Análise do efeito corona em uma cadeia de isoladores de vidro de 69kV utilizando simulação computacional e ensaios experimentais.

Abstract

The majority electrical systems disconnections are caused by failures in isolators, which in most cases are related to partial discharges of the corona type. The occurrence of the corona phenomenon in transmission lines means charge losses, electromagnetic interference and material wear, besides other damages. There is a growing concern among researchers about the behavior of insulators. The high voltage tests that characterize the insulators under the corona effect can be costly or not always feasible. Therefore, this work presents an analysis of the electric field distribution along six of 69 kV insulators, using simulation, compared to a quantification of photons obtained by measures of a ultraviolet emission camera, at experimental tests. The main goal is representing corona effect in a computational environment. In addition, an equation is proposed that relates the number of photons and the electric field.