Optical Diagnostic Characterization of the Local Arc on Contaminated Insulation Surface at Low Pressure

Flashover of contaminated insulators is a major problem for power systems at high altitude. Laboratory experiments have shown that the optical diagnostic method can provide extensive information on physical process contamination flashover. In this paper, study local arc wet polluted surface under low pressure by using presented. The thickness continuous spectrum, spectral line intensity and composition varies significantly in different stages development. Thermodynamic parameters (including electron temperature, density conductivity) are obtained analyzing spectra. Both temperature conductivity increase with leakage current air pressure. Although does not change an current, it increases findings work could be used as supplementary investigation parameters, thus providing reliable reference calculation flashover