Development of a New Flashover Model for Lightning Surge Analysis

Abstract

This paper describes a new flashover model for lightning surge analysis. It is shown, at first, that starting conditions of leader propagation and leader propagation processes with the short tail light-ning impulse voltage waveform, which appears across the insulator strings on the transmission line by a lightning stroke, are clarified by experimental results. The new flashover model based on the experimental results is proposed in this paper. The proposed model consists of simple two equations, that give expression to the leader propagation processes, and can be realized very easily on the EMTP and other transient analysis programs. A comparison of results calculated by the proposed model with the experimental results shows good agreements.