At present, finite element method is mainly used to calculate the surface electric field of insulators. However, there are some problems in the setting of finite element simulation, which may lead to low computational efficiency or inaccurate results. This paper presents a method to calculate the electric field on insulator surface, which can improve the efficiency of finite element calculation and the accuracy of calculation results.
First, tower and transmission line models were built by charge simulation method, and a closed area was set around the insulator to calculate the boundary potential distribution of the area. Then, the closed area was taken as the solution domain, and the surface electric field of the insulator was solved by COMSOL finite element simulation.
Solution space is reduced. The electric field distribution on insulator surface of tower with different voltage levels is calculated and the results are compared with those in other papers.
In this paper, the charge simulation method and finite element method are used to calculate the electric field on the surface of insulators, which solves the problem that the model size gap is large and the mesh generation is difficult when the finite element method is used to calculate the electric field on the insulator surface. At the same time, it also solves the problem of boundary condition setting and improves the accuracy of the calculation results.
 

Surface electric,insulator,Finite Element Method (FEM),Charge simulation method(CMS)