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Cristin-resultat-ID:
1252420
Sist endret:
4. juli 2015, 18:25
NVI-rapporteringsår:
2015
Resultat
Vitenskapelig artikkel
2015
Condition assessment of XLPE MV cable joints by using an insulator tester
Henrik Enoksen
Espen Eberg
Sverre Hvidsten
Ole Johan Hatlen
og
Eva A. Rognsvaag
Tidsskrift
Tidsskrift
CIRED Conference Proceedings
ISSN 2032-9644
NVI-nivå 1
Finn i kanalregisteret
Om resultatet
Om resultatet
Vitenskapelig artikkel
Publiseringsår: 2015
Artikkelnummer: 486
Beskrivelse
Beskrivelse
Engelsk
Tittel
Condition assessment of XLPE MV cable joints by using an insulator tester
Sammendrag
Condition assessment of water treeing in medium voltage XLPE cable insulations by tan δ measurements is well established. If a measured cable section has one or more joints with low insulation resistance, the assessment of the complete cable link can be difficult as the tan δ is significantly higher for the joints than for the cable insulation. This paper describes a simple method based on using an insulation tester to reveal if joints with low resistance are present in the cable link. Measurements have been performed on cable samples taken from service after more than 20 years due to high tan δ values and partial discharges located in the cable. The joints were characterized in the laboratory by time domain dielectric response and dielectric spectroscopy. It has been shown that both the polarization and depolarization currents should be used during the assessment to provide robust evaluation criteria to distinguish the response of a low resistance joint from heavily water treed cable insulations avoiding misinterpretation of the cable condition. This method should be used before applying any other diagnostic equipment.
Vis
fullstendig beskrivelse
Bidragsytere
Bidragsytere
Henrik Enoksen
Forfatter
ved Elkraftteknologi ved SINTEF Energi AS
Espen Eberg
Forfatter
ved Elkraftteknologi ved SINTEF Energi AS
Sverre Hvidsten
Forfatter
ved Elkraftteknologi ved SINTEF Energi AS
Ole Johan Hatlen
Forfatter
ved BKK - Bergenshalvøens Kommunale Kraftselskap
Eva A. Rognsvaag
Forfatter
ved BKK - Bergenshalvøens Kommunale Kraftselskap
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