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dc.contributor.authorGustavsen, Bjørn
dc.contributor.authorVernay, Yannick
dc.date.accessioned2020-10-24T09:21:46Z
dc.date.available2020-10-24T09:21:46Z
dc.date.created2020-09-02T09:50:10Z
dc.date.issued2020
dc.identifier.issn0378-7796
dc.identifier.urihttps://hdl.handle.net/11250/2684860
dc.description.abstractA 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.en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleMeasurement-based frequency-dependent model of a HVDC transformer for electromagnetic transient studiesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.rights.holderThe Authorsen_US
dc.source.volume180en_US
dc.source.journalElectric power systems researchen_US
dc.identifier.doi10.1016/j.epsr.2019.106141
dc.identifier.cristin1826643
dc.relation.projectNorges forskningsråd: 207160en_US
dc.relation.projectNorges forskningsråd: 207160en_US
dc.source.articlenumber106141en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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