Abstract：Aiming at the problem of power quality deterioration caused by a large number of high-permeability

distributed generation connected to the distribution network，a power quality assessment method based on

combination weights and vlsekriterijumska optimizacija i kompromisno resenje（VIKOR）method was proposed.

Firstly，according to the existing standards and the actual engineering situation，a comprehensive evaluation system of power quality was established from three dimensions：amplitude quality，waveform quality and frequency quality.Secondly，considering the defects of the traditional nine-demarcation analytic hierarchy process（AHP）method，the three-demarcation was used to improve the AHP method to obtain the subjective weight. In order to avoid the shortcomings of the single weighting method，the objective weight was obtained by combining the entropy value in the entropy weight method with the amount of information in the criteria importance though intercrieria correlation （CRITIC）method. This method considered the degree of dispersion，correlation and contrast between the indicators，and the subjective and objective weights were combined by the Lagrange multiplier method. Then，the VIKOR method was used to obtain the comprehensive evaluation value of each power quality index and sort its merits and demerits. Finally，the power quality index data collected by five monitoring points in a certain area were used for case analysis and compared with other evaluation methods to verify the feasibility of the proposed method.

      Key words：combination weights；improved analytic hierarchy process（AHP）method；entropy weight method（EWM）；criteria importance though intercrieria correlation（CRITIC）method；vlsekriterijumska optimizacija ikompromisno resenje（VIKOR）method；comprehensive evaluation