Research on Surface Electric Field Distribution Characteristics of Main Equipment Fittings in 750kV Substation

In order to effectively achieve corona control and precise noise reduction in various 750kV substations in the northwest region, this article conducts a study on the surface electric field distribution characteristics of the main equipment fittings of the 750kV substation. Through on-site investigation and observation of corona discharge conditions in multiple 750kV substations, a simulation calculation model for the surface electric field distribution characteristics of typical bay main equipment in 750kV substations was established. Select the three most severe moments of electric field distribution distortion in the 750kV substation, namely the peak voltage moment of A, B, and C three-phase operating values, and load the equipment in each phase according to the actual operating conditions to analyze the entire field electric field distribution of the 750kV substation. The results of this study can provide a theoretical research basis for solving the corona discharge problem of the main equipment in the 750kV substation.