摘要
通过对福建某山区110 kV输电线路复合绝缘子的雷击闪络事故进行调研分析,总结复合绝缘子遭雷击闪络的原因主要有:干弧距离太短、均压环单端配置以及接地电阻超标。提出了在山区雷电多发地段使用加长型的合成绝缘子、安装双均压环以及降低杆塔接地电阻的防雷击闪络措施,实践证明该措施对防止复合绝缘子的雷击闪络起到了很好的效果。
After an analysis on the lightning flashover accidents of the composite insulators in 110kA transmission lines in a Fujian mountainous area, the main causes of the lightning strike on the composite insulators were summarized, which included shorter dry-arc distance, single-end arrangement of grading ring and the over-standard of grounding resistance. The measures to prevent the insulators from lightning flashover were proposed in which lengthening composite insulators were applied, double-end of grading rings were installed and the grounding resistance was reduced. The measures prove to be an effective way.
出处
《绝缘材料》
CAS
2008年第4期46-48,共3页
Insulating Materials
关键词
复合绝缘子
雷击闪络
均压环
接地电阻
composite insulator
lightning flashover
grading ring
grounding resistance
