2012•Power System TechnologyRequires access

Comprehensive Evaluation of Power Quality Based on Fuzzy Set Pair Analysis

XU Jia-zhu

Abstract

In the comprehensive evaluation of power quality,seven indices such as voltage deviation and so on are taken as the evaluation index system,then the experts decide the weights of indices by analytic hierarchy process(AHP).In view of the apparent influence of man-induced subjective factor during the weight decision by AHP,the grey relational analysis is applied to avoid the error in weight allocation due to disagreement expert opinions and make the evaluation process more reasonable.In allusion to the uncertainty in the comprehensive evaluation of power quality,the set pair analysis is introduced in;by means of composing a set pair of evaluation indices and criteria for evaluation,a fuzzy set pair analysis model for comprehensive evaluation of power quality is built.Evaluation results of a practical examples show that the fuzzy set pair analysis is effective in comprehensive evaluation of power quality.

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Key concepts: Analytic hierarchy process, Fuzzy logic, Set (abstract data type), Data mining, Quality (philosophy), Grey relational analysis, Reliability engineering, Computer science