Comprehensive fuzzy evaluation based on entropy weight method for insulator flashover pollution

Abstract

A comprehensive fuzzy evaluation model based on entropy weight method is proposed for insulator flashover pollution, for which, a fuzzy evaluation index system and its comment set are established to represent the insulator flashover conditions. The entropy weight method is applied to determine the weights of evaluation indexes and the combined triangular and semi-trapezoidal membership function is adopted to describe the ambiguity of each index. The steps of evaluation model establishment are emphatically studied and analyzed, including evaluation index selection, hierarchical division and weight determination. A case of 500 kV line insulator flashover is analyzed and the results coincide with the actual conditions, verifying the validity of the proposed method.