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Dr. Shawki Hamed Arafah Ibrahim :: Publications:

Title:
Load cycling of underground distribution cables including thermal soil resistivity variation with soil temperature and moisture content
Authors: Ossama E Gouda, Gomaa FA Osman, Waleed AA Salem, Shawky H Arafa
Year: 2020
Keywords: Not Available
Journal: IET Generation, Transmission & Distribution
Volume: 12
Issue: 18
Pages: 4125-4133
Publisher: IET Digital Library
Local/International: International
Paper Link: Not Available
Full paper Shawki Hamed Arafah Ibrahim_005 Load cycling of underground distribution cables.pdf
Supplementary materials Not Available
Abstract:

As it is known the load of distribution cables is not constant with respect to the daytime, increasing the current in some hours may lead to an increase of soil surrounding the cable resistivity due to the migration of soil moisture content. Formation of dry zones may cause failure of cable insulation. Also because the soil thermal properties change with time according to the weather conditions of different seasons, the current capacity changes significantly from time to time. This paper studies the effect of dry zone formation during load cycling of underground cables on their temperature rise and the temperature distribution in the surrounding which is not considered by IEC 60853-2. The thermal model of the cables using the thermoelectric equivalent method is modified by including the thermal soil resistivity variation with soil temperature and moisture content. The finite element method is used also in this study to obtain …

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