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dc.contributor.authorEtxegarai, A.
dc.contributor.authorValverde, V.
dc.contributor.authorEguia, P.
dc.contributor.authorPerea, E.
dc.date.accessioned2020-06-02T15:31:28Z
dc.date.available2020-06-02T15:31:28Z
dc.date.issued2020
dc.identifier.issn1309-0127en
dc.identifier.urihttp://hdl.handle.net/11556/928
dc.description.abstractCurrently, dry-type transformers are commonly installed as wind turbine step-up (WTSU) transformers, especially in offshore wind farms. Due to their low flammability and resistance to moisture, their performance is optimal in offshore platforms. Nonetheless, their thermal-electrical degradation must be carefully considered given the special wind and weather conditions in marine environments. The present paper studies the thermal aging of dry-type WTSU transformers in offshore wind farms considering the most thermally stressed location i.e. the winding hot-spot. The estimation of the transformer lifetime consumption introduced in this work can be applied in the framework of digital twins for diagnostic and prognostic monitoring purposes The thermal degradation study is based on a typical offshore load profile and includes the analysis of the impact of several transformer characteristics and operating conditions. As a result of the analysis, it can be concluded that lower temperature insulations, forced air cooling systems, a lower mean winding temperature rise and cool ambient temperatures lead to decreased loss of life values. Also, the present work suggests the suitability of considering thermal degradation studies as an optimal sizing factor for offshore WTSU given the low ambient temperatures in marine environment and the low capacity factors.en
dc.description.sponsorshipThe authors gratefully acknowledge the Support of the Basque Government (project ELKARTEK KK - 2018/00096 and GISEL research group IT1191-19), as well as of the University of the Basque Country UPV/EHU (research group unding GIU18/181).en
dc.language.isoengen
dc.publisherGazi Universityen
dc.titleAnalysis of loss of life of dry-type WTSU transformers in offshore wind farmsen
dc.typearticleen
dc.rights.accessRightsopenAccessen
dc.subject.keywordsDigital twinen
dc.subject.keywordsDry-type transformeren
dc.subject.keywordsHot spot temperatureen
dc.subject.keywordsLoss of lifeen
dc.subject.keywordsWind energyen
dc.issue.number1en
dc.journal.titleInternational Journal of Renewable Energy Researchen
dc.page.final455en
dc.page.initial448en
dc.volume.number10en


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