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dc.contributor.authorAakre, Torstein Grav
dc.contributor.authorIldstad, Erling
dc.contributor.authorHvidsten, Sverre
dc.date.accessioned2018-12-14T12:12:27Z
dc.date.available2018-12-14T12:12:27Z
dc.date.created2018-10-11T14:26:19Z
dc.date.issued2018
dc.identifier.citation2018 IEEE Electrical Insulation Conference - EICnb_NO
dc.identifier.isbn978-1-5386-4178-1
dc.identifier.urihttp://hdl.handle.net/11250/2577738
dc.description.abstractThis paper presents results from laboratory measurements of partial discharge (PD) activity in 50 cm long samples cut from the mainwall section of old hydrogenerator stator bars. All stator bars were manufactured in 1976 and samples were taken after 35 years in service from both the low and high voltage sections of the generator, as well as non-energized back-up bars. The PD activity, using a phase resolved (PRPDA) measuring system, was investigated at different test voltages up to 9.6 kV (1.5 U 0 ), frequencies and temperatures in the range 20–155 °C and 0.1-50 Hz, respectively. The service-aged and the unaged reference samples showed a clear difference in voltage frequency dependence. It was, however, not possible to distinguish between service-aged bars from high and low electric stress. The observed frequency and temperature dependences are discussed with respect to theoretical assumptions regarding possible void degradation and surface conductivity.nb_NO
dc.description.abstractCondition Assessment of Hydrogenerator Stator Bar Insulation Using Partial Discharge Measurementsnb_NO
dc.language.isoengnb_NO
dc.publisherIEEEnb_NO
dc.relation.ispartof2018 IEEE Electrical Insulation Conference - EIC
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleCondition Assessment of Hydrogenerator Stator Bar Insulation Using Partial Discharge Measurementsnb_NO
dc.title.alternativeCondition Assessment of Hydrogenerator Stator Bar Insulation Using Partial Discharge Measurementsnb_NO
dc.typeChapternb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber357-360nb_NO
dc.identifier.cristin1619730
dc.relation.projectNorges forskningsråd: 255099nb_NO
cristin.unitcode7548,30,0,0
cristin.unitnameElkraftteknologi
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal