Breakage Mechanism Study of Overhead Ground Wire Under Lighting Stroke Based On Finite Element Analysis

Breakage of overhead transmission lines and distribution will lead to severe power outage problems, clarifying the breakage mechanism is great importance value for reliability stability system. Taking ground wire example, this paper presents its study under lighting stoke based on finite element analysis. A multi-physics analysis model built first, which includes contact points. The current density temperature rise impact short circuit are analysed, resistance effect proved primary cause breakage. Then some major factors that influence in turn discussed. Based discussions, valuable suggestions given protection lines.