Frequency modulation response test method, device and system of energy storage system and storage medium

Abstract

The invention relates to a frequency modulation response test method, device and system of an energy storage system and a storage medium. The method comprises the following steps: performing parameter configuration by using communication parameters of an energy storage converter and a three-phase electric meter, and simulating communication between the energy storage converter and the three-phase electric meter; constructing a first window, and reading active power data of the three-phase ammeter in real time by using the first window; a second window is constructed, a charging and discharging command of the energy storage converter is written into the second window, and the charging and discharging process of the energy storage converter is simulated; the active power data in the first window changes along with the charging and discharging process; and extracting simulation test messages of the first window and the second window, and obtaining the frequency modulation response time of the energy storage converter according to the simulation test messages. By adopting the method, remote debugging and visualization of the frequency modulation response time of the energy storage converter can be realized, and the convenience and accuracy of extracting the frequency modulation response time of the energy storage converter are improved.

Description

Technical Field

[0001] The present application relates to the field of electronic power technology, and in particular to a frequency modulation response test method, device, system and storage medium for an energy storage system. Background Art

[0002] With the development of electric energy systems, modern society has become increasingly dependent on a stable power environment. However, due to external environmental factors, power supply source factors, etc., some disturbance events often occur, resulting in unstable or changed voltage output by the power grid. In order to further improve and expand the high energy penetration rate of the power grid, energy storage converters are usually used as a means of capacity compensation, so that when there is a disturbance event in the power system, additional active power can be added or reduced within a set time period to compensate for the impact of the disturbance event on the power grid output.

[0003] Therefore, the frequency modulation response time of the energy storage converter is very critical. In the prior art, the frequency modulation response time of the energy storage converter is often captured by an oscilloscope, but the intermediate process of calculating the frequency modulation response time using the results of the oscilloscope is very complicated and the calculation time is long. Summary of the invention

[0004] Based on this, it is necessary to provide a frequency modulation response test method, device, system and storage medium for energy storage systems that can improve the simplicity of frequency modulation response time testing of energy storage converters and simplify test results in response to the above technical problems.

[0005] In a first aspect, the present application provides a method for testing the frequency modulation response of an energy storage system, wherein the energy storage system comprises an energy storage converter and a three-phase electric meter, wherein the energy storage converter is communicatively connected to a power grid, and the three-phase electric meter is connected between the power grid and the energy storage converter; the three-phase electric meter and the energy storage converter are arranged at different communication addresses of the same bus, and the method comprises:

[0006] Respectively obtain the communication parameters of the energy storage converter and the three-phase meter to perform parameter configuration, and simulate the communication between the energy storage converter and the three-phase meter;

[0007] Constructing a first window, and using the first window to read the active power data of the three-phase electric meter in real time;

[0008] Constructing a second window, writing the charge and discharge commands of the energy storage converter into the second window, simulating the charge and discharge process of the energy storage converter; the active power data in the first window changes with the charge and discharge process;

[0009] Extract the simulation test messages of the first window and the second window, and obtain the frequency modulation response time of the energy storage converter according to the simulation test messages.

[0010] In one embodiment, the charge and discharge command includes a preset power parameter value, and writing the charge and discharge command of the energy storage converter in the second window to simulate the charge and discharge process of the energy storage converter includes:

[0011] The first shutdown command, the full-power discharge command, the second shutdown command, the full-power charging command and the third shutdown command are written in sequence in the second window to simulate the charging and discharging process of the energy storage inverter; wherein the power parameter value of the full-power discharge command and the power parameter value of the full-power charging command are opposite to each other, and the power parameter values ​​of the first shutdown command, the second shutdown command and the third shutdown command are equal in size.

[0012] In one embodiment, the simulation test message displays the simulated communication process between the energy storage converter and the three-phase electric meter in the time sequence of the active power data and the charge and discharge command, and obtaining the frequency modulation response time of the energy storage converter according to the simulation test message includes:

[0013] Extracting from the simulation test message a first target time at which the full-power discharge command is written into the second window, and a second target time at which the active power data of the three-phase electric meter changes accordingly based on the full-power discharge command;

[0014] A discharge frequency modulation response time of the energy storage converter is determined according to the first target time and the second target time.

[0015] In one embodiment, obtaining the frequency modulation response time of the energy storage converter according to the simulation test message further includes:

[0016] Extracting from the simulation test message a third target time at which the full-power charging command is written into the second window, and a fourth target time at which the active power data of the three-phase electric meter changes accordingly based on the full-power charging command;

[0017] The charging frequency modulation response time of the energy storage converter is determined according to the third target time and the fourth target time.

[0018] In one embodiment, the method further comprises:

[0019] The discharge frequency modulation response time and the charge frequency modulation response time are respectively compared with the preset frequency modulation time to obtain the frequency modulation response test result of the energy storage converter.

[0020] In one of the embodiments, the active power data of the three-phase electricity meter includes the total active power value of the three-phase electricity meter and the active power values ​​of each of the three phases.

[0021] In one embodiment, the communication parameters include a baud rate, a check bit, a stop bit, and a communication address, and the steps of respectively acquiring the communication parameters of the energy storage converter and the three-phase meter for parameter configuration include:

[0022] The baud rate, check bit, and stop bit of the energy storage converter and the three-phase electric meter are set to be consistent, and the communication addresses are set to be different.

[0023] In a second aspect, the present application further provides a frequency modulation response test device for an energy storage system, the device comprising:

[0024] A parameter configuration module, used to respectively obtain communication parameters of the energy storage converter and the three-phase meter to perform parameter configuration, and simulate the communication between the energy storage converter and the three-phase meter;

[0025] An electric meter data reading module, used to construct a first window, and use the first window to read the active power data of the three-phase electric meter in real time;

[0026] A converter command writing module is used to construct a second window, write the charge and discharge commands of the energy storage converter into the second window, and simulate the charge and discharge process of the energy storage converter; the active power data in the first window changes with the charge and discharge process;

[0027] A response time extraction module is used to extract the simulation test messages of the first window and the second window, and obtain the frequency modulation response time of the energy storage converter according to the simulation test messages.

[0028] In a third aspect, the present application further provides an energy storage system, including a power grid, an energy storage converter, a three-phase electric meter, and a host computer, wherein the energy storage converter is communicatively connected to the power grid, and the three-phase electric meter is connected between the power grid and the energy storage converter; the three-phase electric meter and the energy storage converter are arranged on different communication addresses of the same bus,

[0029] The host computer is used to implement the steps of the method described in the first aspect above;

[0030] The energy storage converter is used to interact with the power grid according to the charge and discharge commands sent by the host computer;

[0031] The three-phase electric meter is used to monitor the charging and discharging process of the energy storage converter in real time.

[0032] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps corresponding to the method described in the first aspect above are implemented.

[0033] The frequency modulation response test method, device, system and storage medium of the energy storage system are as follows: by configuring parameters on a host computer using the communication parameters of the energy storage inverter and the three-phase meter, the communication between the energy storage inverter and the three-phase meter is simulated; a first window is constructed, and the active power data of the three-phase meter is read in real time using the first window; a second window is constructed, and the charge and discharge commands of the energy storage inverter are written into the second window to simulate the charge and discharge process of the energy storage inverter; the active power data in the first window changes with the charge and discharge process; the simulation test messages of the first window and the second window are extracted, and the frequency modulation response time of the energy storage inverter is obtained according to the simulation test messages, thereby realizing remote debugging and visualization of the frequency modulation response time of the energy storage inverter, and improving the convenience and accuracy of extracting the frequency modulation response time of the energy storage inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 is an application environment diagram of an energy storage system in one embodiment;

[0036] Figure 2 A schematic diagram of a flow chart of a frequency modulation response test method of an energy storage system in one embodiment;

[0037] Figure 3 Schematic diagram of a flow chart of obtaining the discharge frequency modulation response time in step 204 in one embodiment;

[0038] Figure 4 It is a schematic diagram of a process of obtaining the charging frequency modulation response time in step 204 in one embodiment;

[0039] Figure 5 1 is a structural block diagram of a frequency modulation response testing device for an energy storage system in an embodiment. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the" and the like involved in this application do not indicate a quantitative limitation, and may represent the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships, for example, "A and / or B" can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0042] The frequency modulation response test method of the energy storage system provided in the embodiment of the present application can be applied to Figure 1 In the energy storage system shown. The energy storage system includes a power grid 10, an energy storage converter 20, a three-phase electric meter 30 and a host computer 40, the energy storage converter 20 is communicatively connected to the power grid 10, the three-phase electric meter 30 is connected between the power grid 10 and the energy storage converter 20; the three-phase electric meter 30 and the energy storage converter 20 are arranged at different communication addresses of the same bus.

[0043] The host computer 40 is used to obtain the communication parameters of the energy storage inverter 20 and the three-phase meter 30 respectively for parameter configuration, and simulate the communication between the energy storage inverter 20 and the three-phase meter 30. Construct a first window, and use the first window to read the active power data of the three-phase meter 30 in real time; construct a second window, write the charge and discharge commands of the energy storage inverter 20 in the second window, and simulate the charge and discharge process of the energy storage inverter; the active power data in the first window changes with the charge and discharge process. Extract the simulation test messages of the first window and the second window, and obtain the frequency modulation response time of the energy storage inverter according to the simulation test messages.

[0044] The energy storage converter 20 is used to add additional active power or reduce active power for the power grid 10 according to the charge and discharge commands sent by the host computer 40.

[0045] The three-phase electric meter 30 is used to monitor the charging and discharging process of the energy storage converter 20 in real time.

[0046] In an exemplary embodiment, Figure 2 As shown, a frequency modulation response test method for an energy storage system is provided. Figure 1 The upper computer end in is used as an example to illustrate, including the following steps 201 to 204.

[0047] Step 201 , respectively obtain communication parameters of the energy storage converter and the three-phase meter to perform parameter configuration, and simulate communication between the energy storage converter and the three-phase meter.

[0048] The communication parameters include baud rate, check bit, stop bit, communication address, etc. The communication parameters of the energy storage converter and the three-phase meter are obtained respectively, and the baud rate, check bit, and stop bit of the energy storage converter and the three-phase meter are set to be consistent, and the communication address is set differently to simulate the communication between the energy storage converter and the three-phase meter.

[0049] Step 202: construct a first window, and use the first window to read the active power data of the three-phase electric meter in real time.

[0050] The active power data includes the total active power value of the three-phase meter and the active power values ​​of the three phases respectively.

[0051] Step 203, constructing a second window, writing the charge and discharge commands of the energy storage converter into the second window, and simulating the charge and discharge process of the energy storage converter.

[0052] The active power data in the first window changes with the charging and discharging process. The charging and discharging command includes a preset power parameter value.

[0053] Specifically, the power parameter value of the charge and discharge command is determined according to the communication protocol of the energy storage converter, the charge and discharge command is written in the second window, the charge and discharge process of the energy storage converter is simulated, and the active power data that changes with the charge and discharge command is obtained in the first window.

[0054] Step 204: extract the simulation test messages of the first window and the second window, and obtain the frequency modulation response time of the energy storage converter according to the simulation test messages.

[0055] The simulation test message displays the simulation communication process between the energy storage inverter and the three-phase electric meter in the time sequence of the active power data and the charge and discharge commands.

[0056] Specifically, the message data in the first window and the second window record all the data of the charging and discharging process. By extracting the simulation test messages in the first window and the second window during the charging and discharging process, the frequency modulation response time of the energy storage inverter from writing full-power discharge to reading full-power discharge, and from writing full-power charging to reading full-power charging is determined, thereby realizing remote debugging and visualization of the frequency modulation response time of the energy storage inverter.

[0057] In the frequency modulation response test method of the energy storage system, the communication parameters of the energy storage inverter and the three-phase meter are used to configure parameters on the host computer to simulate the communication between the energy storage inverter and the three-phase meter; a first window is constructed, and the active power data of the three-phase meter is read in real time using the first window; a second window is constructed, and the charge and discharge commands of the energy storage inverter are written in the second window to simulate the charge and discharge process of the energy storage inverter; the active power data in the first window changes with the charge and discharge process; the simulation test messages of the first window and the second window are extracted, and the frequency modulation response time of the energy storage inverter is obtained according to the simulation test message, thereby realizing remote debugging and visualization of the frequency modulation response time of the energy storage inverter, and improving the convenience and accuracy of extracting the frequency modulation response time of the energy storage inverter.

[0058] In an exemplary embodiment, in step 203, the charge and discharge commands of the energy storage converter are written into the second window to simulate the charge and discharge process of the energy storage converter, which specifically includes the following contents:

[0059] The first shutdown command, the full power discharge command, the second shutdown command, the full power charge command and the third shutdown command are sequentially written into the second window to simulate the charging and discharging process of the energy storage converter. The power parameter value of the full power discharge command and the power parameter value of the full power charge command are opposite to each other, and the power parameter values ​​of the first shutdown command, the second shutdown command and the third shutdown command are equal.

[0060] Exemplarily, according to the communication protocol of the energy storage converter, the power parameter values ​​of the full power discharge command and the full power charge command written in the second window during the simulation process are ten times the actual process. Assuming that the actual power of the energy storage converter is 100kw, the power parameter value of the full power discharge command is set to 1000, and the power parameter value of the full power charge command is set to -1000. At the same time, the power parameter values ​​of the first shutdown command, the second shutdown command, and the third shutdown command are set to 0.

[0061] In the second window, write the first shutdown command and the full-power discharge command in sequence to simulate the discharge process of the energy storage inverter, then write the second shutdown command and the full-power charge command to simulate the charging process of the energy storage inverter, and finally write the third shutdown command to shut down the energy storage inverter.

[0062] In this embodiment, by writing the above-mentioned charge and discharge commands in sequence, the complete charge and discharge process of the energy storage converter is simulated, thereby improving the accuracy of the obtained frequency modulation response time of the energy storage converter.

[0063] In an exemplary embodiment, Figure 3 As shown, in step 204, the frequency modulation response time of the energy storage converter is obtained according to the simulation test message, which specifically includes the following steps 301 to 302.

[0064] Step 301, extracting from the simulation test message the first target time at which the full-power discharge command is written into the second window, and the second target time at which the active power data of the three-phase meter changes accordingly based on the full-power discharge command.

[0065] Step 302: Determine the discharge frequency modulation response time of the energy storage converter according to the first target time and the second target time.

[0066] Specifically, a three-phase electric meter is connected between the power grid and the energy storage inverter. Therefore, when the energy storage inverter writes a full-power discharge command, the output active power value will be detected by the three-phase electric meter. The first target time when the full-power discharge command is written into the second window and the second target time when the active power data of the three-phase electric meter changes accordingly are extracted using the acquired simulation test message, and the discharge frequency modulation response time of the energy storage inverter is calculated, thereby realizing the visual measurement of the discharge frequency modulation response time.

[0067] In an exemplary embodiment, Figure 4 As shown, in step 204, the frequency modulation response time of the energy storage converter is obtained according to the simulation test message, and specifically also includes the following steps 401 to 402.

[0068] Step 401, extracting from the simulation test message the third target time at which the full-power charging command is written into the second window, and the fourth target time at which the active power data of the three-phase meter changes correspondingly based on the full-power charging command.

[0069] Step 402: Determine the charging frequency modulation response time of the energy storage converter according to the third target time and the fourth target time.

[0070] Specifically, the third target time when the full-power charging command is written into the second window and the fourth target time when the active power data detected by the three-phase meter changes accordingly are extracted from the acquired simulation test message, and the charging frequency modulation response time of the energy storage inverter is calculated, thereby realizing the visual measurement of the charging frequency modulation response time.

[0071] More specifically, the method further includes the following: comparing the discharge frequency modulation response time and the charge frequency modulation response time with a preset frequency modulation time respectively, and obtaining a frequency modulation response test result of the energy storage converter.

[0072] Specifically, the discharge frequency modulation response time and the charging frequency modulation response time obtained during the simulated communication between the three-phase electric meter and the energy storage converter are compared with the preset frequency modulation response time of the energy storage converter. If both of them and the preset frequency modulation response time are less than the preset frequency modulation response time, it means that the frequency modulation response time of the energy storage converter during operation has passed the test, otherwise, the frequency modulation response time test of the energy storage converter during operation has failed, and manual detection equipment is required.

[0073] In this embodiment, by comparing the discharge frequency modulation response time, the charge frequency modulation response time and the preset frequency modulation time, the frequency modulation response test result of the energy storage inverter is obtained, so that the simulation test process can be calibrated in time and the reliability of the test result is improved.

[0074] In a detailed exemplary embodiment, a frequency modulation response test method for an energy storage system is proposed and applied to Figure 1 The energy storage system shown includes the following:

[0075] Step 1: Obtain the communication parameters of the energy storage inverter and the three-phase meter, set the baud rate, check bit, and stop bit of the energy storage inverter and the three-phase meter to be consistent, set the communication address differently, and simulate the communication between the energy storage inverter and the three-phase meter.

[0076] Step 2: Construct the first window and the second window.

[0077] Step 3: Write the first shutdown command, full power discharge command, second shutdown command, full power charge command and third shutdown command in the second window to simulate the charging and discharging process of the energy storage converter. And monitor the active power data that changes with the charging and discharging commands in real time in the first window.

[0078] Step 4: Acquire simulation test messages of the first window and the second window during the charging and discharging process.

[0079] Step 5: From the simulation test message, extract the first target time when the full-power discharge command is written into the second window and the second target time when the active power data of the three-phase meter changes accordingly, and calculate the discharge frequency modulation response time of the energy storage inverter; extract the third target time when the full-power charging command is written into the second window and the fourth target time when the active power data detected by the three-phase meter changes accordingly, and calculate the charging frequency modulation response time of the energy storage inverter.

[0080] For example, part of the content of the simulation test message is as follows:

[0081] Tx:697-14:23:30.425-01 06 00 67 00 00 38 15

[0082] Rx:698-14:23:30.487-01 06 00 67 00 00 38 15

[0083] Tx:699-14:23:30.525-0B 03 08D8 00 08C6 FD

[0084] Rx:700-14:23:30.587-0B 03 10 44 7A E1 A2 43C5 05 4B 43B0 8C 62 438031 99B8 39

[0085] Tx:701-14:23:30.625-01 06 00 67 03E8 38AB

[0086] Rx:702-14:23:30.688-01 06 00 67 03E8 38AB

[0087] Tx:703-14:23:30.726-0B 03 08D8 00 08C6 FD

[0088] Rx:704-14:23:30.788-0B 03 10 44 63C6 36 43EB 31 0E 43 98 71BD 43 07D33E C8 5F

[0089] Tx:733-14:23:32.231-01 06 00 67 03E8 38AB

[0090] Rx:734-14:23:32.293-01 06 00 67 03E8 38AB

[0091] Tx:735-14:23:32.331-0B 03 08D8 00 08C6 FD

[0092] Rx:736-14:23:32.394-0B 03 10C7 C1 32 15C7 00DA 6F C7 01 04 12C70085AA 6D 4E。

[0093] Among them, Tx indicates the writing of the message, and Rx indicates the reading of the message. 14:23:30.425 indicates the time when the second window writes the zero power command. The content of the Tx:701 segment indicates that the full power discharge command is written into the second window at 14:23:30.625. Correspondingly, the content of the Rx:736 segment indicates that the first window reads the active power data of the energy storage converter that changes based on the full power discharge command at 14:23:32.394.

[0094] Step 6: Compare the discharge frequency modulation response time, the charge frequency modulation response time and the preset frequency modulation time respectively to obtain the frequency modulation response test result of the energy storage converter.

[0095] In this detailed embodiment, the upper computer simulates the communication between the three-phase electric meter and the energy storage converter, thereby realizing a visualized test of the frequency modulation response time of the energy storage converter, and improving the reliability and convenience of the frequency modulation response time calculation.

[0096] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0097] Based on the same inventive concept, the embodiment of the present application also provides a frequency modulation response test device for an energy storage system for implementing the frequency modulation response test method of the energy storage system involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of the frequency modulation response test device for one or more energy storage systems provided below can refer to the limitations of the frequency modulation response test method for the energy storage system above, and will not be repeated here.

[0098] In an exemplary embodiment, Figure 5 As shown, a frequency modulation response test device for an energy storage system is provided, comprising: a parameter configuration module 501, an electric meter data reading module 502, a converter command writing module 503 and a response time extraction module 504, wherein:

[0099] The parameter configuration module 501 is used to respectively obtain the communication parameters of the energy storage converter and the three-phase meter to perform parameter configuration, and simulate the communication between the energy storage converter and the three-phase meter.

[0100] The electric meter data reading module 502 is used to construct a first window and use the first window to read the active power data of the three-phase electric meter in real time.

[0101] The converter command writing module 503 is used to construct a second window, write the charge and discharge commands of the energy storage converter in the second window, and simulate the charge and discharge process of the energy storage converter; the active power data in the first window changes with the charge and discharge process.

[0102] The response time extraction module 504 is used to extract the simulation test messages of the first window and the second window, and obtain the frequency modulation response time of the energy storage converter according to the simulation test messages.

[0103] In one embodiment, the converter command writing module 503 is further used for:

[0104] The first shutdown command, the full-power discharge command, the second shutdown command, the full-power charging command and the third shutdown command are written in sequence in the second window to simulate the charging and discharging process of the energy storage inverter; wherein the power parameter value of the full-power discharge command and the power parameter value of the full-power charging command are opposite to each other, and the power parameter values ​​of the first shutdown command, the second shutdown command and the third shutdown command are equal in size.

[0105] In one embodiment, the response time extraction module 504 is also used to: extract from the simulation test message a first target time at which the full-power discharge command is written into the second window, and a second target time at which the active power data of the three-phase meter changes accordingly based on the full-power discharge command; and determine the discharge frequency modulation response time of the energy storage inverter based on the first target time and the second target time.

[0106] In one embodiment, the response time extraction module 504 is also used to: extract from the simulation test message a third target time at which the full-power charging command is written into the second window, and a fourth target time at which the active power data of the three-phase meter changes correspondingly based on the full-power charging command; and determine the charging frequency modulation response time of the energy storage inverter based on the third target time and the fourth target time.

[0107] In one embodiment, the response time extraction module 504 is further used to: respectively compare the discharge frequency modulation response time and the charge frequency modulation response time with the preset frequency modulation time to obtain the frequency modulation response test result of the energy storage inverter.

[0108] In one embodiment, the parameter configuration module 501 is further used to: set the baud rate, check bit, and stop bit of the energy storage converter and the three-phase electric meter to be consistent, and set the communication addresses to be different.

[0109] Each module in the frequency modulation response test device of the energy storage system can be implemented in whole or in part by software, hardware and a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each module.

[0110] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0111] Respectively obtain the communication parameters of the energy storage converter and the three-phase meter to perform parameter configuration, and simulate the communication between the energy storage converter and the three-phase meter;

[0112] Constructing a first window, and using the first window to read the active power data of the three-phase electric meter in real time;

[0113] Constructing a second window, writing the charge and discharge commands of the energy storage converter into the second window, simulating the charge and discharge process of the energy storage converter; the active power data in the first window changes with the charge and discharge process;

[0114] Extract the simulation test messages of the first window and the second window, and obtain the frequency modulation response time of the energy storage converter according to the simulation test messages.

[0115] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: a first shutdown command, a full-power discharge command, a second shutdown command, a full-power charging command and a third shutdown command are written in sequence in the second window to simulate the charging and discharging process of the energy storage inverter; wherein the power parameter value of the full-power discharge command and the power parameter value of the full-power charging command are opposite to each other, and the power parameter values ​​of the first shutdown command, the second shutdown command and the third shutdown command are equal in size.

[0116] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: extracting from the simulation test message the first target time at which the full-power discharge command is written into the second window, and the second target time at which the active power data of the three-phase meter changes accordingly based on the full-power discharge command; and determining the discharge frequency modulation response time of the energy storage inverter based on the first target time and the second target time.

[0117] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: extracting from the simulation test message the third target time at which the full-power charging command is written into the second window, and the fourth target time at which the active power data of the three-phase meter changes correspondingly based on the full-power charging command; and determining the charging frequency modulation response time of the energy storage inverter based on the third target time and the fourth target time.

[0118] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: comparing the discharge frequency modulation response time and the charge frequency modulation response time with the preset frequency modulation time respectively, and obtaining the frequency modulation response test result of the energy storage inverter.

[0119] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: the baud rate, check bit, and stop bit of the energy storage converter and the three-phase electric meter are set to be consistent, and the communication addresses are set to be different.

[0120] In one embodiment, a computer program product is provided, including a computer program, which implements the steps corresponding to the methods described in the above embodiments when executed by a processor.

[0121] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0122] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0123] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A frequency modulation response test method for an energy storage system, characterized in that: The energy storage system includes an energy storage converter and a three-phase electric meter, wherein the energy storage converter is connected to a power grid for communication, and the three-phase electric meter is connected between the power grid and the energy storage converter; the three-phase electric meter and the energy storage converter are arranged at different communication addresses of the same bus, and the method includes: Respectively obtain the communication parameters of the energy storage converter and the three-phase meter to perform parameter configuration, and simulate the communication between the energy storage converter and the three-phase meter; Constructing a first window, and using the first window to read the active power data of the three-phase electric meter in real time; Constructing a second window, writing the charge and discharge commands of the energy storage converter into the second window, simulating the charge and discharge process of the energy storage converter; the active power data in the first window changes with the charge and discharge process; Extract the simulation test messages of the first window and the second window, and obtain the frequency modulation response time of the energy storage converter according to the simulation test messages.

2. The frequency modulation response test method of the energy storage system according to claim 1, characterized in that: The charge and discharge command includes a preset power parameter value, and the charge and discharge command of the energy storage converter is written in the second window. The simulation of the charge and discharge process of the energy storage converter includes: The first shutdown command, the full-power discharge command, the second shutdown command, the full-power charging command and the third shutdown command are written in sequence in the second window to simulate the charging and discharging process of the energy storage inverter; wherein the power parameter value of the full-power discharge command and the power parameter value of the full-power charging command are opposite to each other, and the power parameter values ​​of the first shutdown command, the second shutdown command and the third shutdown command are equal in size.

3. The frequency modulation response test method of the energy storage system according to claim 2, characterized in that: The simulation test message displays the simulated communication process between the energy storage converter and the three-phase electric meter according to the time sequence of the active power data and the charge and discharge commands. The obtaining of the frequency modulation response time of the energy storage converter according to the simulation test message includes: Extracting from the simulation test message a first target time at which the full-power discharge command is written into the second window, and a second target time at which the active power data of the three-phase electric meter changes accordingly based on the full-power discharge command; A discharge frequency modulation response time of the energy storage converter is determined according to the first target time and the second target time.

4. The frequency modulation response test method of the energy storage system according to claim 3, characterized in that: The obtaining the frequency modulation response time of the energy storage converter according to the simulation test message further includes: Extracting from the simulation test message a third target time at which the full-power charging command is written into the second window, and a fourth target time at which the active power data of the three-phase electric meter changes accordingly based on the full-power charging command; The charging frequency modulation response time of the energy storage converter is determined according to the third target time and the fourth target time.

5. The frequency modulation response test method of the energy storage system according to claim 4, characterized in that: The method further comprises: The discharge frequency modulation response time and the charge frequency modulation response time are respectively compared with the preset frequency modulation time to obtain the frequency modulation response test result of the energy storage converter.

6. The frequency modulation response test method of the energy storage system according to claim 1, characterized in that: The active power data of the three-phase electricity meter includes the total active power value of the three-phase electricity meter and the active power values ​​of each of the three phases.

7. The frequency modulation response test method of the energy storage system according to claim 1, characterized in that: The communication parameters include baud rate, check bit, stop bit and communication address, and the steps of respectively acquiring the communication parameters of the energy storage converter and the three-phase electric meter for parameter configuration include: The baud rate, check bit, and stop bit of the energy storage converter and the three-phase electric meter are set to be consistent, and the communication addresses are set to be different.

8. A frequency modulation response test device for an energy storage system, characterized in that: The device comprises: A parameter configuration module, used to respectively obtain communication parameters of the energy storage converter and the three-phase meter to perform parameter configuration, and simulate the communication between the energy storage converter and the three-phase meter; An electric meter data reading module, used to construct a first window, and use the first window to read the active power data of the three-phase electric meter in real time; A converter command writing module is used to construct a second window, write the charge and discharge commands of the energy storage converter into the second window, and simulate the charge and discharge process of the energy storage converter; the active power data in the first window changes with the charge and discharge process; A response time extraction module is used to extract the simulation test messages of the first window and the second window, and obtain the frequency modulation response time of the energy storage converter according to the simulation test messages.

9. An energy storage system, characterized in that: It includes a power grid, an energy storage converter, a three-phase electric meter and a host computer. The energy storage converter is connected to the power grid for communication, and the three-phase electric meter is connected between the power grid and the energy storage converter. The three-phase electric meter and the energy storage converter are set at different communication addresses of the same bus. The host computer is used to implement the steps of any one of claims 1 to 7; The energy storage converter is used to interact with the power grid according to the charge and discharge commands sent by the host computer; The three-phase electric meter is used to monitor the charging and discharging process of the energy storage converter in real time.

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

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