Performance evaluation method and system of electric power comprehensive compensation system and medium

Abstract

The invention provides a performance evaluation method and system of an electric power comprehensive compensation system and a medium. The method comprises the following steps: carrying out performance test on the power comprehensive compensation system to obtain test data, processing according to the test data to obtain a reactive compensation effect evaluation index, a harmonic suppression capability evaluation index and a three-phase imbalance regulation capability evaluation index, and further processing to obtain a power quality evaluation index, then processing according to the test data to obtain a system operation stability evaluation factor, further processing to obtain a system operation stability evaluation index, finally processing according to the electric energy quality evaluation index and the system operation stability evaluation index to obtain a system performance comprehensive evaluation index, and performing qualification judgment. Therefore, the technology for comprehensively evaluating the performance of the electric power comprehensive compensation system is realized.

Description

Technical Field

[0001] The present application relates to the technical field of power system performance evaluation, and in particular to a performance evaluation method, system and medium for a comprehensive power compensation system. Background Art

[0002] The power comprehensive compensation system is a system that can comprehensively optimize various power quality problems in the power system. It integrates functional modules such as reactive power compensation, harmonic suppression, and three-phase unbalanced regulation, aiming to improve the power quality of the power system and enhance the stability and reliability of the power system. In practical applications, in order to ensure that the power comprehensive compensation system can effectively play its role and meet the power quality requirements of the power system, it is particularly important to accurately and comprehensively evaluate its performance. The existing evaluation methods only focus on one or a few performance indicators, lack of systematic integrated analysis of various performance indicators, and it is difficult to provide comprehensive and in-depth system performance evaluation results, which is not conducive to the overall optimization and improvement of the power comprehensive compensation system.

[0003] In view of the above problems, effective technical solutions are urgently needed. Summary of the invention

[0004] The purpose of this application is to provide a performance evaluation method, system and medium for an integrated power compensation system, which provides a basis for optimizing and improving the integrated power compensation system by comprehensively and quantitatively evaluating the performance of the integrated power compensation system in terms of reactive power compensation effect, harmonic suppression capability, three-phase unbalanced regulation capability, power quality, system operation stability, etc.

[0005] The present application also provides a performance evaluation method for an electric power comprehensive compensation system, comprising the following steps: Conduct performance tests on the comprehensive power compensation system to obtain test data, including reactive power compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data; According to the reactive power compensation effect data, a reactive power compensation effect evaluation index is obtained; according to the harmonic suppression ability data, a harmonic suppression ability evaluation index is obtained; According to the three-phase unbalanced regulation capability data, a three-phase unbalanced regulation capability evaluation index is obtained; according to the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index, a power quality evaluation index is obtained; Obtaining a system operation stability evaluation factor according to system operation stability data processing; Obtaining a system operation stability evaluation index according to the system operation stability evaluation factor and the fault detection data processing; The system performance comprehensive evaluation index is obtained according to the power quality evaluation index and the system operation stability evaluation index, and a qualification determination is performed.

[0006] Optionally, in the performance evaluation method of the comprehensive power compensation system described in the present application, the comprehensive power compensation system is subjected to a performance test to obtain test data, including reactive power compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data, including: The reactive power compensation effect data includes reactive power compensation power factor difference, reactive power reduction and line loss power, and the harmonic suppression capability data includes current harmonic distortion rate, voltage harmonic distortion rate, harmonic suppression power factor difference and equipment action deviation data; The three-phase unbalanced regulation capability data includes the three-phase voltage unbalance degree and the three-phase current unbalance degree, and the system operation stability data includes the number of voltage fluctuations, the number of voltage flickers and the number of voltage resonances; The fault detection data includes the number of overvoltage faults and the number of overcurrent faults.

[0007] Optionally, in the performance evaluation method of the comprehensive power compensation system described in the present application, the obtaining of a reactive compensation effect evaluation index according to the reactive compensation effect data processing and the obtaining of a harmonic suppression capability evaluation index according to the harmonic suppression capability data processing include: Obtaining a reactive compensation effect evaluation index according to the reactive compensation power factor difference, reactive power reduction and line loss power processing; The harmonic suppression capability evaluation index is obtained by processing the current harmonic distortion rate, voltage harmonic distortion rate, harmonic suppression power factor difference and equipment action deviation data.

[0008] Optionally, in the performance evaluation method of the comprehensive power compensation system described in the present application, the processing of the three-phase unbalanced regulation capability data to obtain a three-phase unbalanced regulation capability evaluation index, and the processing of the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index to obtain a power quality evaluation index include: Obtaining a three-phase unbalance regulation capability evaluation index according to the three-phase voltage unbalance and the three-phase current unbalance; The power quality evaluation index is obtained by processing the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index.

[0009] Optionally, in the performance evaluation method of the comprehensive power compensation system described in the present application, the obtaining of the system operation stability evaluation factor according to the system operation stability data processing includes: The system operation stability evaluation factor is obtained according to the voltage fluctuation times, voltage flicker times and voltage resonance times.

[0010] Optionally, in the performance evaluation method of the comprehensive power compensation system described in the present application, the obtaining of the system operation stability evaluation index according to the system operation stability evaluation factor and the fault detection data processing includes: A system operation stability evaluation index is obtained according to the system operation stability evaluation factor and the number of overvoltage faults and the number of overcurrent faults.

[0011] Optionally, in the performance evaluation method of the comprehensive power compensation system described in the present application, the obtaining of the system performance comprehensive evaluation index according to the power quality evaluation index and the system operation stability evaluation index, and performing qualification determination, includes: Inputting the power quality evaluation index and the system operation stability evaluation index into a preset system comprehensive performance evaluation model to obtain a system performance comprehensive evaluation index; The system performance comprehensive evaluation index is compared with a preset system performance comprehensive evaluation index threshold. If the threshold comparison result does not meet the preset threshold comparison result requirement, a determination is made that the system performance evaluation is unqualified.

[0012] In a second aspect, the present application provides a performance evaluation system for an integrated power compensation system, the system comprising: a memory and a processor, wherein the memory stores a program of a performance evaluation method for the integrated power compensation system, and when the program of the performance evaluation method for the integrated power compensation system is executed by the processor, the following steps are implemented: Conduct performance tests on the comprehensive power compensation system to obtain test data, including reactive power compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data; According to the reactive power compensation effect data, a reactive power compensation effect evaluation index is obtained; according to the harmonic suppression ability data, a harmonic suppression ability evaluation index is obtained; According to the three-phase unbalanced regulation capability data, a three-phase unbalanced regulation capability evaluation index is obtained; according to the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index, a power quality evaluation index is obtained; Obtaining a system operation stability evaluation factor according to system operation stability data processing; Obtaining a system operation stability evaluation index according to the system operation stability evaluation factor and the fault detection data processing; The system performance comprehensive evaluation index is obtained according to the power quality evaluation index and the system operation stability evaluation index, and a qualification determination is performed.

[0013] Optionally, in the performance evaluation system of the comprehensive power compensation system described in the present application, the comprehensive power compensation system is subjected to a performance test to obtain test data, including reactive power compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data, including: The reactive power compensation effect data includes reactive power compensation power factor difference, reactive power reduction and line loss power, and the harmonic suppression capability data includes current harmonic distortion rate, voltage harmonic distortion rate, harmonic suppression power factor difference and equipment action deviation data; The three-phase unbalanced regulation capability data includes the three-phase voltage unbalance degree and the three-phase current unbalance degree, and the system operation stability data includes the number of voltage fluctuations, the number of voltage flickers and the number of voltage resonances; The fault detection data includes the number of overvoltage faults and the number of overcurrent faults.

[0014] In a third aspect, the present application also provides a computer-readable storage medium, which stores a performance evaluation method program for an integrated power compensation system. When the performance evaluation method program for an integrated power compensation system is executed by a processor, the steps of the performance evaluation method for an integrated power compensation system as described in any one of the above items are implemented.

[0015] From the above, it can be seen that the performance evaluation method, system and medium of the comprehensive power compensation system provided in the present application provide a basis for the optimization and improvement of the comprehensive power compensation system by comprehensively and quantitatively evaluating the performance of the comprehensive power compensation system in terms of reactive power compensation effect, harmonic suppression capability, three-phase unbalanced regulation capability, power quality, system operation stability, etc.

[0016] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the embodiments of the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A flow chart of a performance evaluation method for an electric power comprehensive compensation system provided in an embodiment of the present application; Figure 2 A flow chart of obtaining a reactive compensation effect evaluation index and a harmonic suppression capability evaluation index of a performance evaluation method of a comprehensive power compensation system provided in an embodiment of the present application; Figure 3 A flow chart of obtaining a power quality evaluation index in a performance evaluation method for an integrated power compensation system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0020] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0021] Please refer to Figure 1 , Figure 1 The flowchart of the performance evaluation method of the comprehensive power compensation system in some embodiments of the present application. The performance evaluation method of the comprehensive power compensation system is used in terminal equipment, such as computers, mobile terminals, etc. The performance evaluation method of the comprehensive power compensation system includes the following steps: S11. Perform performance tests on the comprehensive power compensation system to obtain test data, including reactive power compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data, and fault detection data; S12, obtaining a reactive compensation effect evaluation index according to the reactive compensation effect data processing, and obtaining a harmonic suppression capability evaluation index according to the harmonic suppression capability data processing; S13, obtaining a three-phase unbalanced regulation capability evaluation index according to the three-phase unbalanced regulation capability data, and obtaining a power quality evaluation index according to the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index; S14, obtaining a system operation stability evaluation factor according to system operation stability data processing; S15, obtaining a system operation stability evaluation index according to the system operation stability evaluation factor and the fault detection data; S16. Obtain a comprehensive system performance evaluation index based on the power quality evaluation index and the system operation stability evaluation index, and make a qualification determination.

[0022] It should be noted that the reactive compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data obtained by the performance test of the comprehensive power compensation system are processed to obtain the reactive compensation effect evaluation index, harmonic suppression capability evaluation index and three-phase unbalanced regulation capability evaluation index, and further processed to obtain the power quality evaluation index, and then the system operation stability evaluation factor is obtained according to the test data processing, and further processed to obtain the system operation stability evaluation index, and finally the system performance comprehensive evaluation index is obtained according to the power quality evaluation index and the system operation stability evaluation index, and the qualification is determined. Thus, the technology of comprehensive evaluation of the performance of the comprehensive power compensation system is realized, and the basis for the optimization and improvement of the comprehensive power compensation system is provided.

[0023] According to an embodiment of the present invention, the performance test of the comprehensive power compensation system is performed to obtain test data, including reactive power compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data, including: The reactive power compensation effect data includes reactive power compensation power factor difference, reactive power reduction and line loss power, and the harmonic suppression capability data includes current harmonic distortion rate, voltage harmonic distortion rate, harmonic suppression power factor difference and equipment action deviation data; The three-phase unbalanced regulation capability data includes the three-phase voltage unbalance degree and the three-phase current unbalance degree, and the system operation stability data includes the number of voltage fluctuations, the number of voltage flickers and the number of voltage resonances; The fault detection data includes the number of overvoltage faults and the number of overcurrent faults.

[0024] It should be noted that the power factor refers to the ratio of active power to apparent power in an AC circuit. In the absence of reactive power compensation, inductive loads (such as motors, transformers, etc.) will consume a large amount of inductive reactive power, which will reduce the power factor. After reactive power compensation, the power factor can be improved. The reactive compensation power factor difference indicates the power factor difference before and after reactive power compensation. The larger the difference, the better the reactive power compensation effect. The reactive power reduction refers to the difference in reactive power in the power grid before and after reactive power compensation measures are taken. The larger the reactive power reduction, the better the compensation effect. Reactive power compensation will reduce the line current, thereby reducing line losses. The line loss power can be expressed by the power difference between the beginning and the end of the line. The lower the line loss power after compensation, the better the reactive compensation effect.

[0025] The harmonic distortion rate of current and the harmonic distortion rate of voltage are important indicators for measuring harmonic content. The harmonic distortion rate of current refers to the percentage of the harmonic current root mean square value to the fundamental current root mean square value, which reflects the degree of distortion of the current waveform. The harmonic distortion rate of voltage refers to the percentage of the harmonic voltage root mean square value to the fundamental voltage root mean square value, which is used to measure the distortion of the voltage waveform. The lower the harmonic distortion rate of current and voltage, the less harmonic content in the power grid, and the better the harmonic suppression effect of the equipment. The difference in harmonic suppression power factor can be obtained by calculating the difference in power factor before and after harmonic compensation. The larger the difference in harmonic suppression power factor, the better the harmonic suppression effect. Power compensation can suppress voltage fluctuations, so the effect of power compensation can be evaluated by the number of voltage fluctuations, the number of voltage flickers, and the number of voltage resonances.

[0026] Please refer to Figure 2 , Figure 2 The present invention is a flowchart of obtaining a reactive compensation effect evaluation index and a harmonic suppression capability evaluation index of a performance evaluation method of a comprehensive power compensation system in some embodiments of the present application. According to an embodiment of the present invention, obtaining a reactive compensation effect evaluation index according to the reactive compensation effect data processing and obtaining a harmonic suppression capability evaluation index according to the harmonic suppression capability data processing include: S21, obtaining a reactive power compensation effect evaluation index according to the reactive power compensation power factor difference, reactive power reduction and line loss power processing; S22. Obtain a harmonic suppression capability evaluation index according to the current harmonic distortion rate, voltage harmonic distortion rate, harmonic suppression power factor difference and equipment action deviation data processing.

[0027] It should be noted that the reactive compensation effect evaluation index is obtained according to the reactive compensation power factor difference, reactive power reduction and line loss power processing, and the power quality evaluation index is obtained according to the reactive compensation effect evaluation index, harmonic suppression capability evaluation index and three-phase unbalanced regulation capability evaluation index processing; The calculation formula of the reactive power compensation effect evaluation index is: ; in, is the reactive power compensation effect evaluation index, , and They are the reactive power compensation power factor difference, reactive power reduction and line loss power, respectively. is a preset characteristic coefficient (which can be obtained by querying the preset power system performance detection platform database); The calculation formula of the harmonic suppression capability evaluation index is: ; in, is the harmonic suppression capability evaluation index, , , and They are current harmonic distortion rate, voltage harmonic distortion rate, harmonic suppression power factor difference and equipment action deviation data. It is a preset characteristic coefficient (which can be obtained by querying the preset power system performance detection platform database).

[0028] Please refer to Figure 3 , Figure 3 The present invention is a flowchart of obtaining a power quality evaluation index of a performance evaluation method of a comprehensive power compensation system in some embodiments of the present application. According to an embodiment of the present invention, the three-phase unbalanced regulation capability evaluation index is obtained according to the three-phase unbalanced regulation capability data processing, and the power quality evaluation index is obtained according to the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index processing, including: S31, obtaining a three-phase unbalance regulation capability evaluation index according to the three-phase voltage unbalance and the three-phase current unbalance; S32. Obtain a power quality evaluation index according to the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index.

[0029] It should be noted that the three-phase unbalance regulation capability evaluation index is obtained according to the three-phase voltage unbalance and the three-phase current unbalance, and the power quality evaluation index is obtained according to the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalance regulation capability evaluation index. The calculation formula of the three-phase unbalanced regulation capability evaluation index is: ; in, is the three-phase unbalanced regulation capability evaluation index, and They are the three-phase voltage unbalance and the three-phase current unbalance, and is a preset characteristic coefficient (which can be obtained by querying the preset power system performance detection platform database); The calculation formula of the power quality evaluation index is: ; in, is the power quality assessment index, is the reactive power compensation effect evaluation index, is the harmonic suppression capability evaluation index, is the three-phase unbalanced regulation capability evaluation index, , and is a preset weight coefficient (which can be obtained by querying the preset power system performance detection platform database).

[0030] According to an embodiment of the present invention, the step of obtaining a system operation stability evaluation factor according to system operation stability data processing includes: The system operation stability evaluation factor is obtained according to the voltage fluctuation times, voltage flicker times and voltage resonance times.

[0031] It should be noted that the system operation stability evaluation factor is obtained by processing the number of voltage fluctuations, the number of voltage flickers and the number of voltage resonances; The calculation formula of the system operation stability evaluation factor is: ; in, is the system operation stability evaluation factor, , and They are the number of voltage fluctuations, the number of voltage flickers and the number of voltage resonances. , and It is a preset characteristic coefficient (which can be obtained by querying the preset power system performance detection platform database).

[0032] According to an embodiment of the present invention, the obtaining of a system operation stability evaluation index according to the system operation stability evaluation factor and the fault detection data processing includes: A system operation stability evaluation index is obtained according to the system operation stability evaluation factor and the number of overvoltage faults and the number of overcurrent faults.

[0033] It should be noted that the system operation stability evaluation index is obtained according to the system operation stability evaluation factor and the overvoltage fault number and the overcurrent fault number; The calculation formula of the system operation stability evaluation index is: ; in, is the system operation stability evaluation index, and are the number of overvoltage faults and the number of overcurrent faults, respectively. and It is a preset characteristic coefficient (which can be obtained by querying the preset power system performance detection platform database).

[0034] According to an embodiment of the present invention, the processing of obtaining a system performance comprehensive evaluation index according to the power quality evaluation index and the system operation stability evaluation index, and performing qualification determination, includes: Inputting the power quality evaluation index and the system operation stability evaluation index into a preset system comprehensive performance evaluation model to obtain a system performance comprehensive evaluation index; The system performance comprehensive evaluation index is compared with a preset system performance comprehensive evaluation index threshold. If the threshold comparison result does not meet the preset threshold comparison result requirement, a determination is made that the system performance evaluation is unqualified.

[0035] It should be noted that the power quality evaluation index and the system operation stability evaluation index are input into a preset system comprehensive performance evaluation model to obtain a system performance comprehensive evaluation index; The calculation formula of the system comprehensive performance evaluation model is: ; in, is the comprehensive evaluation index of system performance, is the system operation stability evaluation index, is the power quality assessment index, and It is a preset characteristic coefficient (which can be obtained by querying the preset power system performance detection platform database).

[0036] The present invention also discloses a performance evaluation system for an electric power comprehensive compensation system, comprising a memory and a processor, wherein the memory stores a performance evaluation method program for the electric power comprehensive compensation system, and when the performance evaluation method program for the electric power comprehensive compensation system is executed by the processor, the following steps are implemented: Conduct performance tests on the comprehensive power compensation system to obtain test data, including reactive power compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data; According to the reactive power compensation effect data, a reactive power compensation effect evaluation index is obtained; according to the harmonic suppression ability data, a harmonic suppression ability evaluation index is obtained; According to the three-phase unbalanced regulation capability data, a three-phase unbalanced regulation capability evaluation index is obtained; according to the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index, a power quality evaluation index is obtained; Obtaining a system operation stability evaluation factor according to system operation stability data processing; Obtaining a system operation stability evaluation index according to the system operation stability evaluation factor and the fault detection data processing; The system performance comprehensive evaluation index is obtained according to the power quality evaluation index and the system operation stability evaluation index, and a qualification determination is performed.

[0037] It should be noted that the reactive compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data obtained by the performance test of the comprehensive power compensation system are processed to obtain the reactive compensation effect evaluation index, harmonic suppression capability evaluation index and three-phase unbalanced regulation capability evaluation index, and further processed to obtain the power quality evaluation index, and then the system operation stability evaluation factor is obtained according to the test data processing, and further processed to obtain the system operation stability evaluation index, and finally the system performance comprehensive evaluation index is obtained according to the power quality evaluation index and the system operation stability evaluation index, and the qualification is determined. Thus, the technology of comprehensive evaluation of the performance of the comprehensive power compensation system is realized, and the basis for the optimization and improvement of the comprehensive power compensation system is provided.

[0038] According to an embodiment of the present invention, the performance test of the comprehensive power compensation system is performed to obtain test data, including reactive power compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data, including: The reactive power compensation effect data includes reactive power compensation power factor difference, reactive power reduction and line loss power, and the harmonic suppression capability data includes current harmonic distortion rate, voltage harmonic distortion rate, harmonic suppression power factor difference and equipment action deviation data; The three-phase unbalanced regulation capability data includes the three-phase voltage unbalance degree and the three-phase current unbalance degree, and the system operation stability data includes the number of voltage fluctuations, the number of voltage flickers and the number of voltage resonances; The fault detection data includes the number of overvoltage faults and the number of overcurrent faults.

[0039] It should be noted that the power factor refers to the ratio of active power to apparent power in an AC circuit. In the absence of reactive power compensation, inductive loads (such as motors, transformers, etc.) will consume a large amount of inductive reactive power, which will reduce the power factor. After reactive power compensation, the power factor can be improved. The reactive compensation power factor difference indicates the power factor difference before and after reactive power compensation. The larger the difference, the better the reactive power compensation effect. The reactive power reduction refers to the difference in reactive power in the power grid before and after reactive power compensation measures are taken. The larger the reactive power reduction, the better the compensation effect. Reactive power compensation will reduce the line current, thereby reducing line losses. The line loss power can be expressed by the power difference between the beginning and the end of the line. The lower the line loss power after compensation, the better the reactive compensation effect.

[0040] The harmonic distortion rate of current and the harmonic distortion rate of voltage are important indicators for measuring harmonic content. The harmonic distortion rate of current refers to the percentage of the harmonic current root mean square value to the fundamental current root mean square value, which reflects the degree of distortion of the current waveform. The harmonic distortion rate of voltage refers to the percentage of the harmonic voltage root mean square value to the fundamental voltage root mean square value, which is used to measure the distortion of the voltage waveform. The lower the harmonic distortion rate of current and voltage, the less harmonic content in the power grid, and the better the harmonic suppression effect of the equipment. The difference in harmonic suppression power factor can be obtained by calculating the difference in power factor before and after harmonic compensation. The larger the difference in harmonic suppression power factor, the better the harmonic suppression effect. Power compensation can suppress voltage fluctuations, so the effect of power compensation can be evaluated by the number of voltage fluctuations, the number of voltage flickers, and the number of voltage resonances.

[0041] According to an embodiment of the present invention, the processing according to the reactive compensation effect data to obtain a reactive compensation effect evaluation index, and the processing according to the harmonic suppression capability data to obtain a harmonic suppression capability evaluation index include: Obtaining a reactive compensation effect evaluation index according to the reactive compensation power factor difference, reactive power reduction and line loss power processing; The harmonic suppression capability evaluation index is obtained by processing the current harmonic distortion rate, voltage harmonic distortion rate, harmonic suppression power factor difference and equipment action deviation data.

[0042] It should be noted that the reactive compensation effect evaluation index is obtained according to the reactive compensation power factor difference, reactive power reduction and line loss power processing, and the power quality evaluation index is obtained according to the reactive compensation effect evaluation index, harmonic suppression capability evaluation index and three-phase unbalanced regulation capability evaluation index processing; The calculation formula of the reactive power compensation effect evaluation index is: ; in, is the reactive power compensation effect evaluation index, , and They are the reactive power compensation power factor difference, reactive power reduction and line loss power, respectively. is a preset characteristic coefficient (which can be obtained by querying the preset power system performance detection platform database); The calculation formula of the harmonic suppression capability evaluation index is: ; in, is the harmonic suppression capability evaluation index, , , and They are current harmonic distortion rate, voltage harmonic distortion rate, harmonic suppression power factor difference and equipment action deviation data. It is a preset characteristic coefficient (which can be obtained by querying the preset power system performance detection platform database).

[0043] According to an embodiment of the present invention, the three-phase unbalanced regulation capability evaluation index is obtained according to the three-phase unbalanced regulation capability data processing, and the power quality evaluation index is obtained according to the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index processing, including: Obtaining a three-phase unbalance regulation capability evaluation index according to the three-phase voltage unbalance and the three-phase current unbalance; The power quality evaluation index is obtained by processing the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index.

[0044] It should be noted that the three-phase unbalance regulation capability evaluation index is obtained according to the three-phase voltage unbalance and the three-phase current unbalance, and the power quality evaluation index is obtained according to the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalance regulation capability evaluation index. The calculation formula of the three-phase unbalanced regulation capability evaluation index is: ; in, is the three-phase unbalanced regulation capability evaluation index, and They are the three-phase voltage unbalance and the three-phase current unbalance, and is a preset characteristic coefficient (which can be obtained by querying the preset power system performance detection platform database); The calculation formula of the power quality evaluation index is: ; in, is the power quality assessment index, is the reactive power compensation effect evaluation index, is the harmonic suppression capability evaluation index, is the three-phase unbalanced regulation capability evaluation index, , and is a preset weight coefficient (which can be obtained by querying the preset power system performance detection platform database).

[0045] According to an embodiment of the present invention, the step of obtaining a system operation stability evaluation factor according to system operation stability data processing includes: The system operation stability evaluation factor is obtained according to the voltage fluctuation times, voltage flicker times and voltage resonance times.

[0046] It should be noted that the system operation stability evaluation factor is obtained by processing the number of voltage fluctuations, the number of voltage flickers and the number of voltage resonances; The calculation formula of the system operation stability evaluation factor is: ; in, is the system operation stability evaluation factor, , and They are the number of voltage fluctuations, the number of voltage flickers and the number of voltage resonances. , and It is a preset characteristic coefficient (which can be obtained by querying the preset power system performance detection platform database).

[0047] According to an embodiment of the present invention, the obtaining of a system operation stability evaluation index according to the system operation stability evaluation factor and the fault detection data processing includes: A system operation stability evaluation index is obtained according to the system operation stability evaluation factor and the number of overvoltage faults and the number of overcurrent faults.

[0048] It should be noted that the system operation stability evaluation index is obtained according to the system operation stability evaluation factor and the overvoltage fault number and the overcurrent fault number; The calculation formula of the system operation stability evaluation index is: ; in, is the system operation stability evaluation index, and are the number of overvoltage faults and the number of overcurrent faults, respectively. and It is a preset characteristic coefficient (which can be obtained by querying the preset power system performance detection platform database).

[0049] According to an embodiment of the present invention, the processing of obtaining a system performance comprehensive evaluation index according to the power quality evaluation index and the system operation stability evaluation index, and performing qualification determination, includes: Inputting the power quality evaluation index and the system operation stability evaluation index into a preset system comprehensive performance evaluation model to obtain a system performance comprehensive evaluation index; The system performance comprehensive evaluation index is compared with a preset system performance comprehensive evaluation index threshold. If the threshold comparison result does not meet the preset threshold comparison result requirement, a determination is made that the system performance evaluation is unqualified.

[0050] It should be noted that the power quality evaluation index and the system operation stability evaluation index are input into a preset system comprehensive performance evaluation model to obtain a system performance comprehensive evaluation index; The calculation formula of the system comprehensive performance evaluation model is: ; in, is the comprehensive evaluation index of system performance, is the system operation stability evaluation index, is the power quality assessment index, and It is a preset characteristic coefficient (which can be obtained by querying the preset power system performance detection platform database).

[0051] A third aspect of the present invention provides a readable storage medium, which stores a performance evaluation method program for an integrated electric power compensation system. When the performance evaluation method program for an integrated electric power compensation system is executed by a processor, the steps of the performance evaluation method for an integrated electric power compensation system as described in any one of the above items are implemented.

[0052] The present invention discloses a performance evaluation method, system and medium for an integrated power compensation system, which quantitatively evaluates the performance of the integrated power compensation system in terms of reactive power compensation effect, harmonic suppression capability, three-phase unbalanced regulation capability, power quality, system operation stability, etc., to provide a basis for optimizing and improving the integrated power compensation system.

[0053] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0054] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0055] In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0056] Those skilled in the art can understand that: all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions, the aforementioned program can be stored in a readable storage medium, and when the program is executed, it executes the steps of the above method embodiments; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), disks or optical disks, and other media that can store program codes.

[0057] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention can be essentially or partly reflected in the form of a software product that contributes to the prior art. The software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

Claims

1. A performance evaluation method for a comprehensive power compensation system, characterized in that: The following steps are involved: Conduct performance tests on the comprehensive power compensation system to obtain test data, including reactive power compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data; According to the reactive power compensation effect data, a reactive power compensation effect evaluation index is obtained; according to the harmonic suppression ability data, a harmonic suppression ability evaluation index is obtained; According to the three-phase unbalanced regulation capability data, a three-phase unbalanced regulation capability evaluation index is obtained; according to the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index, a power quality evaluation index is obtained; Obtaining a system operation stability evaluation factor according to system operation stability data processing; Obtaining a system operation stability evaluation index according to the system operation stability evaluation factor and the fault detection data processing; The system performance comprehensive evaluation index is obtained according to the power quality evaluation index and the system operation stability evaluation index, and a qualification determination is performed.

2. The performance evaluation method of the comprehensive power compensation system according to claim 1 is characterized in that: The performance test of the comprehensive power compensation system is performed to obtain test data, including reactive power compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data, including: The reactive power compensation effect data includes reactive power compensation power factor difference, reactive power reduction and line loss power, and the harmonic suppression capability data includes current harmonic distortion rate, voltage harmonic distortion rate, harmonic suppression power factor difference and equipment action deviation data; The three-phase unbalanced regulation capability data includes the three-phase voltage unbalance degree and the three-phase current unbalance degree, and the system operation stability data includes the number of voltage fluctuations, the number of voltage flickers and the number of voltage resonances; The fault detection data includes the number of overvoltage faults and the number of overcurrent faults.

3. The performance evaluation method of the electric power comprehensive compensation system according to claim 2 is characterized in that: The step of obtaining a reactive compensation effect evaluation index according to the reactive compensation effect data processing and obtaining a harmonic suppression capability evaluation index according to the harmonic suppression capability data processing includes: Obtaining a reactive compensation effect evaluation index according to the reactive compensation power factor difference, reactive power reduction and line loss power processing; The harmonic suppression capability evaluation index is obtained by processing the current harmonic distortion rate, voltage harmonic distortion rate, harmonic suppression power factor difference and equipment action deviation data.

4. The performance evaluation method of the comprehensive power compensation system according to claim 3 is characterized in that: The method of obtaining a three-phase unbalanced regulation capability evaluation index according to the three-phase unbalanced regulation capability data processing, and obtaining a power quality evaluation index according to the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index processing includes: Obtaining a three-phase unbalance regulation capability evaluation index according to the three-phase voltage unbalance and the three-phase current unbalance; The power quality evaluation index is obtained by processing the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index.

5. The performance evaluation method of the electric power comprehensive compensation system according to claim 4 is characterized in that: The obtaining of the system operation stability evaluation factor according to the system operation stability data processing includes: The system operation stability evaluation factor is obtained according to the voltage fluctuation times, voltage flicker times and voltage resonance times.

6. The performance evaluation method of the electric power comprehensive compensation system according to claim 5 is characterized in that: The obtaining of a system operation stability evaluation index according to the system operation stability evaluation factor and the fault detection data processing includes: A system operation stability evaluation index is obtained according to the system operation stability evaluation factor and the number of overvoltage faults and the number of overcurrent faults.

7. The performance evaluation method of the comprehensive power compensation system according to claim 6 is characterized in that: The obtaining of a system performance comprehensive evaluation index according to the power quality evaluation index and the system operation stability evaluation index, and performing qualification determination, includes: Inputting the power quality evaluation index and the system operation stability evaluation index into a preset system comprehensive performance evaluation model to obtain a system performance comprehensive evaluation index; The system performance comprehensive evaluation index is compared with a preset system performance comprehensive evaluation index threshold. If the threshold comparison result does not meet the preset threshold comparison result requirement, a determination is made that the system performance evaluation is unqualified.

8. A performance evaluation system for a comprehensive power compensation system, characterized in that: The invention comprises a memory and a processor, wherein the memory stores a program of a performance evaluation method of an electric power comprehensive compensation system, and when the program of the performance evaluation method of the electric power comprehensive compensation system is executed by the processor, the following steps are implemented: Conduct performance tests on the comprehensive power compensation system to obtain test data, including reactive power compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data; According to the reactive power compensation effect data, a reactive power compensation effect evaluation index is obtained; according to the harmonic suppression ability data, a harmonic suppression ability evaluation index is obtained; According to the three-phase unbalanced regulation capability data, a three-phase unbalanced regulation capability evaluation index is obtained; according to the reactive power compensation effect evaluation index, the harmonic suppression capability evaluation index and the three-phase unbalanced regulation capability evaluation index, a power quality evaluation index is obtained; Obtaining a system operation stability evaluation factor according to system operation stability data processing; Obtaining a system operation stability evaluation index according to the system operation stability evaluation factor and the fault detection data processing; The system performance comprehensive evaluation index is obtained according to the power quality evaluation index and the system operation stability evaluation index, and a qualification determination is performed.

9. The performance evaluation system of the electric power comprehensive compensation system according to claim 8, characterized in that: The performance test of the comprehensive power compensation system is performed to obtain test data, including reactive power compensation effect data, harmonic suppression capability data, three-phase unbalanced regulation capability data, system operation stability data and fault detection data, including: The reactive power compensation effect data includes reactive power compensation power factor difference, reactive power reduction and line loss power, and the harmonic suppression capability data includes current harmonic distortion rate, voltage harmonic distortion rate, harmonic suppression power factor difference and equipment action deviation data; The three-phase unbalanced regulation capability data includes the three-phase voltage unbalance degree and the three-phase current unbalance degree, and the system operation stability data includes the number of voltage fluctuations, the number of voltage flickers and the number of voltage resonances; The fault detection data includes the number of overvoltage faults and the number of overcurrent faults.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a performance evaluation program for the integrated power compensation system. When the performance evaluation program for the integrated power compensation system is executed by a processor, the steps of the performance evaluation method for the integrated power compensation system as described in any one of claims 1 to 7 are implemented.

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