NDLI: Experimental Study of the Discharge Area of Soil Breakdown Under Surge Current Using X-Ray Imaging Technology

Content Provider	IEEE Xplore Digital Library
Author	Wenxia Sima Sanwei Liu Tao Yuan Donghui Luo Peng Wu Bin Zhu
Copyright Year	1972
Abstract	A penetrating X-ray imaging technology is applied to study the soil ionization under surge current, by which grayscale images are obtained. Based on soil breakdown mechanism, there are series of discharge channels generating in the soil. By comparing the discharge time and imaging time, the filamentary paths, which can be directly observed in these grayscale images, are determined to be discharge air channels. The principle and process of imaging are introduced in detail in this paper. According to the Beer-Lambert law, the relationship between grayscale value and equivalent air thickness of any points in the discharge channel area has been proposed. Image processing technology is used to dispose the grayscale images to make them more distinct for analysis without losing the accurate information of the original images by maintaining their grayscale value percentage. Analyses of experimental imaging results are also presented, and effects of factors, such as configuration of grounding electrode and amplitude of surge current, are considered on the distribution of discharge channels as well. In addition, soil residual resistivity of discharge area was calculated by a finite-element method, according to experiment parameters and 3-D diagram of discharge area.
Sponsorship	IEEE Industry Applications Society
Starting Page	5343
Ending Page	5351
Page Count	9
File Size	1447543
File Format	PDF
ISSN	00939994
Volume Number	51
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Discharges (electric) Gray-scale Soil Grounding Electrodes X-ray imaging Surges soil residual resistivity Grounding system X-ray soil ionization grayscale images discharge channels Discharge channels grounding system
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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