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This paper analyzes the performance of insulators subjected to pollution levels related to two topologies of 15 kV voltage class polymeric distribution isolators. A software was used to simulate the influence of various levels of pollution on the operation of insulators. Pollution layers with the variation of conductivity and permittivity parameters were modeled on the surface of the insulators and the electric potential, the electric field and the current density in the polymeric isolators were obtained by computer simulation. The results showed the increase of the electric potential distribution, the electric field and the current density of the insulators as the pollution intensity increases. The results proved that the topology with four sheds performs better in polluted conditions. Thus, it can be concluded that in long distribution lines different insulator topologies can be used, according to the region and microclimate that the insulators are exposed.

Análise comparativa do desempenho elétrico de isoladores tipo pino sob diferentes condições de poluição