Insulation Design of Line and Equipment in Distribution Systems in Case of the Stroke of Direct Lightning Surge

직격뢰 침입시 배전계통에서 선로 및 기기의 절연설계

This paper examines the insulation coordination scheme of line and equipment in distribution system when the direct lightning surge strikes. The BIL that is applied in distribution system is not properly considered the performance and operation of arresters. Because of that, the high BIL is being used at partial system. This paper variously analyse the lightning overvoltage of line and equipment with earth of overhead grounding wire and installation types of arrester. Form these result, authors examine the rationality of BIL.