Classification of the polymeric insulators degradation conditions by UV radiation levels (corona) and Fuzzy Logic

The insulation of electric power transmission systems is made predominantly using electrical insulators. Electrical insulator failures have undesirable consequences, being the main cause of transmission line outages. In its operational environment, high voltage outdoor insulators are submitted to severe conditions. The increase in electric field strength causes surface discharges (corona) or partial discharges, internal to the insulators; and atmospheric conditions, such as air-density and humidity, affect corona generation. Corona produces ultraviolet light, heat and a gaseous by products (ozone, NO2). Corona in the presence of water generates nitric acid which may cause surface deterioration. Electrical utility companies are constantly seeking predictive techniques that indicate the…