지령은 상기 에너지 저장 시스템의 EMS(Energy Management System)로부터 PCS로 전달되는, 에너지 저장 시스템.The charge or discharge command is transmitted from an energy management system (EMS) of the energy storage system to a PCS.
- 청구항 1에 있어서, The method of claim 1,상기 복수의 제2 배터리 랙은 상기 복수의 배터리 보호 유닛 및 상기 복수의 DC/DC 컨버터 중 상기 복수의 DC/DC 컨버터에 의해서만 관리되는, 상기 에너지 저장 시스템.The plurality of second battery racks are managed only by the plurality of DC / DC converters of the plurality of battery protection units and the plurality of DC / DC converters, the energy storage system.
- 복수의 제1 배터리 랙을 각각 관리하는 복수의 배터리 보호 유닛 및 복수의 제2 배터리 랙을 각각 관리하는 복수의 DC/DC 컨버터와 연동하는 배터리 시스템 제어 장치로서, A battery system control device interworking with a plurality of battery protection units each managing a plurality of first battery racks and a plurality of DC/DC converters each managing a plurality of second battery racks,적어도 하나의 프로세서;at least one processor;상기 적어도 하나의 프로세서를 통해 실행되는 적어도 하나의 명령을 저장하는 메모리를 포함하고, a memory storing at least one instruction executed by the at least one processor;상기 적어도 하나의 명령은,The at least one command,상기 복수의 배터리 보호 유닛 및 상기 복수의 DC/DC 컨버터의 출력을 모니터링하도록 하는 명령; 및instructions to monitor outputs of the plurality of battery protection units and the plurality of DC/DC converters; and상기 모니터링 결과에 따라 상기 복수의 DC/DC 컨버터의 출력을 제어하도록 하는 명령을 포함하는, 배터리 시스템 제어 장치.And a battery system control device comprising a command to control the output of the plurality of DC / DC converters according to the monitoring result.
- 청구항 10에 있어서, The method of claim 10,상기 복수의 배터리 보호 유닛 및 상기 복수의 DC/DC 컨버터의 출력을 모니터링하도록 하는 명령은,The command to monitor the outputs of the plurality of battery protection units and the plurality of DC / DC converters,에너지 저장 시스템의 충전 또는 방전 지령에 따라 동작하는 상기 복수의 제1 배터리 랙의 출력 전력값을 검출하도록 하는 명령을 포함하는, 배터리 시스템 제어 장치.Including a command to detect the output power value of the plurality of first battery rack operating in accordance with the charging or discharging command of the energy storage system, the battery system control device.
- 청구항 10에 있어서, The method of claim 10,상기 모니터링 결과에 따라 상기 복수의 DC/DC 컨버터의 출력을 제어하도록 하는 명령은, The command to control the output of the plurality of DC / DC converters according to the monitoring result,상기 복수의 제1 배터리 랙의 출력 전력값, 상기 복수의 제1 배터리 랙의 정보 및 상기 복수의 제2 배터리 랙의 정보를 이용해 상기 복수의 제2 배터리 랙 각각이 출력할 출력 전력값을 산출하도록 하는 명령을 포함하는, 배터리 시스템 제어 장치.To calculate an output power value to be output by each of the plurality of second battery racks using the output power values of the plurality of first battery racks, the information of the plurality of first battery racks, and the information of the plurality of second battery racks A battery system control device comprising a command to do.
- 청구항 10에 있어서, The method of claim 10,상기 모니터링 결과에 따라 상기 복수의 DC/DC 컨버터의 출력을 제어하도록 하는 명령은, The command to control the output of the plurality of DC / DC converters according to the monitoring result,복수의 제1 배터리 랙 및 복수의 제2 배터리 랙의 출력 전력 값, 복수의 제1 배터리 랙의 수량 정보, 및 및 복수의 제2 배터리 랙의 수량 정보에 기초하여 복수의 제2 배터리 랙에 대한 총 전력 지령 값을 계산하도록하는 명령; 및For a plurality of second battery racks based on the output power values of the plurality of first battery racks and the plurality of second battery racks, quantity information of the plurality of first battery racks, and quantity information of the plurality of second battery racks. command to calculate the total power reference value; and각각의 제2 배터리 랙에 대한 출력 가중치 및 상기 복수의 제2 배터리 랙에 대한 총 전력 지령 값에 기초하여 상기 복수의 제2 배터리 랙 각각에 대한 개별 전력 지령 값을 계산하도록 하는 명령을 포함하는, 배터리 시스템 제어 장치.Comprising a command to calculate an individual power command value for each of the plurality of second battery racks based on the output weight for each second battery rack and the total power command value for the plurality of second battery racks, Battery system control unit.
- 청구항 11에 있어서, The method of claim 11,상기 충전 또는 방전 지령은 EMS(Energy Management System)로부터 PCS (Power Conversion System)로 전달되는, 배터리 시스템 제어 장치.The charge or discharge command is transmitted from an EMS (Energy Management System) to a PCS (Power Conversion System), the battery system control device.
- 복수의 제1 배터리 랙, 상기 복수의 제1 배터리 랙을 각각 관리하는 복수의 배터리 보호 유닛, 복수의 제2 배터리 랙, 및 상기 복수의 제2 배터리 랙을 각각 관리하는 복수의 DC/DC 컨버터를 포함하는 에너지 저장 시스템의 제어 방법으로서, A plurality of first battery racks, a plurality of battery protection units each managing the plurality of first battery racks, a plurality of second battery racks, and a plurality of DC / DC converters each managing the plurality of second battery racks As a control method of an energy storage system comprising:상기 복수의 배터리 보호 유닛 및 상기 복수의 DC/DC 컨버터의 출력을 모니터링하는 단계;monitoring outputs of the plurality of battery protection units and the plurality of DC/DC converters;상기 에너지 저장 시스템의 충전 또는 방전 지령에 따라 동작하는 상기 복수의 제1 배터리 랙의 출력 전력값을 검출하는 단계;Detecting output power values of the plurality of first battery racks operating according to a charging or discharging command of the energy storage system;상기 복수의 제1 배터리 랙의 출력 전력값, 상기 복수의 제1 배터리 랙의 정보 및 상기 복수의 제2 배터리 랙의 정보를 이용해, 상기 복수의 제2 배터리 랙이 출력할 출력 전력값을 산출하는 단계; 및Using the output power values of the plurality of first battery racks, the information of the plurality of first battery racks, and the information of the plurality of second battery racks, calculating the output power values to be output by the plurality of second battery racks step; and상기 산출된 출력 전력값에 따라 상기 복수의 DC/DC 컨버터의 출력을 제어하는 단계를 포함하는, 에너지 저장 시스템의 제어 방법.Controlling the output of the plurality of DC / DC converters according to the calculated output power value.
- 청구항 15에 있어서, The method of claim 15상기 복수의 제2 배터리 랙이 출력할 출력 전력값을 산출하는 단계는, The step of calculating the output power value to be output by the plurality of second battery racks,복수의 제1 배터리 랙 및 복수의 제2 배터리 랙의 출력 전력 값, 복수의 제1 배터리 랙의 수량 정보, 및 및 복수의 제2 배터리 랙의 수량 정보에 기초하여 복수의 제2 배터리 랙에 대한 총 전력 지령 값을 계산하는 단계; 및For a plurality of second battery racks based on the output power values of the plurality of first battery racks and the plurality of second battery racks, quantity information of the plurality of first battery racks, and quantity information of the plurality of second battery racks. calculating a total power command value; and각각의 제2 배터리 랙에 대한 출력 가중치 및 상기 복수의 제2 배터리 랙에 대한 총 전력 지령 값에 기초하여 상기 복수의 제2 배터리 랙 각각에 대한 개별 전력 지령 값을 계산하는 단계를 포함하는, 에너지 저장 시스템의 제어 방법.Comprising the step of calculating an individual power command value for each of the plurality of second battery racks based on the total power command value for the output weight and the plurality of second battery racks for each second battery rack, energy Storage system control method.
- 청구항 15에 있어서, The method of claim 15상기 복수의 제2 배터리 랙의 정보는, The information of the plurality of second battery racks,상기 복수의 제2 배터리 랙의 개수, SOH, SOC, 출력 전류, 출력 전력, 및 온도 중 하나 이상을 포함하는, 에너지 저장 시스템의 제어 방법.The plurality of second number of battery racks, SOH, SOC, output current, output power, and including one or more of the temperature, the control method of the energy storage system.
- 청구항 15에 있어서, The method of claim 15PCS(Power Conversion System)의 출력이 충방전 동작의 정지를 나타내는 경우 상기 복수의 DC/DC 컨버터의 출력을 중단시키는 단계를 포함하는, 에너지 저장 시스템의 제어 방법.A method of controlling an energy storage system, comprising stopping outputs of the plurality of DC/DC converters when outputs of a power conversion system (PCS) indicate a stop of charging and discharging operations.
- 청구항 15에 있어서, The method of claim 15상기 충전 또는 방전 지령은 EMS(Energy Management System)로부터 PCS로 전달되는, 에너지 저장 시스템의 제어 방법.The charge or discharge command is transmitted from an EMS (Energy Management System) to a PCS, a control method of an energy storage system.
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