Comprehensive Evaluation System of Voltage Sag Based on Combination of Improved Analytic Hierarchy Process and Entropy Weight Method

摘要

This paper presents a comprehensive evaluation system of voltage sag based on combination of improved analytic hierarchy process and entropy weight method. The two essential characteristic values, duration and sag amplitude are both taken into consideration. Appropriate weight coefficients calculated by the two methods are added to measure effect on voltage sag. The calculation results obtained by this evaluation system well correspond to actual severity of voltage sag.