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2021 (English)In: 2021 IEEE PES Innovative Smart Grid Technologies - Asia, ISGT Asia 2021, Institute of Electrical and Electronics Engineers (IEEE) , 2021Conference paper, Published paper (Refereed)
Abstract [en]
Compared to the wind farm itself, wind farm transformers are often oversized with regard to their capacity and lifetime. One of the reasons is that power transformers are normally sized at planning stage according to their rated power limits instead of their thermal limits. The thermal limits are usually considered only in operation. In this paper, a new method is proposed to take thermal limits into account and size the wind farm transformer at planning stage based on the expected life of the transformer insulation. An analytical model of wind turbine wakes loss is combined with the transformer thermal model to calculate the expected lifetime of the transformer insulation more accurately. Different from the previous approaches, the proposed method considers both the wake effect and the time-varying ambient temperature. Results show that compared to using the constant temperature and predicted power output without wake loss consideration, the expected lifetime of transformer insulation evaluated after involving these two factors is closer to the result evaluated based on the measured wind power.
Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2021
Keywords
ambient temperature, transformer size, wake effect, wind power, Electric power system interconnection, Electric utilities, Power transformers, Temperature, Thermal insulation, Wakes, Expected lifetime, Planning stages, Power limit, Thermal limits, Thermal winds, Transformer insulation, Wake loss, Wind farm
National Category
Software Engineering
Identifiers
urn:nbn:se:kth:diva-316264 (URN)10.1109/ISGTASIA49270.2021.9715702 (DOI)000812323700155 ()2-s2.0-85126996864 (Scopus ID)
Conference
2021 IEEE PES Innovative Smart Grid Technologies - Asia (ISGT Asia), Brisbane, Australia, December 5-8, 2021
Note
Part of proceedings: 978-1-6654-3339-6
QC 20220819
2022-08-192022-08-192025-05-22Bibliographically approved