Numeral analysis model for shielding failure of transmission line under lightning stroke

被引:82
|
作者
He, JL [1 ]
Tu, YP
Zeng, R
Lee, JB
Chang, SH
Guan, ZC
机构
[1] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
[2] N China Elect Power Univ Beijing, Dept Elect Engn, Beijing 102206, Peoples R China
[3] Korea Electrotechnol Res Inst, Elect Environm & Transmiss Grp, Chang Won 641600, South Korea
关键词
critical breakdown electrical field; electrical field; electrogeometric model; lightning leader; numerical analysis model; shielding failure; transmission line;
D O I
10.1109/TPWRD.2004.839189
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The shielding failure is the occurrence of a lightning stroke that bypasses the overhead ground wires and terminates on the phase conductors. The correct design to improve the shielding effect of transmission line to lightning is one of the key problems of transmission line design. A numerical analysis model for shielding failure of transmission line based on electromagnetic field theory is proposed in this paper. The electrical field of the system including lightning leader, transmission line and ground is solved, the range of lightning current striking the phase conductor is obtained, and the shielding failure probability of transmission line is calculated. The lightning leader model and the critical breakdown electrical field intensity of long gap are discussed. The analyzed results by numerical analysis model are compared with those by the electro-geometric model.
引用
收藏
页码:815 / 822
页数:8
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