Cristin-resultat-ID: 2024404
Sist endret: 5. januar 2023, 08:35
NVI-rapporteringsår: 2022
Resultat
Vitenskapelig artikkel
2022

Modeling of Internal Pressure Dynamics in Mass-Impregnated Nondraining HVDC Cables

Bidragsytere:
  • Øystein Leif Gurandsrud Hestad
  • Magne Runde
  • Henrik Enoksen og
  • Niklas Magnusson

Tidsskrift

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

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2022
Publisert online: 2022
Trykket: 2022
Volum: 29
Hefte: 3
Sider: 1135 - 1142
Open Access

Importkilder

Scopus-ID: 2-s2.0-85132538022

Beskrivelse Beskrivelse

Tittel

Modeling of Internal Pressure Dynamics in Mass-Impregnated Nondraining HVDC Cables

Sammendrag

Changing the current loading of mass-impregnated nondraining (MIND) power cables causes the pressure in the insulation to vary over a wide range. It is generally recognized that under certain conditions—typically after a large load reduction—the pressure becomes so low that shrinkage cavities (voids) form in the insulation and that partial discharges (PDs) may damage the insulation ignite. A finite-element model for temperature, electric field, and pressure dynamics throughout the insulation layer has been developed. Comparisons with previously obtained measurements on full-scale high voltage direct current (HVDC) subsea cable samples subjected to a variety of loading patterns, external pressures (sea depths), and ambient temperatures show that the model replicates the pressure behavior of the insulation reasonably well. Most importantly, the complicated viscoelastic properties of the lead sheath, which have a profound effect on the internal pressure dynamics and thereby on the prospects of forming potentially harmful cavities, appear to be sufficiently accurately modeled.

Bidragsytere

Øystein Leif Gurandsrud Hestad

  • Tilknyttet:
    Forfatter
    ved Elkraftteknologi ved SINTEF Energi AS

Magne Eystein Runde

Bidragsyterens navn vises på dette resultatet som Magne Runde
  • Tilknyttet:
    Forfatter
    ved Elkraftteknologi ved SINTEF Energi AS

Henrik Enoksen

  • Tilknyttet:
    Forfatter
    ved Elkraftteknologi ved SINTEF Energi AS

Niklas Magnusson

  • Tilknyttet:
    Forfatter
    ved Elkraftteknologi ved SINTEF Energi AS
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