Finite Element Modeling of Voltage and Electric Field Distribution along the Insulators

Insulator strings are often used for two purposes in electrical systems to support the live phase conductors of the support tower, which are mechanically and electronically alienated. However, the dissemination of the potential of the electric field and the insulator row is uneven, which can easily cause a corona effect, the deterioration of the surface of the insulator and even a bypass. Therefore, the calculation of the field strength and the voltage distribution is a very significant factor for the operating time. The field strength dissemination can be estimated and evaluated by means of numerical techniques such as Boundary Element Method (BEM), Charge Simulation Method (CSM), Finite Difference Method (FDM) and Finite Element Method (FEM). The FEM is most practical for an area where there are many dielectrics, heterogeneous and nonlinear materials, complex composite fields, and a field of distributed space charges and singular points. This document proposes the Finite Element Model (FEM) to calculate the potential strength distribution and the electric field at the insulator.