Análise do comportamento espectral de isoladores em linhas de transmissão.

Abstract

The proper functioning of transmission lines insulation system is of utmost importance for the continuity of power supply. This insulation in power systems is basically composed of electrical insulators. Spread over an extensive geographical area, methods and inspection procedures become difficult to perform because of its dependency on the visual assessment of the technician and specific climatically conditions. It is necessary to study an efficient method to assists when to perform a cleaning or replacement of a chain of polluted or defective insulators. This paper presents an analysis conducted through computer simulations of insulator's radiated spectrum, by verifying if one can distinguish and classify insulators according to their level of pollution. The results of the analysis’ shown that not only insulators with different pollution levels has different spectra, but also that it is possible to use a classification method based on the comparison of the reflection coefficient of each polluted insulator.