Power quality data processing method and device based on intuitionistic fuzzy combination weighting

A power quality, intuition fuzzy technology, applied in electrical digital data processing, data processing applications, special data processing applications, etc., can solve problems such as the influence of human subjective factors

Pending Publication Date: 2021-12-10
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a power quality data processing method based on intuitionistic fuzzy combination weighting, which integrates subjective and objective weights to process and analyze the

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  • Power quality data processing method and device based on intuitionistic fuzzy combination weighting
  • Power quality data processing method and device based on intuitionistic fuzzy combination weighting
  • Power quality data processing method and device based on intuitionistic fuzzy combination weighting

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Embodiment 1

[0056]The invention proposes a power quality data processing method based on intuitionistic fuzzy combination weighting, uses intuitionistic fuzzy numbers to improve the classic ANP scaling method to calculate subjective weights, and combines the entropy weight method to combine the two weights with consistent subjective and objective weighting attributes. Then the gray clustering method of end-point mixed possibility function is used to deal with the uncertainty and fuzziness of the grade, and finally the comprehensive clustering coefficient is calculated by combining the index combination weight to obtain the power quality grade result.

[0057] The power quality data processing method based on intuitionistic fuzzy combination weighting of the present invention, see figure 1 shown, including the following process:

[0058] Step 1, comprehensive grade classification of power quality.

[0059] According to relevant national standards, the power quality is first divided into f...

Embodiment 2

[0114]In this embodiment, the actual on-line monitoring data of a substation 10kV bus power quality monitoring point within one year is used as the data basis for comprehensive data processing, and the monitoring data of the power quality monitoring point is obtained through a power monitoring terminal (wherein the power monitoring terminal is a prior art, It is not the invention point of this application, and will not be introduced in detail), to verify the feasibility and correctness of the gray clustering power quality data processing method based on intuitionistic fuzzy combination weighting. According to relevant national standards, the power quality is divided into four grades: high-quality Q1, good Q2, qualified Q3, and unqualified Q4. On this basis, combined with the power quality limits of different power quality grades, the grade boundaries of each index are divided, as shown in Table 2.

[0115] Table 2 Power quality index grade boundaries

[0116]

[0117] Coll...

Embodiment 3

[0143] Based on the same inventive concept as in Embodiment 1, a power quality data processing device based on intuitionistic fuzzy combination weighting of the present invention includes:

[0144] The data acquisition module is used to obtain the values ​​of various power quality evaluation indicators of selected power quality monitoring points by using the power monitoring terminal;

[0145] The subject-object weight processing module is used to calculate the subjective weight and objective weight of each power quality evaluation index based on the intuitionistic fuzzy number and the intuitionistic fuzzy analytic hierarchy process;

[0146] The subjective and objective weight coefficient processing module is used to calculate the subjective and objective weight coefficients according to the subjective and objective function planning model;

[0147] Combined weight processing module, used for calculating combined weight based on subjective and objective weights and subjective...

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Abstract

The invention relates to a power quality data processing method and device based on intuitionistic fuzzy combination weighting. The method comprises the following steps: acquiring various power quality evaluation index values; dividing comprehensive grades of electric energy quality; carrying out combined weighting based on intuitionistic fuzzy ANP; performing grey clustering processing based on an end point mixing possibility degree function; and determining an electric energy quality grade. According to the method, subjective weights are calculated by applying an intuitionistic fuzzy number to improve a classical ANP scaling method, and the two weights are combined with an entropy weight method in a manner that subjective and objective weighting attributes are consistent. Then, the uncertainty and fuzziness of the grade are processed by adopting a grey clustering method of an endpoint mixing possibility degree function; and finally, a comprehensive clustering coefficient is calculated by combining an index combination weight to obtain an electric energy quality result. Engineers are helped to correctly evaluate the electric energy quality level to a certain extent, theoretical guidance is provided for treating the electric energy quality problem, and the application value and prospect are huge.

Description

technical field [0001] The invention belongs to the technical field of power quality data processing, and in particular relates to a gray clustering power quality data processing method based on intuitionistic fuzzy combination weighting, and also relates to a gray clustering power quality data processing device based on intuitionistic fuzzy combination weighting. Background technique [0002] The extensive application of modern power electronic equipment and its high-precision instruments has made power users have higher and higher requirements for power quality. However, the extensive use of distributed power sources and nonlinear loads has made power quality pollution in the grid increasingly serious, and has aggravated the power quality. The contradiction between the supply and demand of the system and power users. Therefore, how to analyze and process based on power quality data to finally obtain power quality grades, reflect the overall status of power quality, and pro...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06K9/62G06Q10/06G06Q50/06G06F119/02
CPCG06F30/20G06Q10/06395G06Q50/06G06F2119/02G06F18/23Y02P90/82
Inventor 缪惠宇史明明刘建费骏韬袁晓冬张宸宇刘俊
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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