Investigation of transformer top-oil temperature considering external factors
2012 (English)In: Condition Monitoring and Diagnosis (CMD), 2012 International Conference on, IEEE , 2012, 198-201 p.Conference paper (Refereed)
Standard estimation of top-oil temperature uses a thermal model related to load changes and variation of ambient temperature. Attempts have been done to improve the accuracy of top-oil temperature calculations by introducing internal properties into the model i.e. oil viscosity and winding resistance. The interest of this paper is to investigate the effect of external factors on top-oil temperature by looking into the weather, i.e. wind velocity. The results are compared with measurements on a 63MVA-ONAF 55/140 kV transformer unit, which is operated in ONAN cooling mode. The unit is located in subarctic climate, and it is equipped with a monitoring system and a weather station.
Place, publisher, year, edition, pages
IEEE , 2012. 198-201 p.
external factors, monitoring, power transformer, thermal model, top-oil temperature, wind velocity
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-119193DOI: 10.1109/CMD.2012.6416409ScopusID: 2-s2.0-84874255028ISBN: 978-146731020-8OAI: oai:DiVA.org:kth-119193DiVA: diva2:610017
2012 IEEE International Conference on Condition Monitoring and Diagnosis, CMD 2012, 23 September 2012 through 27 September 2012, Bali
QC 201303082013-03-082013-03-082013-10-07Bibliographically approved