Energy storage system power quality detection analysis processing method and system and storage medium

Abstract

This invention provides a method and system for power quality detection, analysis, and processing in an energy storage system, belonging to the field of energy storage device technology. Specifically, it includes: determining the power quality detection and processing sequence for different core regulation combinations based on the similarity of energy storage modules between different core regulation combinations; determining the changing energy storage modules and switching deviation combinations when switching from one core regulation combination to the next based on the detection and processing sequence; and determining the power quality detection and processing method when switching from one switching deviation combination to the next core regulation combination based on the detection and processing sequence of different switching deviation combinations, combined with the changing energy storage modules of different switching deviation modules and the energy storage regulation data of different energy storage regulation combinations. This improves the accuracy of power quality detection results.

Description

Technical Field

[0001] This invention belongs to the field of energy storage device technology, and particularly relates to a method, system and storage medium for power quality detection, analysis and processing of energy storage systems. Background Technology

[0002] As the operating time of energy storage systems increases, the aging of the batteries inevitably leads to deviations in the power quality of the energy storage system. Consequently, the reliability of the energy storage system's regulation and processing may not meet the requirements.

[0003] To address the aforementioned technical problems, existing solutions often involve periodically assessing the power quality of the energy storage system and then optimizing power quality control based on the assessment results. However, these solutions suffer from the following technical drawbacks:

[0004] Because the operating conditions of energy storage systems often change, and the power quality often deviates significantly under different batteries and output power ranges, how to conduct targeted power quality detection and processing of energy storage devices to ensure the accuracy of detection and analysis results has become an urgent technical problem to be solved.

[0005] To address the aforementioned technical problems, this application provides a method, system, and storage medium for power quality detection, analysis, and processing in an energy storage system. Summary of the Invention

[0006] To achieve the objectives of this invention, the following technical solution is adopted:

[0007] Specifically, this application provides a power quality detection and processing method for an energy storage system, which includes:

[0008] S1 uses the energy storage regulation data of the energy storage system to determine the coordinated regulation data between different energy storage modules, and based on the coordinated regulation data between it and other energy storage modules, determines the reference energy storage module among the energy storage modules;

[0009] S2 freely combines other energy storage modules with the reference energy storage module to obtain multiple energy storage module combinations. Based on the energy storage regulation data of different energy storage regulation combinations, a core regulation combination is determined. When the composition data of the core regulation combination does not meet the requirements, proceed to the next step.

[0010] S3 determines the power quality detection and processing sequence of different core regulation combinations based on the similarity of energy storage modules between different core regulation combinations, and determines the changing energy storage modules and switching deviation combinations when switching from one core regulation combination to the next based on the detection and processing sequence.

[0011] S4 determines the power quality detection and processing method when switching from different switching deviation combinations to the next core regulation combination, based on the detection and processing sequence of different switching deviation combinations, combined with the energy storage module changes of different switching deviation modules and the energy storage regulation data of different energy storage regulation combinations.

[0012] The beneficial effects of this invention are as follows:

[0013] In this application, it is determined whether the composition data of the core regulation combination meets the requirements, thereby avoiding the technical problem of power quality detection and processing in all energy storage regulation combinations, which would require multiple charge and discharge processes within a fixed charge and discharge capacity range. Otherwise, the capacity of the energy storage device in the power quality detection and processing of the core regulation combination would be mismatched, and the accuracy of the power quality detection results would be difficult to meet the requirements. Priority is given to ensuring the power quality detection and processing of the core regulation combination with a large number of energy storage regulation processes.

[0014] In this application, based on the detection and processing sequence of different switching deviation combinations, the energy storage modules that change in different switching deviation modules, and the energy storage regulation data of different energy storage regulation combinations, a power quality detection and processing method is determined when switching from different switching deviation combinations to the next core regulation combination. This method not only considers the need to set up energy storage modules for buffer processing when switching from a switching deviation combination to the next core regulation combination due to differences in the number of energy storage modules that need to be changed and the number of energy storage regulation times, but also further considers the number of subsequent switching deviation combinations, thereby avoiding the impact of setting up too many energy storage modules for buffer processing on the reliability of subsequent switching deviation combination detection and processing.

[0015] A further technical solution is that the energy storage regulation data includes the number of times the energy storage system has been regulated in history and the energy storage modules used for different energy storage regulation times.

[0016] It is understood that the energy storage module is composed of multiple battery cells (individual battery cells), and an independent battery module composed of multiple battery cells is used as the energy storage module.

[0017] A further technical solution is that the coordinated adjustment data refers to the number of times the energy storage module performs energy storage adjustment processing together with other energy storage modules.

[0018] A further technical solution involves determining the reference energy storage module within the energy storage module as follows:

[0019] Based on the coordinated adjustment data, the number of times the energy storage module and other energy storage modules in the energy storage system were used simultaneously in history is determined and used as the number of coordinated adjustments.

[0020] The energy storage module is determined to be a reference energy storage module based on the number of times it is coordinated with other energy storage modules.

[0021] A further technical solution is that the method for determining the power quality detection and processing method when the switching deviation combination switches to the next core regulation combination is as follows:

[0022] Based on the detection and processing order of the switching deviation combination, determine the number of subsequent switching deviation combinations and the number of core adjustment combinations, and take the number of subsequent switching deviation combinations as the number of deviation combinations and the number of subsequent core adjustment combinations as the number of core combinations.

[0023] Based on the changes in the energy storage modules when switching from the switching deviation combination to the next core adjustment combination, the buffer energy storage combination of the switching deviation combination is determined, and the number of matching adjustments of the buffer energy storage combination is determined.

[0024] Based on the number of deviation combinations, the number of core combinations, and the number of matching adjustments for the buffer energy storage combination, a method for detecting and processing power quality when the switching deviation combination switches to the next core adjustment combination is determined.

[0025] Secondly, the present invention provides a computer system comprising: a memory and a processor connected in communication, and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the above-described method for power quality detection and analysis of an energy storage system when running the computer program.

[0026] Thirdly, the present invention provides a computer storage medium storing a computer program, which, when executed in a computer, causes the computer to perform the above-described method for power quality detection and analysis of an energy storage system.

[0027] Other features and advantages will be set forth in the following description, and the objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0029] The above and other features and advantages of the present invention will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0030] Figure 1 This is a flowchart of a power quality detection, analysis and processing method for an energy storage system;

[0031] Figure 2 This is a flowchart illustrating the method for determining the reference energy storage module within the energy storage module.

[0032] Figure 3 This is a flowchart illustrating the method for determining the core regulatory combination;

[0033] Figure 4 This is a flowchart illustrating the method for determining the power quality detection and processing sequence of the core regulation combination;

[0034] Figure 5 It is a framework diagram of a computer system. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0036] In this application, based on the number of times energy storage regulation processes were simultaneously performed on combinations of different energy storage modules in history, a power quality detection and processing strategy for combinations of different energy storage modules is determined. In order to avoid the need for repeated charging and discharging to achieve power quality detection, when there are a large number of core regulation combinations with a high number of energy storage regulation processes, power quality detection is performed only on the core regulation combinations. Based on the change data of energy storage modules between core regulation combinations, it is determined whether to set up a buffer energy storage regulation combination between the core regulation combinations, so as to avoid the impact of excessive switching changes on the operational stability of the energy storage system.

[0037] It should be noted that the power quality detection in this application utilizes harmonic detection equipment and voltage detection equipment to detect and address power quality issues such as excessive harmonics and voltage fluctuations.

[0038] Example 1

[0039] like Figure 1 As shown, this application provides a power quality detection and processing method for an energy storage system, specifically including:

[0040] S1 uses the energy storage regulation data of the energy storage system to determine the coordinated regulation data between different energy storage modules, and based on the coordinated regulation data between it and other energy storage modules, determines the reference energy storage module among the energy storage modules;

[0041] Furthermore, the energy storage regulation data includes the number of times the energy storage system has been regulated in history, as well as the energy storage modules used for different energy storage regulation times.

[0042] It is understood that the energy storage module is composed of multiple battery cells (individual battery cells), and an independent battery module composed of multiple battery cells is used as the energy storage module.

[0043] Specifically, the coordinated adjustment data refers to the number of times the energy storage module performs energy storage adjustment processing together with other energy storage modules.

[0044] Specifically, such as Figure 2 As shown, the method for determining the reference energy storage module in the energy storage module is as follows:

[0045] Based on the coordinated adjustment data, the number of times the energy storage module and other energy storage modules in the energy storage system were used simultaneously in history is determined and used as the number of coordinated adjustments.

[0046] The energy storage module is determined to be a reference energy storage module based on the number of times it is coordinated with other energy storage modules.

[0047] It is understandable that the energy storage module with the highest sum of coordinated adjustment times with other energy storage modules is used as the benchmark energy storage module.

[0048] Optionally, the method for determining the reference energy storage module in the energy storage module is as follows:

[0049] Based on the coordinated adjustment data, the number of times the energy storage module and other energy storage modules in the energy storage system were used simultaneously in history is determined and used as the number of coordinated adjustments.

[0050] Based on the number of coordinated adjustments with other energy storage modules, identify other energy storage modules whose number of coordinated adjustments exceeds a preset threshold and treat them as associated energy storage modules.

[0051] By using the associated energy storage modules of the energy storage module, it is determined whether the energy storage module is a reference energy storage module.

[0052] Understandably, the benchmark energy storage module is the energy storage module with the largest number of associated energy storage modules.

[0053] S2 freely combines other energy storage modules with the reference energy storage module to obtain multiple energy storage module combinations. Based on the energy storage regulation data of different energy storage regulation combinations, a core regulation combination is determined. When the composition data of the core regulation combination does not meet the requirements, proceed to the next step.

[0054] Furthermore, multiple energy storage module combinations can be obtained through free combination, specifically including:

[0055] Other energy storage modules can be freely combined with the reference energy storage module to obtain multiple energy storage module combinations.

[0056] In one possible embodiment, if the reference energy storage module is A, then for modules B and C, we can obtain energy storage module combinations A, B; A, C; A, B, C.

[0057] Specifically, such as Figure 3 As shown, the method for determining the core adjustment combination is as follows:

[0058] Using energy storage regulation data of different energy storage regulation combinations, determine the number of times the energy storage module corresponding to the energy storage regulation combination has performed energy storage regulation simultaneously in history, and use this as the number of matching regulation times;

[0059] Based on the number of matching adjustments, determine whether the energy storage adjustment combination is a core adjustment combination.

[0060] It is understandable that energy storage regulation combinations that meet the matching adjustment requirements (i.e., those with a higher number of matching adjustment times) are designated as core regulation combinations. Specifically, when the number of matching adjustment times exceeds a preset threshold, the energy storage regulation combination is determined as a core regulation combination. The preset threshold is determined based on the number of energy storage regulation times of the energy storage system. The more energy storage regulation times there are, the more charge and discharge cycles the energy storage module undergoes, thus increasing the probability of power quality problems. Therefore, the lower the preset threshold, the better. In one possible embodiment, the preset threshold can be set to 20 times when the number of energy storage regulation times is between 0 and 500, and to 15 times when it exceeds 500.

[0061] Understandably, when there is no core regulation combination, after the energy storage battery is fully charged, i.e., charged to its rated capacity, the power quality detection and processing sequence is determined according to the similarities of different energy storage regulation combinations. Specifically, the power quality detection and processing sequence is determined with the goal of minimizing the number of energy storage modules that change from one energy storage regulation combination to the next.

[0062] Specifically, determining that the constituent data of the core adjustment combination does not meet the requirements includes:

[0063] Obtain the number of the core adjustment combinations;

[0064] Based on the number of the core control combinations, determine whether the composition data of the core control combinations meets the requirements.

[0065] It should be noted that when the number of core regulation combinations is large, i.e., exceeds the threshold, the probability of abnormal power quality in the energy storage battery when the remaining capacity is small is higher. Therefore, if power quality testing is performed on all energy storage regulation combinations, the duration of the energy storage battery when the remaining capacity is small may be too short to effectively test the power quality of the core regulation combinations. Therefore, it is determined that the composition data of the core regulation combinations does not meet the requirements.

[0066] It is understood that the threshold is determined based on the battery capacity of the energy storage module of the energy storage system. The larger the battery capacity, the larger the threshold. In one possible embodiment, the threshold is a fixed value of 30.

[0067] Optionally, determining that the constituent data of the core adjustment combination does not meet the requirements specifically includes:

[0068] S21 Obtain the number of the core regulation combination and the number of the energy storage regulation combination;

[0069] It should be noted that if the number of energy storage regulation combinations is small in the above steps, i.e. less than the preset threshold for the number of energy storage regulation combinations, then the number of energy storage regulation combinations is relatively small and will not affect the reliability of the power quality detection and processing of the core regulation combination. Therefore, it can be directly determined that the composition data of the core regulation combination meets the requirements.

[0070] Additionally, it's understandable that if the number of energy storage regulation combinations is not less than the preset threshold for the number of energy storage regulation combinations in the above steps, it's also necessary to check if the number of core regulation combinations meets the requirements. It's understandable that when the number of core regulation combinations is large, exceeding the threshold, the probability of abnormal power quality in the energy storage battery when its remaining capacity is low is greater. Therefore, if power quality testing is performed on all energy storage regulation combinations, the duration of low remaining capacity in the energy storage battery might be too short to effectively test the power quality of the core regulation combinations. Therefore, it's determined that the composition data of the core regulation combinations does not meet the requirements.

[0071] Furthermore, when the number of core adjustment combinations is not large, if the number of core adjustment combinations is less than the preset core combination number threshold, then since the number of core adjustment combinations is small, it can be directly determined that the composition data of the core adjustment combinations meets the requirements. Otherwise, proceed to the next step.

[0072] S22 Based on the energy storage regulation data of the core regulation combination, determine the ratio of the number of matching regulation of different core regulation combinations to the number of matching regulation of different non-core regulation combinations, and determine the regulation demand weight of different core regulation combinations based on the ratio.

[0073] It should be noted that in the above steps, it is necessary to determine whether the sum of the matching adjustment times of different core adjustment combinations meets the requirements. It can be understood that when the proportion of the sum of the matching adjustment times of different core adjustment combinations in the historical adjustment times of the energy storage system is less than the preset proportion threshold, in order to ensure the reliability of the detection and processing of the core adjustment combination, it can be directly determined that the composition data of the core adjustment combination meets the requirements.

[0074] However, if the sum of the number of matching adjustments of different core adjustment combinations accounts for less than the percentage of the historical adjustment count in the energy storage system, then the number of adjustments of the core adjustment combination is too high. Therefore, it is necessary to further determine whether the sum of the number of matching adjustments of different core adjustment combinations meets the requirements.

[0075] It is understandable that when the sum of the number of matching adjustments of different adjustment combinations does not meet the requirements, that is, when the sum of the number of matching adjustments of different adjustment combinations is greater than a certain threshold, it can be directly determined that the constituent data of the core adjustment combination does not meet the requirements.

[0076] It should also be noted that, even if the sum of the number of matching adjustments of different adjustment combinations meets the requirements, in one possible embodiment, the adjustment demand weight is determined based on the product of the number of matching adjustments of the core adjustment combination and the ratio of the number of matching adjustments of different combinations that do not belong to the core adjustment combination.

[0077] In one possible embodiment, if the number of core adjustment combinations whose adjustment demand weights are greater than a preset demand threshold does not meet the requirements (i.e., it is greater than the threshold), then it can be directly determined that the constituent data of the core adjustment combination does not meet the requirements. Otherwise, proceed to the next step.

[0078] S23 determines whether the composition data of the core regulation combination meets the requirements based on the number of the core regulation combination and the number of the energy storage regulation combination, and in combination with the regulation demand weight of different core regulation combinations.

[0079] Understandably, in one possible embodiment, the regulation demand value of the core regulation combination is determined by summing the regulation demand weights of different core regulation combinations. Based on the regulation demand value and the number of energy storage regulation combinations, a mapping function is constructed to determine the detection matching value of the core regulation combination. When the detection matching value is greater than a preset matching threshold, it is determined that the constituent data of the core regulation combination meets the requirements. In one possible embodiment, the mapping function is constructed using a mathematical model based on the analytic hierarchy process.

[0080] S3 determines the power quality detection and processing sequence of different core regulation combinations based on the similarity of energy storage modules between different core regulation combinations, and determines the changing energy storage modules and switching deviation combinations when switching from one core regulation combination to the next based on the detection and processing sequence.

[0081] Specifically, such as Figure 4 As shown, the method for determining the power quality detection and processing sequence of the core regulation combination is as follows:

[0082] By freely combining the core adjustment combinations, multiple detection and processing sequences can be obtained;

[0083] Based on the deviation of energy storage modules in different adjacent core regulation combinations in different detection and processing sequences, determine the number of deviations between energy storage modules in different adjacent core regulation combinations.

[0084] The power quality detection and processing sequence of the core regulation combination is determined based on the number of deviations of the energy storage modules between different core regulation combinations.

[0085] It is understood that the detection and processing sequence scheme is freely placed according to the position of different core adjustment combinations. In one possible embodiment, for core adjustment combinations A, B, and C, the detection and processing sequence scheme includes multiple schemes such as ABC, BCA, BAC, CAB, ACB, and CBA, which realizes the determination of different possible detection and processing sequences. Among them, the detection and processing sequence scheme with the minimum sum of the number of deviations between energy storage modules between different adjustment combinations is used to determine the power quality detection and processing sequence of the core adjustment combination.

[0086] Specifically, the method for determining the switching deviation combination is as follows:

[0087] The variable energy storage module when the core regulation combination is switched to the next core regulation combination is called the variable energy storage module.

[0088] Based on the number of the variable energy storage modules, determine whether the core adjustment combination is a switching deviation combination.

[0089] It is understood that when the number of variable energy storage modules, i.e. the number of deviations, does not meet the requirements, the core adjustment combination is determined as a switching deviation combination. In one possible embodiment, it is determined based on the ratio of the number of variable energy storage modules to the number of energy storage modules in the switching deviation combination. When the ratio is greater than 0.4, the number of variable energy storage modules is relatively large during the adjustment process, which may lead to the unstable operation of the energy storage system. Therefore, it can be used as a switching deviation combination.

[0090] S4 determines the power quality detection and processing method when switching from different switching deviation combinations to the next core regulation combination, based on the detection and processing sequence of different switching deviation combinations, combined with the energy storage module changes of different switching deviation modules and the energy storage regulation data of different energy storage regulation combinations.

[0091] Specifically, the method for determining the power quality detection and processing method when the switching deviation combination switches to the next core regulation combination is as follows:

[0092] Based on the detection and processing order of the switching deviation combination, determine the number of subsequent switching deviation combinations and the number of core adjustment combinations, and take the number of subsequent switching deviation combinations as the number of deviation combinations and the number of subsequent core adjustment combinations as the number of core combinations.

[0093] Based on the changes in the energy storage modules when switching from the switching deviation combination to the next core adjustment combination, the buffer energy storage combination of the switching deviation combination is determined, and the number of matching adjustments of the buffer energy storage combination is determined.

[0094] Based on the number of deviation combinations, the number of core combinations, and the number of matching adjustments for the buffer energy storage combination, a method for detecting and processing power quality when the switching deviation combination switches to the next core adjustment combination is determined.

[0095] It is understood that the buffer energy storage combination is determined by adding the switching deviation combination to the energy storage module that needs to be changed. Specifically, the target is to minimize the number of energy storage modules when switching from the switching deviation combination to the buffer energy storage combination and then switching from the buffer energy storage combination to the next core regulation combination.

[0096] In one possible embodiment, if the switch is from ABC to AD, the energy storage module that needs to be changed is BCD, and the buffer energy storage module is ABD or ACD, thus ensuring the switching process.

[0097] Optionally, in the above steps, it is first determined whether the number of variable energy storage modules in the switching deviation combination is too large. If the number of variable energy storage modules is smaller than the number of switching deviation combinations, that is, when the number of variable energy storage modules in the switching deviation combination is large, in one possible embodiment, the switching deviation combination with a larger number of variable energy storage modules is considered a severe deviation combination. When the proportion of severe deviation combinations in the switching deviation combinations is less than 10%, it can be directly determined that power quality detection processing of the buffer energy storage combination is required during the switching process. When there are multiple buffer energy storage combinations, the buffer energy storage module with the most matching adjustment times is used for power quality detection processing. That is, first, a switching deviation combination switches to a buffer energy storage combination, and then a buffer energy storage combination switches to the next core adjustment combination.

[0098] Furthermore, it is understood that if the number of variable energy storage modules is not less than the number of switching deviation combinations, and when the number of severe deviation combinations in the switching deviation combinations is greater than 30%, it can be directly determined that no power quality detection processing of the buffer energy storage combination is required during the switching process.

[0099] Furthermore, when the proportion of severely deviated combinations in the core regulation combination is between 10% and 30%, it is also necessary to determine whether the number of matching adjustments of the buffer energy storage combination meets the requirements. When the number of matching adjustments of the buffer energy storage combination is greater than the preset matching adjustment threshold, or when the number of other switching deviation combinations with more matching adjustments than the buffer energy storage combination is small, in one possible embodiment, when the proportion of switching deviation combinations is less than 10%, it can be directly determined that the power quality detection processing of the buffer energy storage combination needs to be performed during the switching process. When there are multiple buffer energy storage combinations, the buffer energy storage module with the most matching adjustments is used for power quality detection processing, that is, first a switching deviation combination switches to a buffer energy storage combination, and then a buffer energy storage combination switches to the next core regulation combination.

[0100] Additionally, it should be noted that when the number of matching adjustments of the buffer energy storage combination meets the requirements, if both the number of deviation combinations and the number of core combinations meet the requirements (i.e., the remaining number of deviation combinations accounts for less than 10% of the total number of deviation energy storage combinations and the remaining number of core combinations accounts for less than 20% of the total number of core energy storage combinations), then it can be directly determined that power quality detection processing of the buffer energy storage combination is required during the switching process. When there are multiple buffer energy storage combinations, the buffer energy storage module with the most matching adjustments is used for power quality detection processing. That is, first, a deviation combination is switched to a buffer energy storage combination, and then a buffer energy storage combination is switched to the next core adjustment combination. If the requirements are not met, then power quality detection processing of the buffer energy storage combination is not required, and the switch is directly performed from the deviation combination to the next core adjustment combination.

[0101] Optionally, the method for determining the power quality detection and processing method when the switching deviation combination switches to the next core regulation combination is as follows:

[0102] Based on the changes in the energy storage modules when switching from the switching deviation combination to the next core adjustment combination, the buffer energy storage combination of the switching deviation combination is determined, and the number of matching adjustments of the buffer energy storage combination is determined.

[0103] Optionally, if the number of matching adjustments of the buffer energy storage combination is too large in the above steps, i.e., it is greater than the preset matching adjustment number threshold, then it can be directly determined that the power quality detection of the buffer energy storage combination needs to be performed during the switching process. When there are multiple buffer energy storage combinations, the buffer energy storage module with the most matching adjustments is used for power quality detection.

[0104] Furthermore, in the above steps, if the number of matching adjustments of the buffer energy storage combination is not large, and if the number of matching adjustments is greater than that of other switching deviation combinations of the buffer energy storage combination is small, in one possible embodiment, when the proportion of the number of switching deviation combinations is less than 10%, it can be directly determined that the power quality detection process of the buffer energy storage combination needs to be performed during the switching process. When there are multiple buffer energy storage combinations, the buffer energy storage module with the most matching adjustments is used for power quality detection. That is, first, a switching deviation combination switches to a buffer energy storage combination, and then a buffer energy storage combination switches to the next core adjustment combination.

[0105] Additionally, it is understood that if the number of matching adjustments is greater than the number of other switching deviation combinations of the buffer energy storage combination, then proceed to the next step.

[0106] Based on the detection and processing order of the switching deviation combination, determine the number of subsequent switching deviation combinations and the number of core adjustment combinations, and take the number of subsequent switching deviation combinations as the number of deviation combinations and the number of subsequent core adjustment combinations as the number of core combinations. Based on the number of core combinations and the number of deviation combinations, determine the switching impact value.

[0107] It should be noted that, in one possible embodiment, if both the number of deviation combinations and the number of core combinations meet the requirements, that is, the remaining number of deviation combinations accounts for less than 10% of the total number of deviation energy storage combinations and the remaining number of core combinations accounts for less than 20% of the total number of core energy storage combinations, then it can be directly determined that power quality detection processing of buffer energy storage combinations is required during the switching process. When there are multiple buffer energy storage combinations, the buffer energy storage module with the most matching adjustment times is used for power quality detection processing. That is, first, a deviation combination is switched to a buffer energy storage combination, and then a buffer energy storage combination is switched to the next core adjustment combination.

[0108] It should also be noted that if either the number of deviation combinations or the number of core combinations does not meet the requirements, the switching impact value is determined by multiplying the ratio of the number of core combinations to the number of core adjustment combinations and the ratio of the number of deviation combinations to the number of switching deviation combinations.

[0109] In one possible embodiment, if the switching impact value is greater than a preset switching impact threshold, then it can be directly determined that no power quality detection processing of the buffer energy storage combination is required during the switching process.

[0110] Based on the switching impact value and the number of matching adjustments of the buffer energy storage combination, a method for detecting and processing power quality when the switching deviation combination switches to the next core adjustment combination is determined.

[0111] In one possible embodiment, in the above steps, the switching matching value of the switching deviation combination is determined based on the number of matching adjustments and the switching impact value. The larger the number of matching adjustments and the smaller the switching impact value, the larger the switching matching value. In one possible embodiment, this is constructed using a mathematical model based on expert scoring.

[0112] Specifically, when the switching matching value is greater than the preset matching threshold, it can be directly determined that the power quality detection of the buffer energy storage combination needs to be performed during the switching process. When there are multiple buffer energy storage combinations, the buffer energy storage module with the most matching adjustments is used for power quality detection. That is, first, a switching deviation combination switches to a buffer energy storage combination, and then a buffer energy storage combination switches to the next core regulation combination. In other cases, there is no need to perform power quality detection of the buffer energy storage combination, that is, the switching deviation combination directly switches to the next core regulation combination.

[0113] Example 2

[0114] Secondly, such as Figure 5 As shown, the present invention provides a computer system, including: a memory and a processor connected in communication, and a computer program stored in the memory and capable of running on the processor. When the processor runs the computer program, it executes the above-described method for power quality detection and analysis of an energy storage system.

[0115] Example 3

[0116] Thirdly, the present invention provides a computer storage medium storing a computer program, which, when executed in a computer, causes the computer to perform the above-described method for power quality detection and analysis of an energy storage system.

[0117] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the embodiments of apparatus, devices, and non-volatile computer storage media are basically similar to the method embodiments, so the descriptions are relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0118] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0119] The above description is merely one or more embodiments of this specification and is not intended to limit this specification. Various modifications and variations can be made to the one or more embodiments of this specification by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of one or more embodiments of this specification should be included within the scope of the claims of this specification.

Claims

1. A method for detecting, analyzing, and processing the power quality of an energy storage system, characterized in that, Specifically, it includes: Using the energy storage regulation data of the energy storage system, determine the coordinated regulation data between different energy storage modules, and based on the coordinated regulation data between the energy storage system and other energy storage modules, determine the benchmark energy storage module among the energy storage modules; Other energy storage modules are freely combined with the reference energy storage module to obtain multiple energy storage module combinations. Based on the energy storage regulation data of different energy storage regulation combinations, a core regulation combination is determined. When the composition data of the core regulation combination does not meet the requirements, proceed to the next step. Based on the similarity of energy storage modules between different core regulation combinations, the power quality detection and processing sequence of different core regulation combinations is determined, and the changing energy storage modules and switching deviation combinations are determined when the core regulation combination switches to the next core regulation combination based on the detection and processing sequence. Based on the detection and processing sequence of different switching deviation combinations, and combined with the energy storage module changes of different switching deviation modules and the energy storage regulation data of different energy storage regulation combinations, the power quality detection and processing method is determined when switching from different switching deviation combinations to the next core regulation combination.

2. The power quality detection, analysis, and processing method for an energy storage system as described in claim 1, characterized in that, The energy storage regulation data includes the number of times the energy storage system has been regulated in history, as well as the energy storage modules used for different energy storage regulation times.

3. The power quality detection, analysis, and processing method for an energy storage system as described in claim 1, characterized in that, The coordinated regulation data refers to the number of times the energy storage module performs energy storage regulation processing together with other energy storage modules.

4. The power quality detection, analysis, and processing method for an energy storage system as described in claim 1, characterized in that, The method for determining the reference energy storage module in the energy storage module is as follows: Based on the coordinated adjustment data, the number of times the energy storage module and other energy storage modules in the energy storage system were used simultaneously in history is determined and used as the number of coordinated adjustments. The energy storage module is determined to be a reference energy storage module based on the number of times it is coordinated with other energy storage modules.

5. The power quality detection, analysis, and processing method for an energy storage system as described in claim 4, characterized in that, The energy storage module with the highest sum of coordinated adjustment times with other energy storage modules is used as the benchmark energy storage module.

6. The power quality detection, analysis, and processing method for an energy storage system as described in claim 1, characterized in that, Multiple energy storage module combinations can be obtained through free combination, specifically including: Other energy storage modules can be freely combined with the reference energy storage module to obtain multiple energy storage module combinations.

7. The power quality detection, analysis, and processing method for an energy storage system as described in claim 1, characterized in that, The determination that the constituent data of the core adjustment combination does not meet the requirements specifically includes: Obtain the number of the core adjustment combinations; Based on the number of the core control combinations, determine whether the composition data of the core control combinations meets the requirements.

8. The power quality detection, analysis, and processing method for an energy storage system as described in claim 1, characterized in that, The method for determining the power quality detection and processing method when the switching deviation combination switches to the next core regulation combination is as follows: Based on the detection and processing order of the switching deviation combination, determine the number of subsequent switching deviation combinations and the number of core adjustment combinations, and take the number of subsequent switching deviation combinations as the number of deviation combinations and the number of subsequent core adjustment combinations as the number of core combinations. Based on the changes in the energy storage modules when switching from the switching deviation combination to the next core adjustment combination, the buffer energy storage combination of the switching deviation combination is determined, and the number of matching adjustments of the buffer energy storage combination is determined. Based on the number of deviation combinations, the number of core combinations, and the number of matching adjustments for the buffer energy storage combination, a method for detecting and processing power quality when the switching deviation combination switches to the next core adjustment combination is determined.

9. A computer system, comprising: A memory and processor connected by communication, and a computer program stored in the memory and capable of running on the processor, characterized in that, when the processor runs the computer program, it executes a power quality detection and analysis processing method for an energy storage system according to any one of claims 1-8.

10. A computer storage medium storing a computer program thereon, wherein when the computer program is executed in a computer, the computer executes a power quality detection and analysis processing method for an energy storage system according to any one of claims 1-8.

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