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

Bidragsytere:
  • Henrik Enoksen
  • Espen Eberg
  • Sverre Hvidsten
  • Ole Johan Hatlen og
  • Eva A. Rognsvaag

Tidsskrift

CIRED Conference Proceedings
ISSN 2032-9644
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2015
Artikkelnummer: 486

Beskrivelse Beskrivelse

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.

Bidragsytere

Henrik Enoksen

  • Tilknyttet:
    Forfatter
    ved Elkraftteknologi ved SINTEF Energi AS

Espen Eberg

  • Tilknyttet:
    Forfatter
    ved Elkraftteknologi ved SINTEF Energi AS

Sverre Hvidsten

  • Tilknyttet:
    Forfatter
    ved Elkraftteknologi ved SINTEF Energi AS

Ole Johan Hatlen

  • Tilknyttet:
    Forfatter
    ved BKK - Bergenshalvøens Kommunale Kraftselskap

Eva A. Rognsvaag

  • Tilknyttet:
    Forfatter
    ved BKK - Bergenshalvøens Kommunale Kraftselskap
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