2009•Power System TechnologyRequires access

Power Quality Comprehensive Evaluation Combining Subjective Weight With Objective Weight

Zhengyou He

Abstract

To improve the objectivity and rationality of power quality comprehensive evaluation,it is proposed to decide the weights of indices in power quality comprehensive evaluation by improved analytic hierarchy process(AHP),namely the subjective weight determining,and entropy weight method,namely the objective weight determining,therefore the defect of single weight determining is remedied and the decision of weights becomes more reasonable.On this basis,by use the combination of probability theory with fuzzy mathematics,the comprehensive evaluation of power quality is performed.Case analysis shows that the evaluation results by the proposed method are more rational and perfective,and conforms to reality.

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Key concepts: Analytic hierarchy process, Fuzzy logic, Entropy (arrow of time), Rationality, Mathematics, Reliability engineering, Power quality, Objectivity (philosophy)