A New Method for Power Quality Comprehensive Evaluation Considering the Analysis of Sequence Stability

In the comprehensive evaluation of power quality,the experts determine the weight of every indicator by using analytic hierarchy process.Considering the non-uniform weight distribution errors caused by evaluation differences among experts,the entropy method was applied to get the importance of every expert when they determine the weights of power quality indicators in this paper.Accordingly,obtained the final weight of every indicator.Then,In allusion to the uncertainty in the comprehensive evaluation of power quality.the connection degree is applied to deal with the uncertainties of the comprehensive evaluation of power quality.Compare the values of the assessment indicators and criteria value.A model for the comprehensive evaluation of power quality based on connection degree was established.The index of uncertainty grade discrepancy in connection degree is an uncertain interval value and study on it.The analysis of sequence stability was conducted for the sorted result of power quality.So a more accurate and comprehensive power quality assessment method was provided.