Surface electric field of insulator surface calculation considering the tower influence by FEM and CSM

Abstract

At present, the finite element method is mainly used to calculate the electric field on insulator surface. However, there are some problems in the setting of finite element simulation(FEM), which can lead to low computational efficiency. In this paper, the charge simulation method(CSM) is combined with FEM, and the subregion method is used to improve the efficiency of insulator electric field calculation. Firstly, the boundary potential distribution around the insulator in the whole simplified model is calculated by CSM, and then the surface electric field of the insulator is calculated by FEM, which can effectively compress the solution space. In this paper, the electric field distribution on the surface of the grading ring with different grid density is calculated, and the results are compared with those in other literatures. The method presented in this paper solves the problems of the large size difference of the model and the difficulty of grid generation in calculating the electric field on the insulator surface. Meanwhile, it also solves the problem of setting boundary conditions and improves the accuracy of the calculation results.