NDLI: Effect of cross-linking agent on space charge accumulation in XLPE under DC electric stress

Content Provider	IEEE Xplore Digital Library
Author	Vissouvanadin, B. Le Roy, S. Teyssedre, G. Laurent, C. Denizet, I. Mammeri, M. Poisson, B.
Copyright Year	2009
Description	Author affiliation: Université de Toulouse; UPS, INP; LAPLACE (Laboratoire Plasma et Conversion d'Energie), Bat 3R3, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France (Vissouvanadin, B.; Le Roy, S.; Teyssedre, G.; Laurent, C.) \|\| Silec Cable, rue de Varennes Prolongée, 77876 Montereau Cedex, France (Denizet, I.; Mammeri, M.; Poisson, B.)
Abstract	Cross-linked polyethylene (XLPE) is extensively used for AC high voltage power cable for many years. Because of the risk of space charge under DC electric field in unmodified XLPE, this material is seldom used today for DC applications. Improvement of the cross-linking process could be an alternative way to prevent premature failure in high voltage direct current cables. In this work, the effect of two different peroxides (used as cross-linking agents) on space charge accumulation in XLPE for DC power cables has been investigated using the pulsed electro-acoustic method (PEA). Press-molded XLPE samples were degassed at 50°C for 3 days to remove cross-linking by-products and gold electrodes were deposited onto the specimens by sputtering. The samples have been successively stressed at different levels of electric field from 10 to 40kV7mm followed by a polarity reversal at −40kV7mm. The electrodes are grounded after each polarization procedure. Both XLPEs show almost the same tendency, especially for field lower than 30 kV/mm. Also, the so-called "mirror image effect" has been observed during the polarity reversal for both materials.
Starting Page	727
Ending Page	730
File Size	214863
Page Count	4
File Format	PDF
ISBN	9781424445578
ISSN	00849162
DOI	10.1109/CEIDP.2009.5377868
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Space charge Stress Voltage Power cables Electrodes Polyethylene Electric fields Pulsed electroacoustic methods Gold Sputtering charges injection XLPE PEA cross-linking byproducts heterocharges
Content Type	Text
Resource Type	Article

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