摘要
当750kV线路进线保护段内单项导线遭受雷击时,在断开的进线开关触头间产生的暂态过电压对进线开关的安全造成了很大的威胁。笔者对比研究了进线开关在有无MOA保护、不同MOA保护位置及不同雷击点时的触头间的过电压。计算结果表明,额定电压为600kV的金属氧化物避雷器能有效地保护进线开关。
The transient overvoltage across Switch contactors arising when the lightning strokes the 750kV line input is the severe threat to switch.The overvoltage across switch contactors is calculated in consideration of different protective sites of metal oxide arrestre(MOA),the variety of lightning stroke location and the condition whether the switch is protected by the MOA.The result of computation indicates that the switch in 750kV transmission line can work normally under the protection of the MOA at a rated voltage 600kV.
出处
《电瓷避雷器》
CAS
北大核心
2003年第4期36-39,共4页
Insulators and Surge Arresters
关键词
进线保护段
开关触头间暂态过电压
绝缘子闪络电压
MOA
EMTP
line input
transient over-voltage between switch contactors
the flashover voltage of the insulator
MOA
EMTP
