The traditional methods for evaluation of electric energy quality can not reflect the distribution feature

and they also can not be used to assess the distributed photovoltaic power quality. In order to solve this problem

the subjective weight and objective weight methods are conducted in the comprehensive comparison

and the entropy method is proposed to empower. Then the improved AHP and indicators polarization processing are introduced to improve the entropy method. The evaluation system covering three aspects of input

process and output is established

and the improved entropy weight method is used to assessment. Example shows that the improved entropy weight method can better reflect the distribution feature

can more fully utilize the measured data

and can provide reference for power quality assessment of distributed photovoltaic.