瞬变电磁法视电阻率成像的接地网断点诊断方法

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Abstract This paper first proposes the transient electromagnetic method for point diagnosis of grounding grids in transformer substation to achieve nondestructive testing. When the pulse signals in transmitting coil ramp off suddenly, the induced signal in grounding grids can be detected. After apparent resistivity inversion and imaging, the break point fault can be diagnosed directly from the image. The Ansoft Maxwell software is involved to forward calculate the transient electromagnetic response signal in grounding grids. The differences between the apparent resistivity cross-section diagrams of grounding grid show that the method is feasible. The break point diagnosis experiment in transformer substation also demonstrates the effectiveness of this method. As a simple and efficient break point diagnosis method of grounding grids, it can be used in engineering practice.

Key words： Transient electromagnetic method apparent resistivity grounding grid break point diagnosis

Received: 08 October 2013 Published: 05 November 2014

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TM63

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	Articles by authors
	Fu Zhihong
	Yu Cigong
	Hou Xingzhe
	Zhang Huiqing
	Qin Shanqiang

Cite this article:

Fu Zhihong,Yu Cigong,Hou Xingzhe等. Transient Electromagnetic Apparent Resistivity Imaging for Break Point Diagnosis of Grounding Grids[J]. Transactions of China Electrotechnical Society, 2014, 29(9): 253-259.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I9/253

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