Analysis of Leakage Current on Polluted Polymeric Insulator Using Finite Element Method

Reinaldo Corrêa Leite; Filipe M. do Rosário Menezes; Kalil Lucas da Silva Corrêa

doi:10.20906/sbse.v2i1.3045

Reinaldo Corrêa Leite UFPA - Universidade Federal do Pará, Belém
Filipe M. do Rosário Menezes UFPA - Universidade Federal do Pará, Belém
Kalil Lucas da Silva Corrêa UFPA - Universidade Federal do Pará, Belém

DOI: https://doi.org/10.20906/sbse.v2i1.3045

Keywords: Insulator, High Voltage, Leakage Current, Simulation, Finite Element Method

Abstract

This paper develops a Finite Element Model (FEM) for a 138 kV High Temperature Vulcanized (HTV) Silicone Rubber (SiR) transmission insulator in which, in a first step, leakage current is calculated for different non-uniform continuous and discontinuous pollution deposits and then features based on the phase shift between the leakage current and the applied voltage are extracted for each kind of pollution layer to identify the existence of dry bands on the insulator surface. A phase shift of 84.75° lag between the leakage current and applied voltage was found for a pollution layer with dry bands inserted. This results evidence that the phase angle can be used to detect the dry band formation by measuring the leakage current and its phase angle.