Numerical simulation and experiment research of laser damage of porcelain insulator surface

During the process of laser de-icing applied in the electric grid, the electrical equipment such as insulator should not be damaged by the laser. The temperature and stress field distributions of normal porcelain, alumina porcelain, zirconium oxide porcelain and cordierite porcelain after laser irradiating are obtained by using ANSYS software. The results show that alumina porcelain has advantages in characteristics of anti-damage of thermal induced stress. The experiments of surface damage of insulator with Nd:YAG laser irradiation are explored. The relations between surface temperature and irradiating time are obtained. So is the damage form. Numerical analysis and experiment results are both show that laser power density and irradiating time are considered as the important influence factors of laser damage of the insulator. Thermal damage and thermal-stress damage are the main types of laser damage of porcelain insulator, which are related to the surface temperature after laser irradiation. The anti-damage methods of aiming and controlling, combining laser de-icing with other de-icing methods to protect the insulator are also proposed.