Power quality fuzzy evaluation method processed through improved empowerment algorithm

Abstract

The invention relates to a power quality fuzzy evaluation method processed through an improved empowerment algorithm. According to the method, first, normalization processing is performed on all indexes of power quality; appropriate indexes are selected for evaluation, wherein the indexes which are excellent all the time are not used for evaluation, and the indexes with index values smaller than 0.1 after normalization are removed; weight calculation is performed on the selected indexes, wherein an analytic hierarchy process (AHP) is adopted to perform subjective weight calculation, an improved entropy weight method is adopted to perform objective weight calculation, and then a subjective and objective composite weight is obtained through merging; the obtained composite weight is converted into a weight angle in a radar map, the area and perimeter of the radar map are obtained through calculation in combination with all single index values, and a comprehensive index evaluation value is obtained according to the area and perimeter of the radar map; and after a comprehensive index weight value is determined, the comprehensive index weight value is substituted into a membership function, and the fuzzy evaluation method is adopted to perform grading evaluation on the obtained indexes. By means of converting single indexes into a comprehensive index through an improved radar map method, comprehensive index processing is performed on power quality, and goodness and badness of the indexes can be displayed vividly.

Description

technical field [0001] The invention relates to a power quality evaluation method, in particular to a power quality fuzzy evaluation method processed by an improved weighting algorithm. Background technique [0002] As a commonly used energy source, electric energy is not only economical and practical but also easy to control and convert. The degree of energy application has become one of the important symbols of a country's development level. In recent years, with the continuous development of industrialization and national economic level, the whole society has more extensive application of electric energy, and the requirements for electric energy quality have gradually increased. The qualification of electric energy quality is directly related to the economic benefits of the entire electric power market. With the adjustment of the energy structure and the rapid development of the national economy, the long-distance direct current transmission and the interconnection of la...

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Problems solved by technology

[0005] The present invention aims at the problems that the selection of the existing power quality single index value has defects and the weighting means are not objective and perfect, and proposes a power quality fuzzy evaluation method processed by an improved weighting algorithm, which is used to solve the existing power quality problems. The problem of simplification of the model in which the quality is transformed from a single index to a comprehensive index

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