NDLI: Testing continuity of grounding grid using the AC current injection method

Content Provider	IEEE Xplore Digital Library
Author	Yan Ma Karady, G.G. Kucuksari, S.
Copyright Year	2010
Description	Author affiliation: School of Electrical, Computer, and Energy Engineering at Arizona State University, Tempe, 85287 USA (Karady, G.G.) \|\| School of Electrical, Computer, and Energy Engineering, Arizona State University, Tempe, 85287 USA (Yan Ma; Kucuksari, S.)
Abstract	We propose here a cost-effective, realistic method for testing the continuity of the grounding grid and for identifying its weak points or discontinuities. The proposed method involves injecting an ac current of ∼200 A frequency not 60 Hz or 60 Hz harmonic into a grounding grid. The purpose of the frequency setting is to be able to distinguish the magnetic field produced by the injected current when the substation is energized. The magnetic field generated by the current flowing in the buried grid conductors is then measured above the ground. A strong magnetic field indicates that the grounding grid is in good condition; a weak magnetic field indicates that some damage may exist. Two field tests were conducted to demonstrate that the proposed method works effectively in determining the continuity of the grounding grid.
Starting Page	1
Ending Page	6
File Size	884884
Page Count	6
File Format	PDF
ISBN	9781424465491
ISSN	19449925
e-ISBN	9781424465514
e-ISBN	9781424483570
DOI	10.1109/PES.2010.5590219
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Grounding Magnetic fields Magnetic field measurement Substations Conductors Current measurement Generators substation grounding Continuity grounding grounding grids
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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