摘要
介绍了国外在分析特高压输电线路雷击跳闸原因时提出的一个新观点 ,即雷电击中档距中间部位的避雷线会引起避雷线—相导线间隙击穿放电 ,进而引起线路跳闸。采用避雷线负保护角并不能避免这种放电发生。提高避雷线保护的有效性可以通过减小避雷线—相导线间隙击穿概率来达到。
A new viewpoint put forward by foreign researchers about lightning trip out of UHV transmission lines is presented in this paper. The lightning trip out of UHV transmission lines is considered to be caused mainly by discharge of the gap between shielding wire and phase conductor while lightning strikes onto the shielding wire at mid span, and this kind of discharge cannot be avoided under negative shielding angles. Effective shielding can be achieved by reducing the breakdown probability of the gap between shielding wire and phase conductor.
出处
《电网技术》
EI
CSCD
北大核心
2000年第7期63-65,共3页
Power System Technology
关键词
特高压输电线路
雷击跳闸
避雷线
绝缘子
lightning trip out
lightning performance
UHV transmission line
