Flashover analysis in distribution system affected by lightning-induced voltage and ground potential rise

Abstract

This paper discusses flashover on a medium voltage line caused by nearby lightning. Simulations are carried out using analytical formulas for the lightning-induced voltage and the ground potential rise as a fundamental study. A flashover is determined using an integration method, which is a flashover model and can consider an influence of voltage waveform on the flashover. From the simulation results, the lightning overvoltages and the flashover on a medium voltage line are affected by the ground potential rise as the soil resistivity becomes higher.