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Open AccessArticle

Detecting Grounding Grid Orientation: Transient Electromagnetic Approach

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Department of Electrical and Computer Engineering, COMSATS University Islamabad, Wah Campus, Wah 47040, Pakistan
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Department of High Voltage and Insulation Technology, Chongqing University, Chongqing 400044, China
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College of Computer Science and Engineering, University of Ha’il, Ha’il 2440, Saudi Arabia
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(24), 5270; https://doi.org/10.3390/app9245270
Received: 7 November 2019 / Revised: 29 November 2019 / Accepted: 2 December 2019 / Published: 4 December 2019
The configuration is essential to diagnose the status of the grounding grid, but the orientation of the unknown grounding grid is ultimately required to diagnose its configuration explicitly. This paper presents a transient electromagnetic method (TEM) to determine grounding grid orientation without excavation. Unlike the existing pathological solutions, TEM does not enhance the surrounding electromagnetic environment. A secondary magnetic field as a consequence of induced eddy currents is subjected to inversion calculation. The orientation of the grounding grid is diagnosed from the equivalent resistivity distribution against the circle perimeter. High equivalent resistivity at a point on the circle implies the grounding grid conductor and vice versa. Furthermore, various mesh configurations including the presence of a diagonal branch and unequal mesh spacing are taken into account. Simulations are performed using COMSOL Multiphysics and MATLAB to verify the usefulness of the proposed method. View Full-Text
Keywords: grounding grid; magnetic field; orientation; transient electromagnetic method (TEM) grounding grid; magnetic field; orientation; transient electromagnetic method (TEM)
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MDPI and ACS Style

Qamar, A.; Ul Haq, I.; Alhaisoni, M.; Qadri, N.N. Detecting Grounding Grid Orientation: Transient Electromagnetic Approach. Appl. Sci. 2019, 9, 5270.

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