The effects of superimposed impulse transients on partial discharge in XLPE cable joint

•Partial discharge (PD) can be initiated in XLPE cable system by superimposed impulses.•The initiated PD may extinguish or persist actively under AC voltage after impulses.•PD under impulse depends on local electric field, defects condition and aging status.•Multiple impulses may decrease PD incepti...

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Bibliographic Details
Published inInternational journal of electrical power & energy systems Vol. 110; pp. 497 - 509
Main Authors Wu, Jiayang, Rodrigo Mor, Armando, Smit, Johan J.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.09.2019
Subjects
Cable accessories
Impulse transients
Insulation defects
Partial discharge (PD)
XLPE cable
Insulation defects
XLPE cable
Cable accessories
Partial discharge (PD)
Impulse transients
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Summary:•Partial discharge (PD) can be initiated in XLPE cable system by superimposed impulses.•The initiated PD may extinguish or persist actively under AC voltage after impulses.•PD under impulse depends on local electric field, defects condition and aging status.•Multiple impulses may decrease PD inception voltage or accelerate the aging process. In practice, cross-linked polyethylene (XLPE) power cables can be subjected to alternating voltage with superimposed impulse transients. Such impulse transients may initiate partial discharges (PD) in insulation defects even below AC inception voltage. An initiated PD may persist under AC, which will cause insulation degradation. This paper investigates the PD behavior in MV XLPE cable accessories under impulse transients. Different scenarios of PD behavior are measured, described and analyzed. Based on the results, the effects of impulse transients on PD are summarized.
ISSN:0142-0615
1879-3517
DOI:10.1016/j.ijepes.2019.03.031