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Author Coelho, R. ♦ Aladenize, B. ♦ Mirebeau, P.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1996
Language English
Subject Keyword Power cables ♦ Steady-state ♦ Poisson equations ♦ Space charge ♦ Conductivity ♦ Temperature dependence ♦ Dielectrics and electrical insulation ♦ Conducting materials ♦ Permittivity ♦ Virtual colonoscopy
Abstract In a d.c. power cable in operation, the temperature, and hence the conductivity /spl sigma/ of the insulation, increases from sheath to core. Combined with the local field, this radial conductivity gradient builds up an "intrinsic space-charge. In his treatment of charge buildup, Lau (1970) considered the temperature dependence of /spl sigma/ but not its field dependence. Here, this topic is revisited using the mean radius r~ and the reduced field, ratio of the actual field over the field without space-charge. By comparing the predictions with the field distribution measured by the techniques now available, the "extrinsic" injected charges, important for the cable life, should become distinguishable.
Description Author affiliation: Alcatel Alsthom Recherche, Marcoussis, France (Coelho, R.)
ISBN 0780335805
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1996-10-23
Publisher Place USA
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 324.93 kB
Page Count 5
Starting Page 278
Ending Page 282

Source: IEEE Xplore Digital Library