An electric energy quality reference level evaluation method and system

A technology of power quality and reference level, applied in the field of power system, can solve the problems of inability to intuitively reflect the difference of power quality in different regions, low processing efficiency, etc., to reduce the amount of data processing, meet the requirements of the accuracy of evaluation results, and improve evaluation. The effect of efficiency

Active Publication Date: 2019-03-08
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a power quality benchmark level evaluation method to overcome the low processing efficiency o

Method used

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  • An electric energy quality reference level evaluation method and system
  • An electric energy quality reference level evaluation method and system
  • An electric energy quality reference level evaluation method and system

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Embodiment 1

[0029] An embodiment of the present invention provides a method for evaluating a power quality reference level, such as figure 1 As shown, the power quality benchmark level evaluation method includes:

[0030] Step S1: Obtain sampling data of each monitoring area of ​​the power grid system by using a stratified sampling method. In practical applications, the power grid system contains multiple monitoring areas. If the monitoring data of each monitoring area is processed, the amount of data processing will be greatly increased. Therefore, it is necessary to sample the monitoring data of each monitoring area.

[0031] Step S2: Calculate the characteristic values ​​of each preset power quality level index according to the sampled data. Specifically, in practical applications, the preset power quality level indicators include: voltage indicators, frequency indicators, total harmonic voltage distortion indicators, three-phase voltage unbalance indicators, and long-term flicker ind...

Embodiment 2

[0118] An embodiment of the present invention provides a power quality benchmark level evaluation system, such as Figure 5 As shown, the power quality benchmark level evaluation system includes:

[0119] The sampling data generating unit 1 is configured to acquire sampling data of each monitoring area by using a stratified sampling method according to the monitoring data of each monitoring area. For details, refer to the relevant description of step S1 in Embodiment 1.

[0120] The evaluation index calculation unit 2 is used to calculate the characteristic values ​​of each preset power quality level index according to the sampled data. For details, refer to the relevant description of step S2 in Embodiment 1.

[0121] The power quality level calculation unit 3 is used to calculate the power quality level value of the monitoring area by using the entropy weight method according to the characteristic values ​​of each preset power quality level index. For details, refer to th...

Embodiment 3

[0137] An embodiment of the present invention provides a non-transitory computer storage medium, the computer storage medium stores computer-executable instructions, and the computer-executable instructions can execute the power quality reference level evaluation method in any of the above-mentioned embodiment 1, wherein the above-mentioned storage The medium can be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a flash memory (Flash Memory), a hard disk (Hard DiskDrive, abbreviation: HDD) ) or a solid-state hard disk (Solid-State Drive, SSD), etc.; the storage medium may also include a combination of the above-mentioned types of memory.

[0138] Those skilled in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage med...

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Abstract

The invention provides an electric energy quality reference level evaluation method and system. The method comprises the following steps of acquiring sampling data of each monitoring area of a power grid system by adopting a stratified sampling method; according to the sampling data, calculating a characteristic value of each preset power quality level index; calculating the electric energy quality level value of the monitoring area by adopting an entropy weight method according to the characteristic value of each preset electric energy quality level index; generating an electric energy quality reference level value according to the electric energy quality level value of each monitoring area; and evaluating the electric energy quality of each monitoring area according to the electric energy quality reference level value and the electric energy quality level value of each monitoring area to generate an evaluation result. By implementing the method and the device, the evaluation standards are provided for the electric energy quality of different regions, the evaluation of the electric energy quality is realized, the accuracy of an evaluation result is ensured, the processing efficiency is improved, the difference of the electric energy quality levels of different regions can be intuitively reflected, and a basis is provided for making accurate electric energy quality level improvement measures.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a method and system for evaluating a power quality reference level. Background technique [0002] At present, with the increasing degree of interconnection among regional power grids in my country, the diversified development of power quality interference sources and the increasing nonlinear loads of power systems, the power quality problems of public power grids are becoming more and more prominent, and the power loads are becoming more and more complicated and diverse. More and more nonlinear, impulsive, and unbalanced loads are successively put into the power grid, which will affect the power quality of the distribution network to varying degrees. Coupled with imperfect monitoring methods, operation, external interference and various faults, power quality problems have become increasingly prominent. [0003] Most of the existing evaluation methods for power quality are b...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06393G06Q50/06Y02P90/82
Inventor 沈敏轩王同勋刘颖英
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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