摘要
500 k V伊穆直流输电系统接地极线路导线发生绝缘子炸裂、导线落地事故,由于接地极线路招弧角放电间隙过小,导致直流系统在操作过电压作用下产生燃弧现象。直流系统无法熄弧是造成事故的主要原因,对此提出了加大招弧角放电间隙、调整接地极线路绝缘配置等防范措施。
According to the 500 kV Gimo HVDC ground electrode insulator, conductor ground crack fault, analysis of grounding line arcing horn discharge gap which was too small in the operating over voltage under the effect of arc, DC system couldn＇t extinguish the arc, which was the main cause of the ground wire insulator crack, then put forward preventive measures to increase the arcing horn discharge gap, adjusting the ends of the earth line insulation configuration and other means.
出处
《内蒙古电力技术》
2014年第6期111-113,共3页
Inner Mongolia Electric Power
关键词
直流输电系统
接地极线路导线
燃弧
招弧角
放电间隙
绝缘配置
DC transmission system
grounding line conductor
arcing
trick arc angle
discharge gap
insulation configuration
