Electric field distribution analysis of 110 kV composite insulator using Finite Element Modeling

High voltage insulators are the inherent part of the power system. Among them composite insulators are essential for medium and high voltage applications. A factor which has a major influence on the electrical performance of composite insulator is an electric field distribution along their length and surface. In this paper, the electric field and the factors affecting the electric field distribution along the 110 kV silicone rubber composite insulators are discussed. This analysis has been performed by designing the 110 kV insulators with four different weather sheds. Then these insulator models are simulated under clean, uniformly polluted and dry band surface conditions. The maximum electric field and the region where it exists have been studied for all the surface conditions. Depends on the above investigation, the simulation results have been presented and examined for 110 kV composite insulators. Furthermore the heat generated and the spot where it occurs have been evaluated for all the surface conditions. The insulator configuration are modeled and analyzed by using Finite Element Method (FEM).