Design and simulation of 400kV surge arrester using Comsol software

Surge arresters are used to protect electrical systems against switchgear and atmospheric surges. The electric field distribution in high voltage capacitor and surge arrester bushings is principally dependent on the geometry size and types of the materials used. Leakage current is known to be directly related to the degree of degradation of arrester. Leakage current is commonly flow across arrester under non-conducting condition. In this work, a two-dimensional (2D) axial-symmetrical 400kV surge arrester model was developed and used to simulate the leakage current under normal condition. Tests based on IEC standards werecomputationally simulated using COMSOL Multiphysics®,which is based on Finite Elements Method. The simulation results show that the leakage current is more affected by the size of ZnO and the material Housing. From this paper, an understanding on the leakage current behaviors in a ZnO surge arrester can be enhanced. This study may also help improve the design of incremental displacements in reducing leakage current.

کلیدواژه ها:

Zinc oxide surge arrester ، Finite element method ، Leakage current ، Electric Field distribution