A Comprehensive Power Quality Weighting Method Based on The Operating Conditions of Disturbance Source Users

With the continuous development of industry in our country, the power system inevitably connects with more and more nonlinear interference source users. These users include new energy power plants, electrified railways, steel enterprises, chemical production enterprises, monocrystalline silicon production enterprises, etc., which cause an increase in sensitive and nonlinear loads that the power system has to bear. However, the past electric power quality cannot meet the normal operation of modern equipment, and the requirements for electric power quality from major electricity consumers far exceed those in the past. This article first provides a detailed introduction to the indicators used in traditional electric power quality evaluation. Then, based on the harmonic spectrum analysis of operating conditions data from a polycrystalline silicon enterprise, this article considers the comprehensive expert score by using the analytic hierarchy process. Subsequently, building on the traditional entropy weight method, this paper proposes an improved entropy weight determination method for comprehensive weighting of electric power quality. This method is more accurate in analyzing the electric power quality for different power grid interference source users.