CN117639279A - Control device of household energy storage system - Google Patents
Control device of household energy storage system Download PDFInfo
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Abstract
The present disclosure provides a control device for a household energy storage system. The control device includes: the device comprises a calculation module, a sampling module, a communication module, an actuator module and a power supply module; the actuator module comprises an execution controller and actuators respectively arranged on the first branch, the second branch and the third branch; the system comprises an actuator, an execution controller, a power grid, a household energy storage system, a household load and a household load, wherein the actuator is used for switching the conduction state of the branch where the actuator is located, the execution controller is used for controlling the switching state of the actuator, the first branch is used for connecting the power grid with the energy storage converter in the household energy storage system, the second branch is used for connecting the energy storage converter with the household load, and the third branch actuator is used for connecting the power grid with the household load in the household energy storage system. The problem that the controllability and the stability of the household energy storage system in the prior art are seriously insufficient in coping with faults is solved, the reliability and the robustness of the micro-grid based on the energy storage converter are improved, and meanwhile the reliability of the local household energy storage system is improved.
Description
Technical Field
The application relates to the technical field of new energy storage control, in particular to a control device of a household energy storage system.
Background
With the development of new energy technologies such as photovoltaic and wind power, a power generation device such as a photovoltaic cell and a wind motor is arranged in a household scene so as to supply power and store energy for household loads after power generation, and the device becomes an increasingly important research field. The household energy storage system comprises the power generation devices and the energy storage converter, wherein the household energy storage converter has the basic function of carrying out energy change processing on the current generated by the power generation devices so as to supply power to household loads, and meanwhile, the household energy storage converter is used for managing the electric quantity of the energy storage battery and is also connected with a power grid so as to enable the redundant electric quantity to be connected with the power grid through the power grid when the power generation devices generate electricity sufficiently, so that additional benefits are brought.
In the related art, the monitoring and management equipment of the household energy storage system including the household energy storage converter is mainly realized through an energy management system, the energy management system monitors the running state of the system through an energy management gateway, but only can realize a fault alarm function, and after any part of the household energy storage system fails, other parts of the household energy storage system cannot be maintained to continue working, so that the controllability and the stability are seriously insufficient.
Disclosure of Invention
The disclosure provides a control device of a household energy storage system, so as to solve the problem that the controllability and stability of the household energy storage system in the prior art are seriously insufficient.
In a first aspect, the present disclosure provides a control device for a household energy storage system, the control device for a household energy storage system comprising:
the device comprises a calculation module, a sampling module, a communication module, an actuator module and a power supply module;
the actuator module comprises an execution controller and actuators respectively arranged on the first branch, the second branch and the third branch; the system comprises an actuator, an execution controller, an energy storage converter, a household energy storage system, a power grid, a household energy storage system, a household load and a household load, wherein the actuator is used for switching the conducting state of the branch where the actuator is located;
the sampling module is respectively connected with two ends of the actuator on the first branch and is used for collecting signal data of the energy storage converter and the power grid;
the communication module is connected with a communication interface of the energy storage converter and is used for acquiring state information of the energy storage converter;
The computing module is respectively connected with the communication module, the sampling module and the execution controller, and is used for determining the running states of the household energy storage system and the power grid according to the signal data and the state information, determining corresponding state control commands based on the running states and outputting the corresponding state control commands to the execution controller;
the power module is electrically connected with the calculation module, the sampling module, the communication module and the executor module respectively.
Optionally, the sampling module comprises a differential voltage sampling circuit, the differential voltage sampling circuit is respectively connected with the computing module and an ac power grid end inlet wire interface and a power grid inlet wire interface of the energy storage converter, and the differential voltage sampling circuit is used for collecting signal data of the power grid through the power grid inlet wire interface and collecting signal data of the energy storage converter through the ac power grid end inlet wire interface.
Optionally, the actuator comprises a combination switch, wherein the combination switch comprises two pairs of relays which are mutually connected in parallel, and the two pairs of relays are mutually connected in series; the relay is connected with the execution controller.
Optionally, the relay comprises a main contact and an auxiliary contact, the execution controller further comprises a fault detection module, the main contact of the relay is connected with the execution controller, the auxiliary contact is connected with the fault detection module, and the fault detection module is connected with the calculation module.
Optionally, the communication module is in communication connection with the control server, and is used for receiving the control strategy information sent by the control server and sending the control strategy information to the calculation module, and the calculation module is used for determining the state control command based on the control strategy information, the running states of the household energy storage system and the power grid.
Optionally, the control device of the household energy storage system further comprises: a storage module and/or an expansion storage module; the storage module is used for caching state information, signal data and state control commands; the expansion storage module is used for storing the data cached in the storage module.
In a second aspect, the present disclosure provides a control method of a home energy storage system, the control method of the home energy storage system including the steps of:
acquiring signal data of the energy storage converter and the power grid acquired by the sampling module, and acquiring state information of the energy storage converter acquired by the communication module;
determining an operating state of the energy storage converter, the power grid and the actuator module based on the signal data and the state information;
determining a corresponding state control command based on the operating states of the energy storage converter, the power grid and the actuator module;
and outputting a corresponding state control command to an execution controller in the executor module.
Optionally, determining the corresponding state control command based on the operating states of the energy storage converter, the power grid and the actuator module includes: if the running states of the energy storage converter, the power grid and the executor module are all normal running states, determining a state control command to keep the first branch and the second branch in a conducting state, and keeping the third branch in a disconnecting state; if the operation states of the energy storage converter, the power grid and the executor module are all fault states, determining that the state control command is to disconnect the first branch and the second branch, and switching the third branch to a conducting state.
Optionally, the control device of the household energy storage system further comprises an alarm module connected with the calculation module; if the operation states of the energy storage converter, the power grid and the executor module are all fault states, determining that the state control command is to disconnect the first branch and the second branch and switch the third branch to a conducting state, including: if the power grid is in a fault state and the energy storage converter and the executor module are in a normal operation state, determining that the state control command is to disconnect the first branch and the third branch, keeping the second branch in a conducting state, and enabling the alarm module to generate first type alarm information; if the energy storage converter is in a fault state and the power grid and the executor module are in a normal operation state, determining that the state control command is to disconnect the first branch and the second branch, keeping the third branch in a conducting state, and enabling the alarm module to generate second-type alarm information; if the execution controller in the executor module is in a fault state and the energy storage converter and the power grid are in a normal running state, determining that the state control command is to disconnect the first branch and the second branch, keeping the third branch in a conducting state, and enabling the alarm module to generate third type alarm information; if the executor in the executor module is in a fault state and the energy storage converter and the power grid are in a normal running state, determining a state control command to keep the first branch and the second branch in a conducting state, keeping the third branch in a disconnecting state, and enabling the alarm module to generate fourth type alarm information.
Optionally, if the operation states of the energy storage converter, the power grid and the actuator module are all fault states, determining the state control command to disconnect the first branch and the second branch and switch the third branch to the on state includes: if any one of the energy storage converter, the power grid and the executor module is not in a fault state and is in an abnormal operation state based on the control strategy information, determining a state control command to enable the alarm module to generate fifth type alarm information.
In a third aspect, the present disclosure also provides a control apparatus including:
at least one processor;
and a memory communicatively coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor to cause the control device to perform a method of controlling the household energy storage system as in any of the embodiments of the second aspect of the present disclosure.
In a fourth aspect, the present disclosure also provides a computer-readable storage medium having stored therein computer-executable instructions which, when executed by a processor, are adapted to carry out a method of controlling a domestic energy storage system according to any of the second aspects of the present disclosure.
In a fifth aspect, the present disclosure also provides a computer program product containing computer-executable instructions for implementing a control method of a household energy storage system as in any of the second aspects of the present disclosure when executed by a processor.
According to the control device of the household energy storage system, the executor module is arranged among the household energy storage converter, the power grid and the household load, so that the connection relation between the household energy storage system and the power grid can be automatically regulated and controlled, when any one of the power grid and the household energy storage system fails, the continuous operation of a micro-grid where the household energy storage system is located can be ensured, the fault tolerance of the micro-grid is improved, the robustness of the micro-grid is further improved, and the micro-grid has self-discipline capability; and the sampling module and the communication module are independently connected with the household energy storage system, so that a control system is not required to be constructed in a power grid, the communication burden of the power grid is relieved, the communication reliability of the micro-power grid is improved, and the reliability of the local household energy storage system is increased.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is an application scenario diagram of a control device of a home energy storage system according to an embodiment of the present disclosure;
fig. 2a is a schematic structural diagram of a control device of a household energy storage system according to an embodiment of the present disclosure;
fig. 2b is a schematic diagram of the coordination relationship between the control device provided in the embodiment shown in fig. 2a and the household energy storage system, and the power grid;
FIG. 2c is a schematic diagram of the sampling module provided in the embodiment shown in FIG. 2 a;
FIG. 2d is a schematic illustration of the actuator configuration provided in the embodiment of FIG. 2 a;
FIG. 3 is a flow chart of a method of controlling a household energy storage system according to yet another embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a control apparatus according to still another embodiment of the present disclosure.
Specific embodiments of the present disclosure have been shown by way of the above drawings and will be described in more detail below. These drawings and the written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the disclosed concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
The following describes the technical solutions of the present disclosure and how the technical solutions of the present disclosure solve the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present disclosure will be described below with reference to the accompanying drawings.
With the development of new energy technologies such as photovoltaic, wind power and the like, by arranging power generation devices such as photovoltaic cells, wind motors and the like in a household scene, after power generation, power is supplied to household loads and stored energy is formed into a micro-grid, and the micro-grid is connected with an existing power grid, so that daily requirements of families can be met, and the micro-grid can be matched with the regulation and control of the existing power grid, and therefore the micro-grid becomes an increasingly important research field.
The household energy storage system comprises the power generation devices and the energy storage converter, wherein the household energy storage converter has the basic function of carrying out energy change processing on the current generated by the power generation devices so as to supply power to household loads, and meanwhile, the household energy storage converter is used for managing the electric quantity of the energy storage battery and is also connected with a power grid so as to enable the redundant electric quantity to be connected with the power grid through the power grid when the power generation devices generate electricity sufficiently, so that additional benefits are brought.
In the related art, the monitoring and management equipment of the household energy storage system including the household energy storage converter is mainly realized through an energy management system, the energy management system is required to be arranged in a power grid so as to monitor the running states of the household energy storage systems in a plurality of micro power grids simultaneously through an energy management gateway, but the energy management system is required to communicate data with the household energy storage systems simultaneously, the communication pressure is high, the fault alarm function can only be realized, and after any part of the household energy storage system fails, the other parts of the household energy storage system cannot be maintained to work continuously, so that the controllability and the stability are seriously insufficient.
In order to solve the above-mentioned problem, the disclosed embodiments provide a control device for a household energy storage system, which is configured with a control device that is separately matched with each household energy storage system, and controls each part based on the working state of the household energy storage system, so as to effectively ensure the controllability of the household energy storage system and the stability against faults.
The application scenario of the embodiments of the present disclosure is explained below:
fig. 1 is an application scenario diagram of a control device of a household energy storage system according to an embodiment of the present disclosure. As shown in fig. 1, the control device 100 monitors the operation states of the household energy storage converter 110 and the power grid 120, and switches the devices of the household load 130 function to ensure continuous and stable operation of the system as a whole.
It should be noted that, in the scenario shown in fig. 1, the control device, the energy storage converter, the power grid, and the household load are only illustrated as an example, but the disclosure is not limited thereto, that is, the number of the control device, the energy storage converter, the power grid, and the household load may be arbitrary.
The control device of the household energy storage system provided by the present disclosure is described in detail below through specific embodiments. It should be noted that the following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
Fig. 2a is a schematic structural diagram of a control device of a household energy storage system according to an embodiment of the present disclosure, and as shown in fig. 2a, the control device 200 includes:
a calculation module 210, a sampling module 220, a communication module 230, an actuator module 240, and a power module 250;
the actuator module 240 includes an actuator controller 241 and actuators 242 disposed on the first branch 301, the second branch 302, and the third branch 303, respectively, of the household energy storage system 300; wherein, the actuator 242 is used for switching the on state of the branch where the actuator 242 is located, the actuator controller 241 is used for controlling the switching state of the actuator 242, the first branch 301 is used for connecting the power grid 310 and the energy storage converter 304 in the household energy storage system 300, the second branch 302 is used for connecting the energy storage converter 304 and the household load 305 in the household energy storage system 300, and the third branch actuator is used for connecting the power grid 310 and the household load 305;
The sampling module 220 is respectively connected with two ends of the actuator 242 on the first branch 301, and the sampling module 220 is used for collecting signal data of the energy storage converter 304 and the power grid 310;
the communication module 230 is connected with a communication interface of the energy storage converter 304, and the communication module 230 is used for obtaining state information of the energy storage converter;
the computing module 210 is respectively connected with the communication module 230, the sampling module 220 and the execution controller 241, and the computing module 210 is configured to determine an operation state of the household energy storage system 300 and the power grid 310 according to the signal data and the state information, determine a corresponding state control command based on the operation state, and output the corresponding state control command to the execution controller 241;
the power module 250 is electrically connected to the computing module 210, the sampling module 220, the communication module 230, and the actuator module 240, respectively.
Specifically, the computing module 210 manages peripheral modules (such as the sampling module 220, the communication module 230, and the executor module 240) in the device, calculates and stores the collected data and the input signal, generates a state control command based on the calculation result, and outputs the state control command to the executor module 240 for execution. Alternatively, the configuration of the computing module 210 may be a Cortex-A8 high performance industrial-grade MPU, and the memory units of 512MB DDR3 and 4GB EMMC are configured.
The sampling module 220 and the calculating module 210 are connected through a high-speed ADC interface inside the control device 200, and the sampling module 220 continuously collects parameter data in the power grid in real time, such as actual voltage, current, and the like. The collected data is buffered in the calculation module 210 and applied to the calculation and generation of the state control commands.
The communication module 230 and the computing module 210 are connected through a peripheral bus inside the control device 200 and are controlled by the management of the computing module 210.
The communication module 230 communicates with the energy storage converter 304 through a CAN bus or an RS485 interface to collect state information of the energy storage converter 304 and the power grid 310 (such as a next time, normal, failure, or shutdown of the energy storage converter 304 in which working state, etc. to communicate with the calculation module 210 in time when abnormal state information such as failure, shutdown, etc. occurs, instead of waiting for analysis and judgment of sampling data, so as to quickly output and execute a corresponding state control command, and ensure stability of the household energy storage system 300), and CAN control a working mode (such as normal working or shutdown) of the energy storage converter 304 according to a policy model stored in the calculation module 210.
The communication module 230 may also connect to the cloud platform server through ethernet or 4G to synchronize the state information of the energy storage converter 304 and the related system states (such as the state of the executor module 240 in the control device 200) to the cloud platform server, and receive a control policy model sent from the cloud platform server (the control policy model includes a state information index, a corresponding threshold, and a state control command type for determining the state of the home energy storage system, where the control policy model may be different according to the power generation device and the corresponding power grid in the home energy storage system applicable to wind power, photovoltaic power generation, etc., and the control policy model may be configured and recorded locally in the control device 200, or may be generated and sent by the cloud platform server through a big data model based on the received corresponding state information and the related system state information of each micro-grid.
The communication module 230 may also be communicatively connected to the execution controller 241 through a serial port, so as to output the calculation result of the calculation module 210 to the execution controller 241 through the serial port (or other communication modes).
The execution controller 241 may use an ARM microcontroller to independently control each of the actuators 242 to ensure reliability. The actuator 242 may be a circuit breaker to control the conduction of the corresponding branch.
The execution controller 241 communicates with the serial interface of the communication module 230, receives a status control command from the computing unit, and adjusts the operation status of each of the actuators 242.
The power module 240 provides stable and reliable power supply to the above modules.
Further, as shown in fig. 2b, the coordination relationship between the control device and the household energy storage system, and the coordination relationship between the control device and the household energy storage system are shown in fig. 2c, and the control device are structural schematic diagrams of the sampling module. Referring to fig. 2b and fig. 2c, the sampling module 220 includes a differential voltage sampling circuit 221, where the differential voltage sampling circuit 221 is connected to the computing module 210 and the ac grid end inlet interface and the grid inlet interface of the energy storage converter 304, and the differential voltage sampling circuit 221 is configured to collect signal data of the power grid through the grid inlet interface and collect signal data of the energy storage converter 304 through the ac grid end inlet interface.
Specifically, the sampling module 220 performs signal acquisition on the incoming line interface of the power grid 310 and the incoming line interface of the energy storage converter 304, respectively. So that the calculation module 210 determines whether the power grid 310, the energy storage converter 304, etc. have faults according to the collected signal data.
Alternatively, as shown in fig. 2d, it is a schematic structural diagram of the actuator. Referring to fig. 2d, the actuator 242 includes a combination switch 243 including two pairs of relays 244 connected in parallel with each other, and the two pairs of relays 244 are connected in series with each other; the relay 244 is connected to the execution controller 241.
Specifically, by arranging two pairs of relays 244, redundancy protection of corresponding lines is realized, so that when any one of the relays 244 connected in parallel fails, the reliability of the lines can be ensured, and meanwhile, the switching function of the relays 244 can be conveniently detected in a fault manner, so that the normal operation of the whole actuator 242 is ensured.
The specific principle is as follows:
when the line on which the actuator 242 is located is turned on, at this time, one of the two pairs of relays 244 is in a turned-on state, at this time, the other of the two pairs of relays 244 can be subjected to open-close detection, and if the open-close action can be performed normally (the open-close of the detected relay 244 obviously does not affect the conduction of the line), it is indicated that the detected relay 244 is in a normal working state.
When the line where the actuator 242 is located is opened, if any pair of relays 244 is in an open state, then the other pair of relays 244 can be monitored to be opened and closed, and if the opening and closing actions can be performed normally (the opening and closing of the detected relays 244 obviously does not affect the opening of the line), the detected relays 244 are indicated to be in a normal working state.
Optionally, the relay 244 includes a main contact 245 and an auxiliary contact 246, and the execution controller 241 further includes a fault detection module (not shown in the figure), the main contact 245 of the relay 244 is connected to the execution controller 241, the auxiliary contact 246 is connected to the fault detection module, and the fault detection module is connected to the calculation module 210.
Specifically, by providing the auxiliary contact 246, in the foregoing fault detection, whether the corresponding relay 244 is normally opened or closed can be detected by the fault detection module 247, so as to determine whether it is in a normal operating state.
Optionally, the communication module 230 is communicatively connected to the control server, and the communication module 230 is configured to receive the control policy information sent by the control server, and send the control policy information to the calculation module 210, where the calculation module is configured to determine the state control command based on the control policy information, the running states of the household energy storage system 300 and the power grid 310.
Specifically, the control server is the cloud platform server, and the control policy information is the control policy model, so that details are not repeated here.
Further, the control device 200 may further include an independent input module to locally input control policy information, so as to implement personalized control on the micro-grid, and further ensure stability and reliability of the household energy storage system.
The control strategy information that is locally input, considering the influence of different environments, may include a timing strategy and a known fault handling strategy, where the timing strategy is to assign a power grid 310 demand response, and to regulate and control power distribution to the energy storage converters 304 of the node. The regulation strategy of power distribution (included in the fixed strategy) may be issued by the control device 200 to the energy storage converter 304 in real time, or may be issued in advance to meet different response requirements.
When the energy storage converter 304 nodes in the micro grid are scaled, scale effects can be brought, the desired controllability of the grid 304 response is met, and benefits are brought to users. The known fault handling policy is to calculate at the real-time edge of the node where the control device 200 is located, process and determine the state information and signal data of the local node, isolate or protect the fault that has occurred, and perform known execution operation to solve the local security problem.
In practical applications, the communication module 230 may support various network interfaces according to practical situations, and may cooperate with the calculation module 210 to support local load balancing management and discrete processing of data such as status information when there are multiple home energy storage converters 304 in the micro-grid.
Optionally, the control device 200 of the household energy storage system further comprises: a storage module 250, and/or an expansion storage module 260; the storage module 250 is used for caching state information, signal data and state control commands; the expansion storage module 260 is used to store the data buffered in the storage module 250.
Specifically, the storage module 250 is configured to cooperate with the computing module 210 to implement a fast cache of data related to the computing module 210, and the expansion storage module 260 is complementary to the storage module 250, and may be configured as a large-capacity detachable memory card, which is connected to the computing module 210 through a bus inside the control device 200. The extended storage module 260 is further configured to store the cached data in the sampling module 220 in a persistent manner, and when the computing module 210 determines that a fault occurs, copy the cached data in the storage module 250 to the extended storage module 260 for persistent storage.
The cache of the related data in the storage module 250 is a finite time cache, and once a fault is triggered, the data before and after the fault is independently stored (for example, stored in the expansion storage module 260) so as to be used for operation and maintenance diagnosis, fault point data analysis and the like, and meanwhile, a data source is brought to the data analysis of the cloud platform server, so that a control strategy model and a state control command can be optimized. Thus, the problem of high operation and maintenance difficulty can be solved, so that the household energy storage system 300 can have sustainable optimization capability.
When the household energy storage system 300 is accessed to the cloud platform server through the control device 200, access network CDN nodes can be configured according to different access regions so as to realize load balancing management of the cloud platform server.
The cloud platform server can uniformly pair all the accessed control devices 200 through the clock NTP, the control devices 200 discretely report the acquired signal data and state information according to the real time, and the priority of different types of data configured by the cloud platform server can also report the data integrally after buffering, so that the communication burden is reduced.
According to the control device for the household energy storage system, the executor module is arranged among the household energy storage converter, the power grid and the household load, so that the connection relation between the household energy storage system and the power grid can be automatically regulated and controlled, when any one of the power grid and the household energy storage system fails, the continuous operation of a micro-grid where the household energy storage system is located can be ensured, the fault tolerance capability of the micro-grid is improved, the robustness of the micro-grid is further improved, and the micro-grid has self-discipline capability; and the sampling module and the communication module are independently connected with the household energy storage system, so that a control system is not required to be constructed in a power grid, the communication burden of the power grid is relieved, the communication reliability of the micro-power grid is improved, and the reliability of the local household energy storage system is increased.
Fig. 3 is a flow chart of a control device of a household energy storage system provided by the present disclosure. As shown in fig. 3, the control device of the household energy storage system provided in this embodiment includes the following steps:
step S301, signal data of the energy storage converter and the power grid acquired by the sampling module are acquired, and state information of the energy storage converter acquired by the communication module is acquired.
The sampling module can collect signal data at regular time to monitor working states of the energy storage converter and the power grid, such as signal data of power grid voltage fluctuation, and further judge the working states.
The communication module is mainly used for collecting state information of whether the state transformation occurs between the energy storage converter and the power grid, such as the stop of the energy storage converter, and through the state information, whether the household energy storage system is in a special state or not can be judged more quickly, and the household energy storage system responds timely.
Step S302, determining an operation state of the energy storage converter, the power grid and the actuator module based on the signal data and the state information.
Specifically, through signal data and state information, and in combination with a control strategy model, the operation states of the energy storage converter, the power grid and the actuator can be judged. If the energy storage converter outputs state information corresponding to a specific fault, the running state of the energy storage converter can be determined to be the fault, after an opening command is sent to the actuator, the current of the corresponding branch is not returned to zero, and the fault of the corresponding actuator is indicated.
Step S303, determining a corresponding state control command based on the operation states of the energy storage converter, the power grid and the executor module.
Specifically, in combination with the control policy model and the above operation state, the calculation module may determine a state control command to be generated, and since there are multiple conditions in the operation state, the state control command will also change accordingly, so this section is specifically described below:
and if the running states of the energy storage converter, the power grid and the executor module are normal running states, determining a state control command to keep the first branch and the second branch in a conducting state, and keeping the third branch in a disconnecting state.
Specifically, when the related devices are in normal operation states, the energy storage converter can transmit power to the power grid (i.e., the first branch needs to be conducted), and supply energy to the household load (i.e., the second branch needs to be conducted), without communication between the power grid and the household load (i.e., the third branch needs to be disconnected).
And B, if the running states of the energy storage converter, the power grid and the executor module are all fault states, determining that the state control command is to disconnect the first branch and the second branch, and switching the third branch to a conducting state.
Specifically, when any device fails, the connection between the energy storage converter and the household load and the power grid needs to be disconnected, so that the stable operation of the power grid and the household load is prevented from being influenced by the device failure.
Further, consider that the control device of the household energy storage system further comprises an alarm module connected with the calculation module; the fault state may be further subdivided:
and in the state B1, if the power grid is in a fault state and the energy storage converter and the executor module are in a normal operation state, determining that the state control command is to disconnect the first branch and the third branch, keeping the second branch in a conducting state, and enabling the alarm module to generate first type alarm information.
Specifically, the first type of alarm information is alarm information corresponding to a power grid side fault. If a power grid fault occurs, such as serious signal fluctuation on the power grid side, the energy storage converter cannot continue to transmit power to the power grid (so that the first branch is disconnected, and meanwhile, the third branch is kept disconnected), so that safety of the energy storage converter is ensured, and meanwhile, the energy storage converter also can continue to supply power to the household load (namely, the second branch is kept in a conducting state).
And a state B2, if the energy storage converter is in a fault state and the power grid and the executor module are in a normal operation state, determining that the state control command is to disconnect the first branch and the second branch, keeping the third branch in a conducting state, and enabling the alarm module to generate second-type alarm information.
Specifically, the second type of alarm information is alarm information of a fault corresponding to the energy storage converter. Such as a critical fault, loss of signal connection or communication fault of the energy storage converter, the household load should be directly connected to the grid (i.e. the first branch and the second branch are disconnected, and the third branch is kept in a conductive state).
And a state B3, if the execution controller in the executor module is in a fault state and the energy storage converter and the power grid are in a normal running state, determining that the state control command is to disconnect the first branch and the second branch, keeping the third branch in a conducting state, and enabling the alarm module to generate third type alarm information.
Specifically, the third type of alarm information aims at executing the controller fault, and at the moment, the direct power grid is tried to supply power to the household load (because the energy storage converter and the household load have more actuators, when the executing controller fault, other state control commands are easier to cause the fault), and the maintenance is performed in time.
And a state B4, if the executor in the executor module is in a fault state and the energy storage converter and the power grid are in a normal running state, determining a state control command to keep the first branch and the second branch in a conducting state, keeping the third branch in a disconnecting state, and enabling the alarm module to generate fourth type alarm information.
Specifically, the third type of alarm information is directed to hardware failure of the actuator, at this time, it is not necessary to control actuator change (because of failure or execution of change command) any more, and then wait for intervention of maintenance personnel.
And a state B5, if any one of the energy storage converter, the power grid and the executor module is determined not to be in a fault state and to be in an abnormal operation state based on the control strategy information, determining a state control command to enable the alarm module to generate fifth type alarm information.
Specifically, in the additional case, if the control policy information sets a threshold condition for distinguishing a slight fault state (i.e., an abnormal operation state) from a fault state, only an alarm message needs to be generated in the slight fault state, so as to inform related personnel of timely performing maintenance treatment.
Therefore, the whole system can support real-time replacement of the fault relay in the operation process, overhaul the equipment without influencing the continuous operation of the whole system, and simultaneously, when the fault recovery is detected, a preset fault recovery processing strategy can be automatically executed, namely, each actuator is switched to a normal operation state, and the corresponding alarm is closed.
Step S304, outputting a corresponding state control command to an execution controller in the executor module.
Specifically, after the control command is determined, a corresponding command may be sent to the execution controller to maintain the continuous operation of the whole system, thereby ensuring the overall stability of the system. After maintenance personnel finish maintenance, fault recovery can be detected, and the system is restored at the moment, so that the whole system has higher robustness.
According to the control method of the household energy storage system, whether equipment in the system is in a fault state is timely determined through the collected signal data and the state information, and a corresponding state control command is generated and output, so that the system is switched to a state capable of continuously running. Therefore, no matter what state the structure of the power grid, the energy storage converter, the actuator and the like is, the continuous operation of the whole system can be guaranteed not to be influenced, the self-isolation and recovery are realized, and the autonomous function of the device is realized.
Fig. 4 is a schematic structural diagram of a control apparatus provided in the present disclosure, and as shown in fig. 4, the control apparatus 400 includes: a memory 410 and a processor 420.
Wherein the memory 410 stores a computer program executable by the at least one processor 420. The computer program is executed by the at least one processor 420 to cause the control device to implement the control means of the household energy storage system as provided in any of the embodiments above.
Wherein the memory 410 and the processor 420 may be connected by a bus 430.
The relevant descriptions and effects corresponding to the relevant description and effects corresponding to the method embodiments may be understood, and are not repeated herein.
An embodiment of the present disclosure provides a computer-readable storage medium having stored thereon a computer program that is executed by a processor to implement a control apparatus of a household energy storage system as in the corresponding embodiment of fig. 3.
The computer readable storage medium may be, among other things, ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
One embodiment of the present disclosure provides a computer program product containing computer-executable instructions for implementing the control means of the household energy storage system of the corresponding embodiment of fig. 3 when executed by a processor.
It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of action combinations, but it should be understood by those skilled in the art that the present application is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all alternative embodiments, and that the acts and modules referred to are not necessarily required in the present application.
It should be further noted that, although the steps in the flowchart are sequentially shown as indicated by arrows, the steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least a portion of the steps in the flowcharts may include a plurality of sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order in which the sub-steps or stages are performed is not necessarily sequential, and may be performed in turn or alternately with at least a portion of the sub-steps or stages of other steps or other steps.
It should be understood that the above-described device embodiments are merely illustrative, and that the device of the present application may be implemented in other ways. For example, the division of the units/modules in the above embodiments is merely a logic function division, and there may be another division manner in actual implementation. For example, multiple units, modules, or components may be combined, or may be integrated into another system, or some features may be omitted or not performed.
In addition, each functional unit/module in each embodiment of the present application may be integrated into one unit/module, or each unit/module may exist alone physically, or two or more units/modules may be integrated together, unless otherwise specified. The integrated units/modules described above may be implemented either in hardware or in software program modules.
The integrated units/modules, if implemented in hardware, may be digital circuits, analog circuits, etc. Physical implementations of hardware structures include, but are not limited to, transistors, memristors, and the like. The processor may be any suitable hardware processor, such as CPU, GPU, FPGA, DSP and ASIC, etc., unless otherwise specified. Unless otherwise indicated, the storage elements may be any suitable magnetic or magneto-optical storage medium, such as resistive Random Access Memory RRAM (Resistive Random Access Memory), dynamic Random Access Memory DRAM (Dynamic Random Access Memory), static Random Access Memory SRAM (Static Random-Access Memory), enhanced dynamic Random Access Memory EDRAM (Enhanced Dynamic Random Access Memory), high-Bandwidth Memory HBM (High-Bandwidth Memory), hybrid Memory cube HMC (Hybrid Memory Cube), etc.
The integrated units/modules may be stored in a computer readable memory if implemented in the form of software program modules and sold or used as a stand-alone product. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a memory, including several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned memory includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments. The technical features of the above embodiments may be combined in any way, and for brevity, all of the possible combinations of the technical features of the above embodiments are not described, but should be considered as the scope of the description
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A control device of a household energy storage system, characterized in that the control device of the household energy storage system comprises:
the device comprises a calculation module, a sampling module, a communication module, an actuator module and a power supply module;
the actuator module comprises an execution controller and actuators respectively arranged on the first branch, the second branch and the third branch; the system comprises an actuator, an execution controller, a power grid, a household energy storage system, a household load and a household controller, wherein the actuator is used for switching the conduction state of the branch, the execution controller is used for controlling the switching state of the actuator, the first branch is used for connecting the power grid and the energy storage converter in the household energy storage system, the second branch is used for connecting the energy storage converter and the household load in the household energy storage system, and the third branch actuator is used for connecting the power grid and the household load;
The sampling module is respectively connected with two ends of the actuator on the first branch and is used for collecting signal data of the energy storage converter and the power grid;
the communication module is connected with a communication interface of the energy storage converter and is used for acquiring state information of the energy storage converter;
the computing module is respectively connected with the communication module, the sampling module and the execution controller, and is used for determining the running states of the household energy storage system and the power grid according to the signal data and the state information, determining corresponding state control commands based on the running states and outputting the corresponding state control commands to the execution controller;
the power module is electrically connected with the calculation module, the sampling module, the communication module and the executor module respectively.
2. The control device of a household energy storage system according to claim 1, wherein the sampling module comprises a differential voltage sampling circuit, the differential voltage sampling circuit is respectively connected with the computing module, an ac grid end incoming line interface and a grid incoming line interface of the energy storage converter, and the differential voltage sampling circuit is used for collecting signal data of the power grid through the grid incoming line interface and collecting signal data of the energy storage converter through the ac grid end incoming line interface.
3. The control device of a household energy storage system as claimed in claim 2, wherein the actuator comprises a combination switch comprising two pairs of relays connected in parallel with each other, the two pairs of relays being connected in series with each other; the relay is connected with the execution controller.
4. A control device for a household energy storage system as in claim 3, wherein said relay comprises a main contact and an auxiliary contact, said actuator controller further comprises a fault detection module,
the main contact of the relay is connected with the execution controller, the auxiliary contact is connected with the fault detection module, and the fault detection module is connected with the calculation module.
5. The control device of a household energy storage system as claimed in any one of claims 1 to 4, wherein the communication module is communicatively connected to a control server, and is configured to receive control policy information sent by the control server and send the control policy information to the calculation module,
the computing module is used for determining the state control command based on the control strategy information, the running states of the household energy storage system and the power grid.
6. The control device of a household energy storage system as claimed in any one of claims 1 to 4, further comprising:
a storage module and/or an expansion storage module;
the storage module is used for caching the state information, the signal data and the state control command;
the expansion storage module is used for storing the data cached in the storage module.
7. A control method of a household energy storage system is characterized by being applied to the control device of the household energy storage system of any one of claims 1 to 6,
the method comprises the following steps:
acquiring signal data of the energy storage converter and the power grid acquired by the sampling module, and acquiring state information of the energy storage converter acquired by the communication module;
determining an operating state of the energy storage converter, the power grid and the actuator module based on the signal data and the state information;
determining a corresponding state control command based on the operating states of the energy storage converter, the power grid and the actuator module;
and outputting a corresponding state control command to an execution controller in the executor module.
8. The method of claim 7, wherein the determining a corresponding state control command based on the operating states of the energy storage converter, the power grid, and an actuator module comprises:
If the operation states of the energy storage converter, the power grid and the executor module are normal operation states, determining that the state control command is to keep the first branch and the second branch in a conducting state, and the third branch in a disconnecting state;
if the operation states of the energy storage converter, the power grid and the executor module are all fault states, determining that the state control command is to disconnect the first branch and the second branch, and switching the third branch to a conducting state.
9. The method of claim 8, wherein the control device of the household energy storage system further comprises an alarm module connected to the calculation module;
if the operation states of the energy storage converter, the power grid and the executor module are all fault states, determining the state control command to disconnect the first branch and the second branch and switch the third branch to a conducting state includes:
if the power grid is in a fault state and the energy storage converter and the executor module are in a normal running state, determining that the state control command is to disconnect the first branch and the third branch, keeping the second branch in a conducting state, and enabling the alarm module to generate first type alarm information;
If the energy storage converter is in a fault state and the power grid and the executor module are in a normal running state, determining that the state control command is to disconnect the first branch and the second branch, keeping the third branch in a conducting state, and enabling the alarm module to generate second-type alarm information;
if the execution controller in the executor module is in a fault state and the energy storage converter and the power grid are in a normal running state, determining that the state control command is to disconnect the first branch and the second branch, keeping the third branch in a conducting state, and enabling the alarm module to generate third type alarm information;
if the actuator in the actuator module is in a fault state and the energy storage converter and the power grid are in a normal running state, determining that the state control command is to keep the first branch and the second branch in a conducting state, keep the third branch in a disconnecting state, and enable the alarm module to generate fourth type alarm information.
10. The method of claim 9, wherein if the operating states of the energy storage converter, the power grid, and the actuator module are all fault states, determining the state control command to disconnect the first leg and the second leg, and switching the third leg to the on state comprises:
And if any one of the energy storage converter, the power grid and the executor module is not in a fault state and is in an abnormal operation state based on the control strategy information, determining the state control command to enable the alarm module to generate fifth type alarm information.
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