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 resistor7 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.