Abstract
The scientific evaluation of power quality is the basic condition for the treatment of electric energy pollution. In this paper, the relevant concepts and various indexes of power quality are analyzed based on the internal and external power quality standards. The evaluation method of power quality is divided into the specific analysis of single index evaluation and comprehensive evaluation. This paper proposes four evaluation methods of single index, including based on fuzzy mathematical single index evaluation method, based on fuzzy mathematics in various energy index commonly used membership function method, based on probability and statistics of the single index evaluation method and based on the main use of power grid planning, power grid construction and interference load before access to the simulation of the individual indicators to predict the assessment method. The weight selection method used in the comprehensive evaluation of power quality is analyzed from the subjective weight to the objective weight.
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