NDLI: Effect of the Formation of the Dry Zone Around Underground Power Cables on Their Ratings

Content Provider	IEEE Xplore Digital Library
Author	Gouda, O.E. El Dein, A.Z. Amer, G.M.
Copyright Year	1986
Abstract	Many factors affect the loading of the underground power cables, such as ambient temperature, depth of laying of cable, number of parallel circuits of cable, and thermal resistivity of the surrounding soil. One important factor, usually ignored, is the formation of dry zones around the underground power cables. Dry zones are usually formed around underground power cables under loading conditions due to the migration of moisture within the soil. In this paper, the effect of the formation of the dry zone on the ampacity of underground power cables is investigated. The derating factor for the formation of dry zones around underground power cables is suggested and calculated for different types of natural backfill soil. IEC 60287-1-3 is taken as a reference. Experimental work was conducted to study the phenomena of the dry zone as related to different types of soils.
Sponsorship	IEEE Power Engineering Society
Starting Page	972
Ending Page	978
Page Count	7
File Size	693201
File Format	PDF
ISSN	08858977
Volume Number	26
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Soil Thermal resistance Conductivity Heating Underground power cables Temperature temperature distribution Cable ampacity de-rating factor dry zone
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology 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
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Load cycling of underground distribution cables including thermal soil resistivity variation with soil temperature and moisture content

Ampacity derating factors for cables buried in short segments of conduit

Cable Ampacity Calculations: A Comparison of Methods

Effects of Backfilling on Cable Ampacity Analyzed With the Finite Element Method

On-line monitoring device for dry zone formation in the soil surrounding underground power cables

Algorithm for load cycling correction to minimise the dry zone influences on the cross-linked polyethylene (XLPE) cable insulation

Generalized Coefficients of External Thermal Resistance for Ampacity Evaluation of Underground Multiple Cable Systems

Nonlinear-coupled electric-thermal modeling of underground cable systems

Optimal placement of underground cables to maximise total ampacity considering cable lifetime

Effect of the Formation of the Dry Zone Around Underground Power Cables on Their Ratings

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Effects of Backfilling on Cable Ampacity Analyzed With the Finite Element Method

On-line monitoring device for dry zone formation in the soil surrounding underground power cables

Algorithm for load cycling correction to minimise the dry zone influences on the cross-linked polyethylene (XLPE) cable insulation

Generalized Coefficients of External Thermal Resistance for Ampacity Evaluation of Underground Multiple Cable Systems

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