Lightning impulse performances of grounding grids for substations considering soil ionization

被引：59
|
作者：
Zeng, Rong [1 ]
Gong, Xuehai [2 ]
He, Jinliang [1 ]
Zhang, Bo [1 ]
Gao, Yanqing [3 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, State Key Lab Power Syst, Beijing 100084, Peoples R China
[2] N China Elect Power Res Inst, Beijing 100045, Peoples R China
[3] Beijing Int Elect Power Dev & Investment Co, Beijing 100037, Peoples R China
来源：
IEEE TRANSACTIONS ON POWER DELIVERY | 2008年 / 23卷 / 02期
基金：
中国国家自然科学基金;
关键词：
grounding grid; lightning impulse; soil ionization; transient characteristic;
D O I：
10.1109/TPWRD.2007.915194
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：
When lightning strikes a substation or a transmission tower near the substation, high current generated by the stroke would flow into the grounding grid of the substation and dissipate in the soil. The transient characteristic of the grounding grid is very important to the safe and reliable operation of the power system. A circuit model with a lumped time-variable parameter is proposed to calculate the transient characteristics of a grounding grid under lightning current. The ionization phenomena around the ground conductors in the soil are simulated by means of time-variable parameters under appropriate conditions. The influences of different parameters on the transient characteristics of the grounding grid subjected to lightning impulse current are analyzed and the effective usage area of the grounding grid under lightning is discussed.
引用
收藏
页码：667 / 675
页数：9
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