Combined Weighted Correlation Analysis Based Power Quality Comprehensive Evaluation

Obtaining weights of the indexes is the basic calculation process of quantitative analysis method. Considering a single weight will lead to incomplete evaluation of power quality. In the paper, the combined weighting calculation method of subjective improved AHP and objective entropy method is used to determine the weight of each single index of power quality. It can reflect not only the experience of experts but also the actual situation of power quality indexes, and then grey correlation analysis is used to evaluate the overall regional power quality level. Simulation example shows that the method is simple and practical efficiency, and suitable for power quality analysis evaluation with multi-factors and multi-level management.