Analyzing and Modeling the Separation Distance of Lightning Arresters for 400kv Transfer Substation’s Protection against the Lightning Strokes

Abstract

This paper presents a study modification of separation distance of lightning arrester protecting a 400KV sub-station from lightning strokes related to the distance between the transformer and lightning arrester (the installation place of the lightning arrester ) a simple model was created in ATP and the distance between the arrester and transformer were varied.to ensure proper installation and to reduce the high lightning failure rate and to eliminate devastating impact, caused by lightning, the model e installation represents circuit composed of four towers . Program ATP-Draw (Alternative Transient Program) was used to simulate the problem. The simulation was done on three stages and the results were compared.