Evaluación del impacto de ceniza volcánica en la rigidez dieléctrica de aisladores de suspensión en líneas de alto voltaje mediante análisis del factor de pérdida dieléctrica

Abstract

In this project, an experimental analysis of the involvement of volcanic ash on the ANSI 52-3 electrical insulators, generally used in 138 kV and 230 kV transmission lines, was carried out. For this purpose, ash samples from the Cotopaxi and Tungurahua volcanoes were used. The critical levels of accumulation of volcanic ash on the surface of the insulators were determined, with which there would be a high risk of failure. A methodology was also proposed to develop experimental tests in a high voltage laboratory, based on standards and procedures for tests on external insulators with contamination. A system of measurement and monitoring of electrical parameters was implemented, which together with the methodology proposed for the experimental development, allows us to obtain the results. Finally, the results obtained from the experimental tests carried out in the High Voltage Laboratory of the National Polytechnic School were presented, performing an analysis of them, and the transmission lines that would be affected in different scenarios and levels of volcanic ash contamination, were determined.