摘要
根据新杭线 回线雷电流幅值的实测结果 ,分析了该线从 196 1年投运至 1994年的 34年间的 5 5次雷击闪络跳闸和6 9次雷击闪络的类型 ,从而得到该线路的实际雷击跳闸率并与 SDJ7- 79规程计算值作了比较。此外 ,还对新杭线 、 回线同年份的雷击跳闸率作了计算与比较。
kV Xinghang No. 1 transmission line was put to use in 1961. Up to 1994 there are 55 lightning trip outs and 69 lightning flashovers on this line in all. In this paper according to the practical measurement of the lightning current magnitude the lightning trip outs are analyzed and the lightning flashove rs are classified into shielding failures and back flashover failures. Then the practical lightning trip out rate is obtained and compared with that calculated by SDJ7 97 code. Otherwise, the annual lightning trip out rates of Xinghang No. 1 and No. 2 transmission lines are calculated respectively and compared.
出处
《电网技术》
EI
CSCD
北大核心
2001年第2期61-68,68,共9页
Power System Technology
关键词
输电线路
防雷
雷击闪络
跳闸分析
雷电流幅值
lightning current amplitude
shielding failure
back stroke
detour stroke rate
lightning trip out rate
