摘要
Abstract
With the rapid development of the power grid control,power running state will continue to change,the line switch substation appear temporary opening of the case will more frequently,in order to prevent the switch equipment damage which caused by lightning total reflection in hot standby switch station,even the trip accident.In this paper,an explosion accident of 220 kV substation switching breaker which caused by lightning invasion wave is analyzed as an example,and through using the electromagnetic transient analysis software PSCAD,the impact of lightning invasion wave on the switch in stations is analyzed,and further analysis of the effect of the use of the outlet side of the lightning arresters is carried out.This paper analyzes show that,for substation lightning strikeprone,should the outlet end or outlet tower at first base every time the line breaker (recommended grounding resistor 7 Ω)installed at MOA arrester,can significantly improve the substation lightning invasion effect,for already installation line arrester substation,the line should be strengthened inspections and maintenance work arrester to prevent lightning in a long time and lose the protective effect of aging,so as to ensure the normal operation of the equipment in the substation.关键词
雷电侵入波/全反射/PSCAD/MOA避雷器Key words
lightning invasion wave/total reflection/PSCAD/MOA arrester
