Impedance characteristics of grounding electrodes on earth surface

被引：13

作者：

Ametani, Akihiro ^{[1
]}

Chikaraa, Tomohiro ^{[1
]}

Morii, Hiroshi ^{[2
]}

Kubo, Takashi ^{[2
]}

机构：

[1] Doshisha Univ, Kyoto 6100321, Japan

[2] Kansai Elect Power Co, Amagasaki, Hyogo 6610974, Japan

来源：

ELECTRIC POWER SYSTEMS RESEARCH | 2012年 / 85卷

关键词：

Earth-surface electrode; Grounding resistance; Transient impedance; FDTD;

D O I：

10.1016/j.epsr.2011.07.006

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：

This paper deals with the comparison of impedance characteristics of grounding electrodes on earth surface and those that are buried underground. The impedance characteristics are investigated analytically, experimentally and numerically. It has been found that there exists no significant difference of a transient resistance between a grounding electrode on the earth surface and a conventional buried electrode, when the electrode length is greater than some 10m. The result agrees with that evaluated by well-known Sunde's formula for a steady-state resistance of a grounding electrode. The observation suggests that a grounding electrode does not necessarily need to be buried at a large depth, but can be laid on the earth surface covered by soils in a place where the touch and step voltages are not significant. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：38 / 43

页数：6

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