Cristin-resultat-ID: 1826643
Sist endret: 23. mars 2021, 15:43
NVI-rapporteringsår: 2020
Resultat
Vitenskapelig artikkel
2020

Measurement-based frequency-dependent model of a HVDC transformer for electromagnetic transient studies

Bidragsytere:
  • Bjørn Gustavsen og
  • Yannick Vernay

Tidsskrift

Electric power systems research
ISSN 0378-7796
e-ISSN 1873-2046
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2020
Publisert online: 2019
Trykket: 2020
Volum: 180
Artikkelnummer: 106141
Open Access

Importkilder

Scopus-ID: 2-s2.0-85077107225

Beskrivelse Beskrivelse

Tittel

Measurement-based frequency-dependent model of a HVDC transformer for electromagnetic transient studies

Sammendrag

A wide-band, frequency-dependent five-terminal model is developed that represents one HVDC transformer unit in the French-English IFA2000 HVDC interconnection. Three such interconnected 1-ph units constitute one 3-ph transformer bank needed in 12-pulse conversion. The model is obtained via admittance frequency sweep measurements on the transformer's terminals, including common-mode measurements to capture the high-impedance coupling to earth at lower frequencies. The data set is modified to reduce the magnetizing current to a realistic level by a novel eigenvalue scaling procedure. The final data set is subjected to modeling by a stable and passive rational model while utilizing a mode-revealing transformation to retain the accuracy of the small eigenvalues that are related to the high-impedance coupling to earth. The paper describes details related to the measurements and modeling steps as well as the many intermediate accuracy validations that were done. Also is described challenges in the measurements that resulted due to interference of the measurements by a nearby 400 kV overhead line. The model is applied in a time domain simulation of the complete HVDC link in normal operation where voltage waveforms resulting from line commutations are compared against those by a classical model with added stray capacitances.

Bidragsytere

Bjørn Gustavsen

  • Tilknyttet:
    Forfatter
    ved Energisystemer ved SINTEF Energi AS

Yannick Vernay

  • Tilknyttet:
    Forfatter
    ved Frankrike
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