Title :
Investigation of transformer top-oil temperature considering external factors
Author :
Arifianto, I. ; Josue, F. ; Saers, R. ; Rosenlind, Johanna ; Hilber, Patrik ; Suwarno
Author_Institution :
PT. PLN (Persero), Jakarta, Indonesia
Abstract :
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.
Keywords :
power transformer insulation; transformer oil; transformer windings; ONAF transformer unit; ONAN cooling mode; ambient temperature variation; apparent power 63 MVA; monitoring system; oil viscosity; subarctic climate; thermal model; transformer top-oil temperature estimation; voltage 140 kV; voltage 55 kV; weather station; wind velocity; Atmospheric modeling; Load modeling; Mathematical model; Oil insulation; Power transformers; Temperature; Temperature measurement; external factors; monitoring; power transformer; thermal model; top-oil temperature; wind velocity;
Conference_Titel :
Condition Monitoring and Diagnosis (CMD), 2012 International Conference on
Conference_Location :
Bali
Print_ISBN :
978-1-4673-1019-2
DOI :
10.1109/CMD.2012.6416409
