提高接地极散流效率的冲击接地降阻分析

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Abstract Impulse resistance of simple configuration grounding device, which is significant for lightning performance of transmission lines, would reduce if current leakage efficiency of which is enhanced. Thereby, study on impulse resistance of grounding devices is carried out in order to improve current leakage efficiency. Impulse current leakage regulation as well as impulse resistance of 13 grounding devices are measured via impulse simulation experiment. Current leakage unhomogeneous degree of grounding devices are calculated by using computation formula of unhomogeneous degree which established in this paper. Impact of the “needle” length and location upon current leakage unhomogeneous degree as well as impulse grounding resistance are analyzed respectively. The results show that impulse current leakage become more unhomogeneous by adding needle shaped conductor to the proper location of grounding devices. Furthermore, impulse resistance of grounding devices are reduced. In addition, effect of resistance reduction is more obvious while needle shaped conductor is added at middle of the grounding device than other cases.

Key words： Grounding device impulse grounding simulation experiment unhomogeneous degree impulse grounding resistance end effect

Received: 08 November 2011 Published: 20 March 2014

PACS:

TM72

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	Articles by authors
	Yuan Tao
	Lei Chaoping
	Sima Wenxia
	Yang Qing
	Luo Ling
	Ai Linfeng

Cite this article:

Yuan Tao,Lei Chaoping,Sima Wenxia等. Analysis of Grounding Resistance Reduction Effect Based on Enhancing Impulse Current Leakage Efficiency[J]. Transactions of China Electrotechnical Society, 2012, 27(11): 278-284.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I11/278

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