Comprehensive Evaluation of Power Quality Based on Improved TOPSIS Method and Combination Weights

In order to fully consider the influence of each power quality evaluation index, a comprehensive evaluation method of power quality based on improved TOPSIS method and combination weights is proposed. Firstly, the objective weight and subjective weight of each indicator are determined respectively by using CRITIC weighting method and the improved Analytic Hierarchy Process (AHP). Secondly, a virtual negative ideal solution is constructed and the traditional Euclidean distance is replaced by the weighted distance and the improved distance to calculate the closeness in TOPSIS (Approaching Ideal Solution Distance Method) model. Finally, an example analysis is carried out through the measured data of a monitoring point in a certain place. The evaluation results show that this method can comprehensively consider the information of each evaluation index, and conduct a reasonable and accurate hierarchical and quantitative evaluation of power quality, which verifies the reliability and feasibility of the evaluation method proposed in this paper.