Cristin-resultat-ID: 1716055
Sist endret: 20. januar 2020, 08:46
NVI-rapporteringsår: 2019
Resultat
Vitenskapelig artikkel
2019

Time domain dielectric response of field grading sleeves subjected to high humidity and temperatures

Bidragsytere:
  • Henrik Enoksen
  • Sverre Hvidsten
  • Biran Hasan Abil og
  • Frank Mauseth

Tidsskrift

IEEE transactions on dielectrics and electrical insulation
ISSN 1070-9878
e-ISSN 1558-4135
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2019
Publisert online: 2019
Trykket: 2019
Volum: 26
Hefte: 4
Sider: 1220 - 1228
Open Access

Importkilder

Scopus-ID: 2-s2.0-85070451328

Beskrivelse Beskrivelse

Tittel

Time domain dielectric response of field grading sleeves subjected to high humidity and temperatures

Sammendrag

It is experienced that MV XLPE cable links including heat shrink cable joints can have a high electrical conductivity compared to the XLPE cable insulation. The field grading sleeve included in the joint design is proposed to be responsible for the reduced insulation resistance and is therefore studied in this paper. New field grading sleeves are aged in the laboratory at temperatures up to 150 °C in both dry and humid conditions. The degree of ageing is determined by DSC measurements, the mechanical properties are determined by tensile strength testing, and the electric properties are characterized by time domain dielectric response measurements. The results show that after only a few days above the melting point of 104 °C the tensile strength of the material is strongly reduced. The electrical conductivity is strongly dependent on the degree of thermal ageing of the sleeve material but also the water content. The combination of significant thermal degradation and a high water content results in particularly high conductivity values. It is shown that the increase of the conductivity after ageing at 150 °C for 15 days is five orders of magnitude for wetted field grading sleeves measured at 30 °C.

Bidragsytere

Henrik Enoksen

  • Tilknyttet:
    Forfatter
    ved Elkraftteknologi ved SINTEF Energi AS

Sverre Hvidsten

  • Tilknyttet:
    Forfatter
    ved Elkraftteknologi ved SINTEF Energi AS

Biran Hasan Abil

  • Tilknyttet:
    Forfatter
    ved Institutt for elkraftteknikk ved Norges teknisk-naturvitenskapelige universitet

Frank Mauseth

  • Tilknyttet:
    Forfatter
    ved Institutt for elkraftteknikk ved Norges teknisk-naturvitenskapelige universitet
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