Analysis of the leakage current on polluted insulators using correlation coefficient

Flashover is damaging to the power transmission and distribution system. In this paper, correlation coefficient as a measure of nonlinearity is employed to analyze the leakage current signals generated from heavily polluted insulators for flashover prediction purpose. Data is generated with dry and wet conditions together with various supply voltages. By calculating the correlation coefficients between the supply voltages and the leakage currents, some patterns are found which may help identify the status of insulators.