Control method, system and equipment of energy storage system and medium

Abstract

The invention belongs to the field of energy storage, and particularly provides a control method, system and equipment of an energy storage system and a medium, and the method comprises the following steps: 1, calculating the reactive power currently injected into a power grid by a power conversion device; 2, calculating the power deviation between the reactive power currently injected into the power grid by the power conversion device and the target reactive power of the power grid; determining a power grid fluctuation condition according to the obtained power deviation; 3, judging whether to perform power compensation on the power grid or not according to the fluctuation condition of the power grid, performing power compensation on the power grid when the fluctuation of the power grid exceeds the limit, otherwise, not performing power compensation on the power grid; the fluctuation condition of the power grid voltage is judged according to the operation parameters of the converter transformer, response is made in time based on the fluctuation condition of the power grid, power compensation is conducted on the power converter in the system in time, and the accuracy and reliability of system control are improved.

Description

Technical Field

[0001] The present invention belongs to the field of energy storage, and in particular relates to a control method, system, equipment and medium of an energy storage system. Background Art

[0002] Energy storage system, usually refers to an energy storage system / device directly connected to a high-voltage AC grid, rather than through a traditional low-voltage or medium-voltage grid. This design allows the energy storage system / device to operate at a higher voltage level, thereby reducing losses during energy transmission and improving the efficiency and response speed of the system. High-voltage operation enables the energy storage system / device to respond to grid demand more quickly and provide the necessary active and reactive power support. In the prior art, power control is usually based on static parameters, and this method cannot respond to grid fluctuations in a timely manner. Summary of the invention

[0003] The purpose of the present invention is to provide a control method, system, device and medium for an energy storage system, which solves the defect in the prior art that power control based on static parameters cannot respond promptly to fluctuations in the power grid.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a control method for an energy storage system, comprising the following steps: Step 1, calculating the reactive power currently injected into the power grid by the power conversion device; Step 2, calculating the power deviation between the reactive power currently injected into the power grid by the power conversion device and the target reactive power of the power grid; determining the power grid fluctuation according to the obtained power deviation; Step 3: determine whether to perform power compensation on the grid according to the grid fluctuation situation. When the grid fluctuation exceeds the limit, power compensation is performed on the grid. Otherwise, there is no need to perform power compensation on the grid.

[0005] Preferably, in step 1, the reactive power currently injected into the power grid by the power conversion device is calculated using the following formula:

[0006] in, Indicates the reactive power currently injected into the grid by the power conversion device. Indicates the current output voltage of the power conversion device. Indicates the current of the power conversion device. Indicates the phase difference between the current of the power conversion device and the voltage of the power conversion device.

[0007] Preferably, in step 2, The power grid fluctuation is determined based on the obtained power deviation, where: When the power deviation is greater than or equal to the set power deviation threshold, the power grid fluctuation exceeds the limit; When the power deviation is less than the set power deviation threshold, the grid fluctuation is normal.

[0008] Preferably, in step 2, the power grid fluctuation is determined according to the obtained power deviation, and the specific method is: The grid frequency deviation and grid voltage deviation are calculated respectively; The obtained grid frequency deviation, grid voltage deviation and power deviation are used to calculate the comprehensive evaluation index of grid fluctuation; The grid fluctuation situation is determined using the comprehensive evaluation index of grid fluctuation obtained, where: When the comprehensive evaluation index of the power grid fluctuation is greater than or equal to the preset threshold, the power grid fluctuation exceeds the limit; When the comprehensive evaluation index of the power grid fluctuation is less than the preset threshold, the power grid fluctuation is normal.

[0009] Preferably, in step 3, power compensation is performed on the power grid, and the specific method is: Obtain target reactive power of the power grid; Calculate the reactive power that needs to be compensated for the power grid according to the obtained target reactive power of the power grid; Reactive power compensation is performed on the power grid according to the reactive power that needs to be compensated.

[0010] Preferably, the target reactive power of the power grid is obtained by the following formula:

[0011] in, represents the target reactive power, Indicates the reactive power required by the grid load, represents the reactive power loss in the grid, Indicates the reactive power margin, Indicates the reactive power provided by the generator sets in the power grid.

[0012] Preferably, the target reactive power of the power grid is obtained by the following formula:

[0013] in, Indicates at time The control input, , and Represent the proportional, integral and differential gains respectively, represents the error signal, is the error signal from 0 to The integral of is the error signal at time The derivative of .

[0014] A control system for an energy storage system, based on the control method, comprises: A reactive power calculation unit, used to calculate the reactive power currently injected into the power grid by the power conversion device; A power grid fluctuation confirmation unit is used to calculate the power deviation between the reactive power currently injected into the power grid by the power conversion device and the target reactive power of the power grid; and determine the power grid fluctuation situation according to the obtained power deviation; The power compensation unit is used to determine whether to perform power compensation on the power grid according to the power grid fluctuation situation. When the power grid fluctuation exceeds the limit, power compensation is performed on the power grid. Otherwise, there is no need to perform power compensation on the power grid.

[0015] A computer device comprising: a processor suitable for executing a computer program; A computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the method described is performed.

[0016] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method described above is implemented.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides an energy storage system, in which an energy storage device is connected to a DC bus in parallel through a plurality of power units, and is connected to a converter transformer through a power converter; the output of the converter transformer is connected to a power grid; and the system also includes a power compensation module, which is used to obtain power grid fluctuations according to the operating parameters of the converter transformer, perform power compensation on the power converter based on the fluctuations, judge the fluctuation of the power grid voltage according to the operating parameters of the converter transformer, and respond in time based on the power grid fluctuations, and perform power compensation on the power converter in the system in time, thereby improving the accuracy and reliability of system control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0019] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0020] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0021] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0022] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0023] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0024] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0025] Example 1 like Figure 1 , Figure 2As shown, this embodiment relates to an energy storage system, which includes an energy storage device and a power conversion device (PCS), wherein: the energy storage device is connected to the power conversion device; and the output end of the power conversion device is connected to a power grid.

[0026] The energy storage device includes a plurality of battery packs connected in series, the battery packs at the ends are connected to power units, the energy storage device is connected to a power conversion device (PCS) through the plurality of power units, and is connected to a power grid through the power conversion device (PCS).

[0027] The system also includes a power compensation module, which is used to obtain power grid fluctuation conditions according to the operating parameters of the power conversion device, and perform power compensation on the power grid based on the fluctuation conditions.

[0028] The present application determines the fluctuation of the grid voltage according to the operating parameters of the power conversion device, and responds promptly based on the grid fluctuation, performs timely power compensation on the grid, and improves the accuracy and reliability of system control.

[0029] Example 2 This embodiment provides an energy storage system. Figure 1 The overall structure diagram of the energy storage system is shown in FIG. Figure 1 As shown, the energy storage system includes an energy storage device, a power converter and a power conversion device, wherein: The energy storage device is connected to the power conversion device through a power converter; the output end of the power conversion device is connected to the power grid.

[0030] The energy storage device includes three phases corresponding to the three-phase power grid, each phase is composed of N groups of power modules connected in series, each group of power modules includes multiple battery groups connected in series and corresponding power units, and the power unit can adopt, for example, a DC / DC conversion circuit. The energy storage device is connected to a DC bus in parallel through multiple power units, and the DC bus is connected to a power conversion device through a power converter, and the output of the power conversion device is connected to the power grid.

[0031] Example 3 Based on Example 2, this example provides an energy storage system, wherein the power converter may adopt a cascaded H-bridge topology circuit. The cascaded H-bridge topology circuit is a modular multi-level converter formed by cascading multiple H-bridge units.

[0032] Example 4 Based on Example 2, this embodiment provides an energy storage system, which also includes a power compensation module, which is used to obtain power grid fluctuations according to operating parameters of the power conversion device and perform power compensation based on the power grid fluctuations.

[0033] Example 5 This embodiment provides a control method for an energy storage system. The energy storage system is the energy storage system involved in the above embodiment of the present invention. The control method can be implemented, for example, by a power compensation module in the above energy storage system. Figure 2 A flow chart of the control method of the energy storage system provided in this embodiment is shown in FIG. Figure 2 As shown, the control method includes the following steps: S1. Calculate the reactive power currently injected into the power grid by the power conversion device.

[0034] By monitoring the voltage and current of the power conversion device, the voltage output by the power conversion device to the power grid and the current of the power conversion can be obtained. The voltage and current monitoring of the power conversion device can be achieved by the voltage transformer and current transformer set on the power conversion device. Based on the obtained output voltage and current of the power conversion device, the reactive power currently injected into the power grid by the power conversion device is calculated according to the following formula:

[0035] in, Indicates the reactive power currently injected into the grid by the power conversion device. Indicates the current output voltage of the power conversion device. Indicates the current of the power conversion device. Indicates the phase difference between the current of the power conversion device and the voltage of the power conversion device.

[0036] S2. Obtaining grid fluctuation conditions according to the reactive power currently injected into the grid by the power conversion device.

[0037] Grid fluctuations may lead to grid instability. The technical solution provided in this embodiment can quickly respond to grid fluctuations through real-time monitoring of the power conversion device and provide necessary reactive power support through power compensation, thereby helping to maintain grid stability. Grid fluctuations can be determined through the following steps: S21. Calculate the power deviation between the reactive power currently injected into the power grid by the power conversion device and the target reactive power In this step, the power deviation It can be determined according to the following formula:

[0038] in, Indicates the target reactive power; is the current reactive power.

[0039] S22. Determine the power grid fluctuation according to the power deviation: like , then the power grid fluctuation is considered to be beyond the limit; like , then the power grid fluctuation is considered normal; in, Indicates the power deviation threshold.

[0040] The setting of the power deviation threshold is related to factors such as the allowable deviation of the power supply voltage of the power grid, the allowable deviation of the voltage at the power equipment end of the power grid, and the load characteristics of the power grid connection. It can be set and adjusted according to the actual needs of the power grid and the real-time monitoring data of the power grid.

[0041] In this embodiment, the power deviation between the current reactive power and the target reactive power is used to determine the grid fluctuation situation. The reactive power can be quickly acquired through the voltage and current of the power conversion device. Thus, determining the grid fluctuation situation by the power deviation can make a quick and accurate response to the grid voltage fluctuation situation.

[0042] The power deviation can also be combined with the grid voltage deviation and grid frequency deviation to comprehensively judge the grid fluctuation. For example, the following formula can be used to comprehensively judge the grid fluctuation:

[0043] in, Indicates the grid frequency deviation, which can be calculated by the difference between the actual grid frequency and the nominal grid frequency. The change of grid frequency reflects the dynamic balance state of the grid. Ideally, the grid frequency should be maintained at a stable value (for example, 50 Hz or 60 Hz). It indicates the grid voltage deviation, which can be calculated by the percentage of the difference between the actual grid voltage and the grid nominal voltage to the grid nominal voltage. The voltage deviation is a direct indicator of grid fluctuations because it reflects the degree of deviation between the grid node voltage and the nominal voltage. Represents the comprehensive evaluation index of power grid fluctuation, , and Represents the weight coefficient, which is used to adjust the importance of different factors in the comprehensive evaluation.

[0044] if If it exceeds the preset threshold, it is considered that the grid fluctuation exceeds the limit and reactive power compensation is required; if If it is lower than the preset threshold, the grid fluctuation is considered normal and no reactive power compensation is required immediately.

[0045] S3. Perform power compensation on the power grid according to the fluctuation situation.

[0046] Power compensation can be achieved by the following steps: S31. Determine the target reactive power of the power grid according to the power compensation model, wherein the target reactive power is related to the load power, the reactive power loss of the power grid, and the reactive power provided by the generator sets in the power grid. Specifically, the target reactive power is determined using the following power compensation model:

[0047] in, represents the target reactive power, Indicates the reactive power required by the grid load, represents the reactive power loss in the grid, Indicates the reactive power margin, Indicates the reactive power provided by the generator sets in the power grid.

[0048] The parameters involved in the above model and the reactive power required by the grid load can be calculated according to the following formula:

[0049] The reactive power loss in the power grid can be calculated according to the following formula:

[0050] The reactive power margin can be calculated according to the following formula:

[0051] The reactive power provided by the generator set in the power grid can be calculated according to the following formula:

[0052] in, It represents the coefficient related to the load characteristics, which can be determined by load testing and can reflect the characteristics of the load's demand for reactive power. Indicates the active power load, Indicates the phase angle of the load power factor, Represents the grid loss coefficient, which can be set according to the configuration and efficiency of the grid. Indicates the grid voltage, Represents the grid current, Indicates the phase angle of the power factor of the power grid, Represents the safety factor, which is used to determine the ratio of reactive power margin, Represents the reactive power provided by the i-th generator set.

[0053] This embodiment adopts the above-mentioned power compensation model to determine the target reactive power. The model can comprehensively evaluate the reactive power demand of the power grid and provide a relatively accurate target reactive power estimation by accurately measuring and calculating the key parameters of the power grid, taking into account multiple factors such as coefficients related to load characteristics, active power load and phase angle of load power factor, etc., so as to provide a basis for reactive power compensation and voltage control of the power grid, and dynamically adjust the target reactive power according to the real-time operating status and changes of the power grid to adapt to the fluctuations and different operating conditions of the power grid.

[0054] The required target reactive power can also be obtained through a PID control model.

[0055] In this PID control model, the control input is calculated through three terms: proportional (P), integral (I) and differential (D). The following formula can be used:

[0056] in, Indicates at time The control input, in this embodiment, refers to the reactive power that needs to be compensated, , and Represent the proportional, integral and differential gains respectively, represents the error signal, in this embodiment, it refers to the power deviation, is the error signal from 0 to The integral of is the error signal at time The derivative of the error represents the rate of change of the error. Using the PID control method for reactive power compensation can achieve cost-effectiveness and ease of operation while ensuring grid stability and power quality.

[0057] S32, calculating the reactive power to be compensated according to the determined target reactive power and the power deviation. In this step, the reactive power to be compensated can be calculated by the following formula:

[0058] in, Indicates the reactive power that needs to be compensated. Indicates the compensation coefficient.

[0059] Performing reactive power compensation on the power converter according to the reactive power to be compensated may include the following steps: According to the obtained reactive power that needs to be compensated and the real-time data of the power grid, it is determined whether the reactive power output needs to be increased or reduced, and according to the reactive power that needs to be compensated, the control parameters of the power converter, such as the pulse width modulation (PWM) signal, are adjusted to change the phase and size of the output current to achieve reactive power compensation.

[0060] The technical solution provided in this embodiment determines the fluctuation of the grid voltage according to the operating parameters of the power conversion device, and responds promptly based on the grid fluctuation to perform timely power compensation on the grid, thereby improving the accuracy and reliability of system control.

[0061] Example 6 This embodiment provides a control system for an energy storage system, including: A reactive power calculation unit, used to calculate the reactive power currently injected into the power grid by the power conversion device; A power grid fluctuation confirmation unit, used to confirm power grid fluctuation conditions according to the reactive power currently injected into the power grid by the power conversion device; The power compensation unit is used to determine whether to perform power compensation on the power grid according to the power grid fluctuation situation. When the power grid fluctuation exceeds the limit, power compensation is performed on the power grid. Otherwise, there is no need to perform power compensation on the power grid.

[0062] Example 7 This embodiment 7 provides a computer device, including: a memory for storing a computer program; and a processor for implementing the steps of a computer method when executing the computer program.

[0063] When the processor executes the computer program, the steps of the above computer method are implemented.

[0064] Alternatively, when the processor executes the computer program, the functions of each module in the above system are realized. The computer device may be a computing device such as a desktop computer, a notebook, a PDA, and a cloud server. The computer device may include, but is not limited to, a processor and a memory. Those skilled in the art will appreciate that the above are examples of computer devices and do not constitute a limitation on computer devices. The computer device may include more components than the above, or a combination of certain components, or different components. For example, the computer device may also include input and output devices, network access devices, buses, etc.

[0065] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the computer device, and uses various interfaces and lines to connect various parts of the entire computer device.

[0066] The memory may be used to store the computer programs and / or modules, and the processor implements various functions of the computer device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory.

[0067] The memory may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMediaCard, SMC), a secure digital (SecureDigital, SD) card, a flash card (FlashCard), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0068] Example 8 This embodiment 8 also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps of the method described are implemented.

[0069] If the module / unit integrated in the computer system is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.

[0070] Based on such understanding, the present invention implements all or part of the processes in the above method, and can also be completed by instructing related hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the above computer method can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or preset intermediate form, etc.

[0071] The computer-readable storage medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc.

[0072] It should be noted that the content contained in the computer-readable storage medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media do not include electrical carrier signals and telecommunication signals.

[0073] Example 9 This embodiment 9 provides a computer product, which includes a computer program, and the computer program is stored in a computer-readable storage medium; the processor of the computer device reads the computer program from the computer-readable storage medium, and the processor executes the computer program, so that the computer device can execute the method in embodiment 1, which will not be repeated here.

[0074] It should be noted that a person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing related hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods.

[0075] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A control method for an energy storage system, characterized in that: The following steps are involved: Step 1, calculating the reactive power currently injected into the power grid by the power conversion device; Step 2, calculating the power deviation between the reactive power currently injected into the power grid by the power conversion device and the target reactive power of the power grid; determining the power grid fluctuation according to the obtained power deviation; Step 3: determine whether to perform power compensation on the grid according to the grid fluctuation situation. When the grid fluctuation exceeds the limit, power compensation is performed on the grid. Otherwise, there is no need to perform power compensation on the grid.

2. A control method for an energy storage system according to claim 1, characterized in that: In step 1, the reactive power currently injected into the grid by the power conversion device is calculated using the following formula: in, Indicates the reactive power currently injected into the grid by the power conversion device. Indicates the current output voltage of the power conversion device. Indicates the current of the power conversion device. Indicates the phase difference between the current of the power conversion device and the voltage of the power conversion device.

3. The control method of an energy storage system according to claim 1, characterized in that: In step 2, The power grid fluctuation is determined based on the obtained power deviation, where: When the power deviation is greater than or equal to the set power deviation threshold, the power grid fluctuation exceeds the limit; When the power deviation is less than the set power deviation threshold, the grid fluctuation is normal.

4. The control method of an energy storage system according to claim 1, characterized in that: In step 2, the power grid fluctuation is determined based on the obtained power deviation. The specific method is: The grid frequency deviation and grid voltage deviation are calculated respectively; The obtained grid frequency deviation, grid voltage deviation and power deviation are used to calculate the comprehensive evaluation index of grid fluctuation; The grid fluctuation situation is determined using the comprehensive evaluation index of grid fluctuation obtained, where: When the comprehensive evaluation index of the power grid fluctuation is greater than or equal to the preset threshold, the power grid fluctuation exceeds the limit; When the comprehensive evaluation index of the power grid fluctuation is less than the preset threshold, the power grid fluctuation is normal.

5. The control method of an energy storage system according to claim 1, characterized in that: In step 3, power compensation is performed on the power grid. The specific method is: Obtain target reactive power of the power grid; Calculate the reactive power that needs to be compensated for the power grid according to the obtained target reactive power of the power grid; Reactive power compensation is performed on the power grid according to the reactive power that needs to be compensated.

6. A control method for an energy storage system according to claim 5, characterized in that: The target reactive power of the power grid is obtained by the following formula: in, represents the target reactive power, Indicates the reactive power required by the grid load, represents the reactive power loss in the grid, Indicates the reactive power margin, Indicates the reactive power provided by the generator sets in the power grid.

7. The control method of an energy storage system according to claim 5, characterized in that: The target reactive power of the power grid is obtained by the following formula: in, Indicates at time The control input, , and Represent the proportional, integral and differential gains respectively, represents the error signal, is the error signal from 0 to The integral of is the error signal at time The derivative of .

8. A control system for an energy storage system, characterized in that: The control method according to any one of claims 1 to 7 comprises: A reactive power calculation unit, used to calculate the reactive power currently injected into the power grid by the power conversion device; A power grid fluctuation confirmation unit is used to calculate the power deviation between the reactive power currently injected into the power grid by the power conversion device and the target reactive power of the power grid, and determine the power grid fluctuation situation according to the obtained power deviation; The power compensation unit is used to determine whether to perform power compensation on the power grid according to the power grid fluctuation situation. When the power grid fluctuation exceeds the limit, power compensation is performed on the power grid. Otherwise, there is no need to perform power compensation on the power grid.

9. A computer device, characterized in that: include: a processor suitable for executing a computer program; A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by the processor, the method according to any one of claims 1 to 7 is performed.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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