Estudio de la influencia de la altitud en el nivel aislamiento eléctrico de líneas de 138 kv y 230 kv debido a la reducción de la presión atmosférica

Abstract

This project focuses on how high altitudes affect the insulation level of the overhead transmission lines of 138 kV and 230 kV. It only considers air pressures in insulation derating other variables are not considered such as temperature, humidity or pollution. Discharges in gases, associated phenomena and their involvement in overhead transmission lines are studied. International technical standards and other studies are reviewed in the field of insulation derating with altitude. Using Weibull probability functions, three high altitude correction factors are tested for an insulator string and "M" parallel insulator strings when an overvoltage appears on overhead line. At 3000m, Pomasqui-Santa Rosa 230kV overhead line, different numbers of insulator are determined in string with each correction factor.