Abstract
The quality of power quality affects the security and stability of power grid, so it is necessary to study the evaluation method of power quality. In this paper, a fuzzy evaluation method of power quality based on improved critic and AHP is proposed by combining the improved critic evaluation method, analytic hierarchy process (AHP) and fuzzy mathematics. This method first calculates the subjective weight of each index vector by AHP, then calculates the objective weight according to the improved critic method, and then obtains the final comprehensive weight by the two. Finally, the fuzzy mathematics method is used to evaluate the power quality and the results are obtained. The example shows that this method can describe the power quality level accurately and objectively.
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