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Investigation of Lightning Rod Shielding Angle

刊名：	電気学会論文誌
作者：	Mohamed Nayel（Electrical and Electronics Engineering Department, Xian Jiaotong Liverpool University）
刊号：	730D0087-B
ISSN：	0385-4213
出版年：	2011
年卷期：	2011, vol.131, no.10
页码：	855-858
总页数：	4
分类号：	TM7
关键词：	Lightning rod；Lightning leader；Attractive radius；Charge simulation method；Electromagnetic
参考中译：
语种：	eng
文摘：	This paper studies those parameters affecting the shielding angle of the lightning rod (Franklin Rod) above very tall buildings. It was recommended that the shielding angle of the lightning rod is about 45° ～ 60°. The downward lightning leader is modeled by using discrete line charges to consider the exponential distribution of charges through the downward leader. The voltage condition used by Rizk is used to investigate the inception of the upward lightning leader. Different air conditions (relative air density and air humidity) are considered for more practical simulation. The influences of lightning parameters and lightning rod height on the shielding angle are studied. The results shows that, lightning leader parameters, lightning rod height and ground slope have series effects on the lightning rod shielding angle. Based on the results, a lightning rod shielding angle for shielding design is recommended to decrease the lightning stroke to the lightning rod.