Analysis of Conduction Ground Surface Current at Vertical Grounding Electrode in Grounded System

doi:10.11930/j.issn.1004-9649.2017.02.157.05

Abstract

Abstract: The vertical grounding electrode is an effective method to reduce grounding resistance. When grounding system drawings are missing or incorrect, it is important to detect vertical grounding electrode position accurately. According to ampere’s law, a method is proposed to locate vertical grounding electrode position by measuring conduction current of ground surface. Firstly, the conduction current distribution of vertical grounding grid and its connection branch is generated through the theoretical formula. Secondly, grounding grid model is constructed with and without vertical grounding electrode to simulate effect of vertical grounding electrodes on conduction current. Theoretical analysis and simulation model both indicate that vertical grounding electrode can be located effectively by measuring conduction current of ground surface. The detection method is simple, and can be used in further 3D imaging of grounded system structure.

Key words: grounding grid, vertical grounding electrode, conduction current, substation, detection

CLC Number:

TM863

XU Jialong, ZHU Liwei, WANG Xiaoyu, YAN Huajiang, YANG Fan, SHEN Xiaoming. Analysis of Conduction Ground Surface Current at Vertical Grounding Electrode in Grounded System[J]. Electric Power, 2017, 50(2): 157-161.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2017.02.157.05

https://www.electricpower.com.cn/EN/Y2017/V50/I2/157

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