Mechanism of space charge formation in cross linked polyethylene (XLPE) under temperature gradient

A bipolar charge transport model is used to simulate the formation of space charge in XLPE plaques placed under a temperature gradient. The model is used to assess the relative importance of charge migration and blocked extraction for three possible effects of the temperature gradient. The simulatio...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2015-12, Vol.22 (6), p.3186-3196
Main Authors: Zepeng Lv, Junzheng Cao, Xia Wang, Haitian Wang, Kai Wu, Dissado, L. A.
Format: Article
Language:English
Subjects:
blocked extraction
Computer simulation
Cross-linked polyethylene
Electric fields
Electrical insulation
Electrodes
Formations
heterocharge
Ions
Migration
Polyethylene
Space charge
Temperature distribution
Temperature gradient
Temperature measurement
XLPE
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Summary:A bipolar charge transport model is used to simulate the formation of space charge in XLPE plaques placed under a temperature gradient. The model is used to assess the relative importance of charge migration and blocked extraction for three possible effects of the temperature gradient. The simulations were carried out for samples with different thicknesses and the results verified by comparison with experiment. In this way it has been shown that not only does the temperature gradient influence space charge accumulation through its introduction of a conductivity gradient, but also through differences in the injecting and extracting processes at electrodes of different temperature.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2015.005278