Abstract
Flashover due to pollution of overhead transmission line insulators (OHTL) is a major source of faults in the electric power transmission system. Insulators are exposed to the outdoor environment and become polluted by different types of pollutants that end up causing faults, like flashover in the transmission of electric power. In this paper, the investigation of the potential distribution efficiency of polluted 132kV AC transmission line insulators was conducted. MATLAB was used to model and simulate the polluted insulators and comparison was made between not polluted and polluted insulators. Due to pollution of the OHTL, the potential distribution on a string of suspension insulators became non uniform leading to a decrease in efficiency. The results show that the value of a capacitance K ratio increases from 0.2 to 1.0 which led to an efficiency decrease from 99.9% to 31.07%.
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