短导体对水平接地极冲击特性的影响

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Abstract The existing engineering application of practical and impact grounding test research show that the radial horizontal grounding electrode on the proper position after adding short conductors can make time-varying electric field tended to distribute more evenly around the grounding body. The paper hereby is aimed at the arrangement of short conductor using the skill of difference time domain method and multiple physical field direct coupling analysis software (COMSOL). The single horizontal grounding electrode and grounding electrodes adding short conductors are the research objects. This paper analyzes the influence of the impact characteristic of seven kinds of grounding electrodes from the view of current shielding effect. The results show that the short conductor arrangement exist weak shielding area in a specific horizontal grounding electrode and outside the weak shielding area short conductors are greatly influenced by end effect. The shielding effect increases with the increase of injection current amplitude for the same structure. In the cases of the short conductor length and horizontal grounding electrode length ratio of 1/30, the proportion of central diffuser value of grounding electrode is bigger and shielding effect is weaker than that of other structure when adjacent short conductors spacing and horizontal grounding electrode length ratio between 10%~15%.

Key words： Short conductor grounding electrodes impact characteristics current shielding effect difference time domain finite element method.

Received: 29 April 2013 Published: 23 March 2015

PACS:

TM761.1

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	Articles by authors
	Yuan Tao
	Tang Yan
	Sima Wenxia
	Yang Qing
	Jiang Wendong
	Cao Jiong

Cite this article:

Yuan Tao,Tang Yan,Sima Wenxia等. Simulation Analysis of the Impact Characteristic of Grounding Electrode Based on the Current Shielding Effect[J]. Transactions of China Electrotechnical Society, 2015, 30(1): 177-185.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I1/177

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