Energy storage system performance testing method and device

Abstract

The present application discloses a method and device for testing the performance of an energy storage system, the method comprising: collecting a first electrical operating signal of the energy storage system, performing signal processing on the first electrical operating signal to obtain a processed second electrical operating signal, and transmitting the second electrical operating signal to a synchronization unit; sending a control instruction to the synchronization unit in a specified manner so that the synchronization unit performs synchronous processing on the control instruction and the second electrical operating signal; the control instruction is a control instruction sent by a controller to perform different performance tests on the energy storage system; generating a power sequence based on the second electrical operating signal after synchronous processing, and recording the control instruction and power sequence after synchronous processing; determining an index value in the power sequence based on the data obtained after the recording, so as to perform a performance test on the energy storage system according to the index value; the index value includes the position of the power value where a sudden change occurs in the power sequence.

Description

Technical Field

[0001] The present application relates to the field of energy storage system testing, and specifically to a method and device for testing the performance of an energy storage system. Background Art

[0002] With the expansion of renewable energy power generation and grid connection, energy storage systems, as a necessary energy buffer link in distributed power generation systems, can provide both active and reactive power support, enhance the distribution network's ability to accept distributed power sources, stabilize the voltage level of the grid's terminal nodes, and enhance the controllability of the distribution network.

[0003] To ensure the normal operation of power generation systems, real-time monitoring of various energy storage system operating indicators has become an indispensable part of energy storage system operation. However, current energy storage system testing can only test a portion of the energy storage station structure, which cannot meet the overall performance requirements of the energy storage station grid-connected system and cannot ensure the reliable operation of the energy storage system after grid connection. Summary of the Invention

[0004] In order to solve the above problems, the present application proposes a method for testing the performance of an energy storage system, comprising: collecting a first electrical operation signal of the energy storage system, performing signal processing on the first electrical operation signal to obtain a processed second electrical operation signal, and transmitting the second electrical operation signal to a synchronization unit;

[0005] Sending a control instruction to the synchronization unit in a specified manner, so that the synchronization unit synchronously processes the control instruction and the second electrical operation signal; the control instruction is a control instruction sent by the controller to perform different performance tests on the energy storage system;

[0006] generating a power sequence according to the second electrical operation signal after synchronization processing, and recording the control instruction and the power sequence after synchronization processing;

[0007] According to the data obtained after recording, the index value in the power sequence is determined to perform a performance test on the energy storage system according to the index value; the index value includes the position of the power value where the mutation occurs in the power sequence.

[0008] In one implementation of the present application, sending the control instruction to the synchronization unit in a specified manner so that the synchronization unit synchronizes the control instruction and the second electrical operation signal specifically includes:

[0009] converting the control instruction, calculating the frequency of the second electrical operation signal, and performing digital-to-analog conversion on the converted control instruction and the frequency;

[0010] The converted control instruction and the frequency are synchronously collected through a multi-channel collection unit.

[0011] In one implementation of the present application, determining an index value in the power sequence based on the data obtained after recording, so as to perform a performance test on the energy storage system based on the index value, specifically includes:

[0012] Traversing the power sequence, and sequentially determining a first difference between a power value included in the power sequence and a previous power value of the power value;

[0013] When the first difference is not zero, determining a sequence number of the power value in the power sequence as a first index value;

[0014] Starting from the first index value, traversing the power sequence backward to determine whether the power sequence is in a stable state;

[0015] When the power sequence is in a stable state, a second index value is determined to perform a performance test on the energy storage system according to the first index value and the second index value.

[0016] In one implementation of the present application, determining whether the power sequence is in a stable state specifically includes:

[0017] Traversing the power sequence backward, determining a maximum power value among the power values included in the power sequence, and whether there is a target power value less than the maximum power value after the maximum power value;

[0018] If so, determining that the power sequence enters an overshoot state at the location of the target power value;

[0019] When the power sequence enters an overshoot state, taking the position of the target power value as a starting point, sequentially calculating a second difference between a power value included in the power sequence and a power value next to the power value;

[0020] When the second difference is zero, it is determined that the power sequence is in a stable state.

[0021] In one implementation of the present application, determining the second index value specifically includes:

[0022] When the second difference is zero, the serial number corresponding to the first power value of the two power values obtained by subtracting the second difference is determined as the second index value.

[0023] In one implementation of the present application, performing a performance test on the energy storage system according to the first index value and the second index value specifically includes:

[0024] Taking the second index value as a starting point, determining a sliding average value between a plurality of power values included in each of the sequence intervals in the power sequence according to a preset sequence interval, and using the sliding average value as a steady-state power value;

[0025] Calculating the rated power of the energy storage system according to the steady-state power value, and determining a third index value according to the time the energy storage system operates at the rated power;

[0026] Determining that the energy storage system maintains a charge and discharge power within a preset range of the rated power, and determining a fourth index value based on a time for which the energy storage system operates at the charge and discharge power;

[0027] Determine a test parameter of the energy storage system according to the third index value and the fourth index value.

[0028] In one implementation of the present application, generating a power sequence according to the second electrical operation signal after synchronization processing specifically includes:

[0029] determining, according to the frequency of the second electrical operation signal, a plurality of sampling points corresponding to the second electrical operation signal; the second electrical operation signal carries electrical operation parameters of the energy storage system during operation, the electrical operation parameters including voltage and current;

[0030] A plurality of power values corresponding to the plurality of sampling points are determined according to the voltages and currents respectively corresponding to the plurality of sampling points, so as to generate a power sequence including the plurality of power values.

[0031] In one implementation of the present application, the designated method includes pulse, transmission and communication.

[0032] In one implementation of the present application, determining the test parameters of the energy storage system according to the third index value and the fourth index value specifically includes:

[0033] Determine the charge and discharge response time of the energy storage system:

[0034] RT=(d q -d0)*0.1

[0035] Determine the charge and discharge adjustment time of the energy storage system:

[0036] AT=(d a -d0)*0.1

[0037] Determine the charge and discharge conversion time of the energy storage system:

[0038] ZT=(d1-d0)*0.1

[0039] Among them, RT is the charge and discharge time, AT is the charge and discharge adjustment time, ZT is the charge and discharge conversion time, d0 is the first index value, d1 is the second index value, d q is the third index value, d a The fourth index value.

[0040] The present invention provides a device for testing the performance of an energy storage system, the device comprising:

[0041] a signal processing unit, configured to collect a first electrical operation signal of the energy storage system, perform signal processing on the first electrical operation signal to obtain a processed second electrical operation signal, and transmit the second electrical operation signal to the synchronization unit;

[0042] a synchronization unit, configured to synchronously process a control instruction and the second electrical operation signal; the control instruction is a control instruction sent by a controller to perform different performance tests on the energy storage system;

[0043] A data processing unit is used to generate a power sequence based on the second electrical operation signal after synchronous processing, and to record the control instruction and the power sequence after synchronous processing; it is also used to determine the index value existing in the power sequence based on the data obtained after recording, so as to perform a performance test on the energy storage system according to the index value; the index value indicates the position of the power value where the mutation occurs in the power sequence.

[0044] The energy storage system performance testing method proposed in this application can bring the following beneficial effects:

[0045] During the operation of the energy storage system, the corresponding first electrical operation signal is collected in real time, and the first electrical operation signal is analyzed and processed to perform performance testing on the energy storage system. The first electrical operation signal can reflect the overall performance of the energy storage system during operation. By processing the collected electrical operation signal, the disadvantages of traditional single-device testing are overcome, making it easier for staff to understand the status of the energy storage test system and ensure the normal operation of the energy storage system after grid connection. After receiving the control instruction, the first electrical operation signal and the control instruction after signal processing are synchronized by the synchronization unit, realizing the synchronization of instructions, data and frequency, ensuring the real-time and reliability of measurement indicators, and effectively preventing the randomness of data processing. By determining the index value to perform performance testing on the energy storage system, a more accurate dynamic response time of the energy storage system can be obtained, making it possible to process a large amount of operation data of the energy storage system during the grid connection process, and improving the accuracy of the calculation results. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0047] Figure 1 A schematic diagram of the structure of an energy storage system performance testing device provided in an embodiment of the present application;

[0048] Figure 2 A functional schematic diagram of an energy storage system performance testing device provided in an embodiment of the present application;

[0049] Figure 3 A flow chart of a method for testing the performance of an energy storage system provided in an embodiment of the present application;

[0050] Figure 4 A flowchart of another energy storage system performance testing method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] The following describes in detail the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0053] Figure 1 A schematic diagram of the structure of an energy storage system performance test device provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the device includes:

[0054] The signal processing unit 101 is configured to collect a first electrical operation signal of the energy storage system, perform signal processing on the first electrical operation signal to obtain a processed second electrical operation signal, and transmit the second electrical operation signal to the synchronization unit;

[0055] The synchronization unit 102 is used to synchronize the control instruction and the second electrical operation signal; the control instruction is a control instruction sent by the controller to perform different performance tests on the energy storage system;

[0056] The data processing unit 103 is configured to generate a power sequence according to the second electrical operation signal after synchronization processing, and record the control instruction and the power sequence after synchronization processing;

[0057] It is also used to determine the index value in the power sequence based on the data obtained after recording, so as to perform performance testing on the energy storage system according to the index value; the index value indicates the position of the power value where the mutation occurs in the power sequence.

[0058] like Figure 2 The functional diagram of energy storage system performance testing equipment shown in FIG. Signal processing unit 101 collects a first electrical operating signal from the energy storage system in real time. The first electrical operating signal includes a DC current signal and a DC voltage signal. After collecting the first electrical operating signal, the collected DC voltage signal and DC voltage signal are first isolated, transformed, and signal conditioned. Zero-crossing detection is then performed on the second electrical operating signal obtained after the aforementioned processing to detect the frequency of the second electrical operating signal. Finally, the second electrical operating signal is transmitted to synchronization unit 102. Synchronization unit 102 includes a receiving unit, an ARM processor, a D / A digital-to-analog converter, and a multi-channel synchronous acquisition unit. The receiving unit is capable of synchronously receiving control instructions from a controller to perform performance testing on the energy storage system and transmitting the control instructions to the ARM processor for conversion. The ARM processor also calculates the frequency of the received second electrical operating signal and transmits the converted control instructions and frequency to the D / A digital-to-analog converter. After completing the digital-to-analog conversion, the multi-channel synchronous acquisition unit 1 can synchronously acquire control instructions, signal frequency, and the second electrical operating signal, thereby achieving synchronization between frequency, instructions, and data, meeting the synchronization requirements of energy storage system testing projects. The data processing unit 104, connected to the multi-channel synchronous acquisition unit, includes a programmable FPGA, an interface chip, and an embedded x86 system. It is used to test the performance of the energy storage system based on the synchronized second electrical operating signal.

[0059] The above is an energy storage system performance test device provided in the embodiment of the present application. Based on the same idea, one or more embodiments of this specification also provide methods and media corresponding to the above device, such as Figure 3 As shown, the method includes:

[0060] S101: Collect a first electrical operation signal of an energy storage system, perform signal processing on the first electrical operation signal to obtain a processed second electrical operation signal, and transmit the second electrical operation signal to a synchronization unit.

[0061] During the operation of the energy storage system, a first electrical operation signal of the energy storage system is collected in real time. The first electrical operation signal includes a DC current signal and a DC voltage signal. By obtaining the voltage and current data of the energy storage system, a specific performance test can be performed on it.

[0062] After acquiring the first electrical operating signal, it undergoes isolation, transformation, and signal conditioning to produce a processed second electrical operating signal. Because the data processing unit built into the test device is not a real-time processing system, both the synchronization signal and frequency measurement experience lags, which can affect the accuracy of test results. For energy storage system testing projects with high real-time requirements, especially dynamic response testing, ensuring the synchronization of data, command, and frequency signals is crucial. Therefore, after obtaining the second electrical operating signal, it must be transmitted to the synchronization unit to achieve signal synchronization for the second electrical operating signal.

[0063] S102: Sending a control instruction to a synchronization unit in a specified manner, so that the synchronization unit synchronously processes the control instruction and the second electrical operation signal; the control instruction is a control instruction sent by the controller to perform different performance tests on the energy storage system.

[0064] Testers can send corresponding control instructions through the controller, which includes an STM32. The control instructions vary depending on the test items, including power control test, overload capacity test, low voltage ride-through test, high voltage ride-through test, power quality test, dynamic response characteristic test, rated energy test, etc. By integrating different test functions into the same test device, the embodiment of the application can meet the overall performance test of the grid-connected energy storage power station system and ensure the reliable operation of the energy storage system after grid connection.

[0065] The synchronization unit within the test device is capable of synchronizing the data, frequency, and control instructions of the second electrical operating signal. The control instructions can be sent to the synchronization unit via a specified method, including pulse, transmission, and communication. Upon receiving the control instructions, the synchronization unit converts the control instructions, calculates the frequency of the second electrical operating signal, and performs digital-to-analog conversion on the converted control instructions and frequency. After completing this process, the multi-channel synchronous acquisition unit synchronously acquires the control instructions, the frequency signal of the second electrical operating signal, and the data signal, thereby achieving synchronized acquisition of data, frequency, and instructions, ensuring test accuracy.

[0066] S103: Generate a power sequence according to the second electrical operation signal after the synchronization processing, and record the control instruction and the power sequence after the synchronization processing.

[0067] The data signal corresponding to the second electrical operation signal carries the electrical operation parameters of the energy storage system during operation, and the electrical operation parameters include voltage data and current data. After completing the signal synchronization, the corresponding multiple sampling points are determined according to the frequency of the second electrical operation signal, and then the multiple power values corresponding to the multiple sampling points are determined according to the voltages and currents corresponding to the multiple sampling points, thereby generating a power sequence containing multiple power values. It can be understood that each voltage and current data corresponds to a power value, and the frequency can be set according to actual needs on the basis of ensuring the test accuracy and data volume, such as 10kHz. Correspondingly, the interval between each power value in the power sequence is 0.1ms. After generating the power sequence, the test device can record the power sequence and control instructions by recording the wave.

[0068] S104: Determine an index value in the power sequence based on the data obtained after recording, so as to perform a performance test on the energy storage system based on the index value; the index value includes the position of the power value where a sudden change occurs in the power sequence.

[0069] To improve the accuracy of performance testing, the present embodiment further analyzes the power sequence by determining an index value to determine the corresponding test parameters. It should be noted that to ensure signal synchronization, the acquisition frequency of the test device must be adapted to the frequency corresponding to the second electrical operating signal. For example, if the frequency is 10 kHz, the test device must acquire a trigger pulse every 0.1 ms.

[0070] In one embodiment, the test process of the performance test is described in detail by taking the dynamic response characteristic test as an example. Specifically, the power sequence is traversed, and the first difference ΔP1 between the power value contained in the power sequence and the previous power value of the power value is determined in sequence. If ΔP1 is not zero, it means that there is a power value that has undergone a mutation in the power sequence, and the trigger pulse has undergone a mutation. At this time, the sequence number of the power value in the power sequence needs to be determined, and the sequence number is used as the first index value d0. The sequence number indicates the position of the power value in the power sequence in which it is located. For example, if the frequency is 10kHz, the sequence number indicates the position of the power value in the 10k data.

[0071] After determining the first index value, the power sequence is continued to be traversed backwards with the first index value as the starting point to determine whether the power sequence is in a stable state. In the process of traversing the power sequence backwards, the maximum power value among the power values contained in the power sequence is determined, and in the power sequence, whether there is a target power value less than the maximum power value after the maximum power value. If so, it means that the power sequence enters an overshoot state at the position where the target power value is located. In the case that the power sequence enters an overshoot state, the second difference ΔP2 between the power value contained in the power sequence and the next power value of the power value is calculated in sequence with the position where the target power value is located as the starting point. If ΔP2 is 0, it means that the two power values corresponding to ΔP2 are equal, and at this time, the power sequence enters a stable state. Among them, the sequence number corresponding to the first power value of the two power values ​​obtained by the difference of ΔP2 is the second index value d1.

[0072] After determining the first index value d0 and the second index value d1, the energy storage system can be tested based on them. Specifically:

[0073] Taking the second index value as a starting point, according to a preset sequence interval, a sliding average value between a plurality of power values included in each sequence interval in the power sequence is determined, and the sliding average value is used as the power steady-state value.

[0074] It should be noted that when the power sequence is stable, when averaging the power values after (including) the second index value, to improve computational efficiency, a sliding average can be calculated between multiple power values at each sequence interval. If the sliding average fluctuates, it indicates that the pulse has changed, and the above process needs to be repeated to re-determine the index value.

[0075] After obtaining the steady-state power value, the rated power of the energy storage system is calculated, and the third index value d is determined according to the time the energy storage system operates at the rated power. q It should be noted that according to the national standard, 90% of the rated power can be calculated, and the third index value is the position of the last power value at which the power sequence can maintain rated power operation.

[0076] After determining the third index value, determine the charge and discharge power of the energy storage system to maintain within the preset range of the rated power, and determine the fourth index value d according to the time the energy storage system operates at the charge and discharge power. a It should be noted that the preset range can be set to ±2% according to the national standard. By determining the position of the last power value in the power sequence that can meet the above-mentioned charge and discharge power, the fourth index value d can be determined. a .

[0077] After determining the third index value d q and the fourth index value da Afterwards, according to the third index value d q and the fourth index value d a , determine the test parameters of the energy storage system, which can be achieved through the following formula:

[0078] Determine the charge and discharge response time of the energy storage system:

[0079] RT=(d q -d0)*0.1

[0080] Determine the charge and discharge adjustment time of the energy storage system:

[0081] AT=(d a -d0)*0.1

[0082] Determine the charge and discharge conversion time of the energy storage system:

[0083] ZT=(d1-d0)*0.1

[0084] Among them, RT is the charge and discharge time, AT is the charge and discharge adjustment time, ZT is the charge and discharge conversion time, d0 is the first index value, d1 is the second index value, d q is the third index value, d a The fourth index value.

[0085] It should be noted that the tester needs to determine whether the current measured curve is a charge response curve or a discharge response curve based on the actual test items before the test.

[0086] like Figure 4 The flowchart of another energy storage system performance test method shown in the figure assumes that the sampling frequency is 10kHz. According to the preset acquisition frequency, the voltage and current (i.e., the first electrical operation signal) and the trigger pulse are collected every 0.1ms, and a power sequence is generated based on the collected voltage and current data. Compare the difference between the current power value and the previous power value to determine whether the current power value has mutated. If it has mutated, record the first index value corresponding to the mutated power value. Continue to traverse the power sequence, determine the maximum power value in the power sequence, and compare the maximum power value with the multiple power values after the maximum power value in the power sequence to determine whether the power value is decreasing. If it is decreasing, the power value is subtracted from the next power value, and it is determined whether the second difference obtained by the difference is zero. If so, the power rate steady-state value is calculated, and the first power value between the two power values with a difference of zero is used as the second index value. According to the actual test requirements, the test parameters are calculated by the first index value and the second index value to achieve the performance test of the energy storage system.

[0087] An embodiment of the present application provides a non-volatile computer storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured as follows:

[0088] collecting a first electrical operation signal of the energy storage system, performing signal processing on the first electrical operation signal to obtain a processed second electrical operation signal, and transmitting the second electrical operation signal to a synchronization unit;

[0089] Sending a control instruction to the synchronization unit in a specified manner, so that the synchronization unit synchronously processes the control instruction and the second electrical operation signal; the control instruction is a control instruction sent by the controller to perform different performance tests on the energy storage system;

[0090] generating a power sequence according to the second electrical operation signal after synchronization processing, and recording the control instruction and the power sequence after synchronization processing;

[0091] According to the data obtained after recording, the index value in the power sequence is determined to perform a performance test on the energy storage system according to the index value; the index value includes the position of the power value where the mutation occurs in the power sequence.

[0092] The various embodiments in this application are described in a progressive manner. Similar portions between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the device and medium embodiments are generally similar to the method embodiments, so their descriptions are relatively simple. For relevant portions, refer to the descriptions of the method embodiments.

[0093] The devices and media provided in the embodiments of the present application correspond one-to-one to the methods. Therefore, the devices and media also have similar beneficial technical effects to their corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the devices and media will not be repeated here.

[0094] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0095] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0096] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0097] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0098] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0099] Memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

[0100] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0101] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0102] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A method for testing the performance of an energy storage system, characterized in that: The method comprises: collecting a first electrical operation signal of the energy storage system, performing signal processing on the first electrical operation signal to obtain a processed second electrical operation signal, and transmitting the second electrical operation signal to a synchronization unit; Sending a control instruction to the synchronization unit in a specified manner, so that the synchronization unit synchronously processes the control instruction and the second electrical operation signal; the control instruction is a control instruction sent by the controller to perform different performance tests on the energy storage system; generating a power sequence according to the second electrical operation signal after synchronization processing, and recording the control instruction and the power sequence after synchronization processing; Based on the data obtained after recording, the index value in the power sequence is determined to perform a performance test on the energy storage system according to the index value; the index value includes the position of the power value when a mutation occurs in the power sequence and when the power value enters a stable state after the mutation occurs.

2. The energy storage system performance testing method according to claim 1, characterized in that: Sending the control instruction to the synchronization unit in a specified manner so that the synchronization unit performs synchronous processing on the control instruction and the second electrical operation signal specifically includes: converting the control instruction, calculating the frequency of the second electrical operation signal, and performing digital-to-analog conversion on the converted control instruction and the frequency; The converted control instruction and the frequency are synchronously collected through a multi-channel collection unit.

3. The energy storage system performance testing method according to claim 1, characterized in that: Determining an index value in the power sequence based on the data obtained after recording, so as to perform a performance test on the energy storage system based on the index value, specifically including: Traversing the power sequence, and sequentially determining a first difference between a power value included in the power sequence and a previous power value of the power value; When the first difference is not zero, determining a sequence number of the power value in the power sequence as a first index value; Starting from the first index value, traversing the power sequence backward to determine whether the power sequence is in a stable state; When the power sequence is in a stable state, a second index value is determined to perform a performance test on the energy storage system according to the first index value and the second index value.

4. The energy storage system performance testing method according to claim 3, characterized in that: Determining whether the power sequence is in a stable state specifically includes: Traversing the power sequence backward, determining a maximum power value among the power values included in the power sequence, and whether there is a target power value less than the maximum power value after the maximum power value; If so, determining that the power sequence enters an overshoot state at the location of the target power value; In the case where the power sequence enters an overshoot state, taking the position of the target power value as a starting point, sequentially calculating a second difference between a power value included in the power sequence and a power value next to the power value; When the second difference is zero, it is determined that the power sequence is in a stable state.

5. The energy storage system performance testing method according to claim 4, characterized in that: Determining the second index value specifically includes: When the second difference is zero, the serial number corresponding to the first power value of the two power values obtained by subtracting the second difference is determined as the second index value.

6. The energy storage system performance testing method according to claim 4, characterized in that: Performing a performance test on the energy storage system according to the first index value and the second index value specifically includes: Taking the second index value as a starting point, determining a sliding average value between a plurality of power values included in each of the sequence intervals in the power sequence according to a preset sequence interval, and using the sliding average value as a steady-state power value; Calculating the rated power of the energy storage system according to the steady-state power value, and determining a third index value according to the time the energy storage system operates at the rated power; Determining that the charge and discharge power of the energy storage system is maintained within the preset range of the rated power, and determining a fourth index value according to the time for which the energy storage system operates at the charge and discharge power; Determine a test parameter of the energy storage system according to the third index value and the fourth index value.

7. The energy storage system performance testing method according to claim 1, characterized in that: Generating a power sequence according to the second electrical operation signal after synchronization processing, specifically comprising: determining, according to the frequency of the second electrical operation signal, a plurality of sampling points corresponding to the second electrical operation signal; the second electrical operation signal carries electrical operation parameters of the energy storage system during operation, the electrical operation parameters including voltage and current; A plurality of power values corresponding to the plurality of sampling points are determined according to the voltages and currents respectively corresponding to the plurality of sampling points, so as to generate a power sequence including the plurality of power values.

8. The energy storage system performance testing method according to claim 1, characterized in that: The designated methods include pulse, transmission and communication.

9. The energy storage system performance testing method according to claim 6, characterized in that: Determining a test parameter of the energy storage system according to the third index value and the fourth index value specifically includes: Determine the charge and discharge response time of the energy storage system: RT=(d q -d0)*0.1 Determine the charge and discharge adjustment time of the energy storage system: AT=(d a -d0)*0.1 Determine the charge and discharge conversion time of the energy storage system: ZT=(d1-d0)*0.1 Among them, RT is the charge and discharge response time, AT is the charge and discharge adjustment time, ZT is the charge and discharge conversion time, d0 is the first index value, d1 is the second index value, d q is the third index value, d a The fourth index value.

10. An energy storage system performance testing device, characterized in that: The device comprises: a signal processing unit, configured to collect a first electrical operation signal of the energy storage system, perform signal processing on the first electrical operation signal to obtain a processed second electrical operation signal, and transmit the second electrical operation signal to the synchronization unit; a synchronization unit, configured to synchronously process a control instruction and the second electrical operation signal; the control instruction is a control instruction sent by a controller to perform different performance tests on the energy storage system; A data processing unit is used to generate a power sequence based on the second electrical operation signal after synchronous processing, and to record the control instruction and the power sequence after synchronous processing; it is also used to determine the index value existing in the power sequence based on the data obtained after recording, so as to perform a performance test on the energy storage system according to the index value; the index value includes the position of the power value when a mutation occurs in the power sequence and when the power value enters a stable state after the mutation occurs.

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