simulation and analysis of uniform and non-uniform (longitudinal and fan-shaped) pollutions effect on the potential and electric field distribution of polymeric insulator using finite element method

Pollution is known as one of the important and effective factors on the performance of polymeric insulators. In practice, the deposit contamination on the insulator surface is not uniform completely and is non-uniform contamination. So far, comprehensive research has not been carried out on the effects of different forms of non-uniform contamination on the performance of the insulators. In this paper, the effect of uniform contamination, longitudinal non-uniform pollution and fan-shaped non-uniform pollution in three levels of light, medium and heavy contamination on the potential and electrical field distribution of a 20 kV polymeric insulator using Comsol Multiphysics software have been done and the results have been Analyzed. In longitudinal non-uniform pollution, the severity of pollution in the near of high voltage and ground electrodes regions is heavier than the middle region, and in fan-shaped non-uniform pollution, the severity of pollution in the leeward side region is heavier than the windward side region. The results show that in slightly uniform pollution, the electric field decreases and its amplitude increases with increasing the pollution intensity. In longitudinal non-uniform pollution, electrical potential is almost constant in the near of electrodes and the electric field intensity has been decreased. Also, in the fan-shaped non-uniform pollution, the electric field intensity has been increased in the leeward side region.