The Method for Evaluating the Reclosing Time of Reclosure Based on Lightning Parameters

Abstract

The fault of transmission line is mostly caused by lightning, and a ground lightning stroke process is often accompanied by multiple strokes. The duration of ground lightning stroke are also different. In this paper, a method for evaluating the reclosing time of reclosure based on lightning parameters is proposed. In addition, this paper also gives an expression for the cumulative rate of the duration of ground lightning stroke, and an expression for probability distribution of the amplitude of lightning current in Guangdong area. We also proposed a method for calculating the probability of tripping of reclosure. By this calculating method, the average probability of tripping of reclosure is less than 1/10000 during a ground lightning stroke process, when the reclosing time t0 is greater than 1.012s.