Basic Study on Flashover Characteristics of Power Lines by Forest Fire(I)

산불화재에 의한 전력선 섬락사고 기초연구(I)

The experiments were performed in model conductors under the application of ac and dc high-voltages. The results of an experimental investigation into the flashover characteristics of air dielectric strength in the presence of oil/gas flame are reported. It is demonstrated that flame can reduce by more than half, 80% in maximum the breakdown voltage of a model line. Taking a horizontal model line with a k=0.5, it can be seen from the results that the reduction of flashover levels, in comparison with the no-flame case, are 78.7[%] for h=0[cm], 59.6[%] for h=3[cm], 46.4[%] for h=6[cm], 40.4[%] for h=9[cm] and 23.2[%] for h=12[cm] when ac voltage is applied.