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

fYear

2012

fDate

23-27 Sept. 2012

Firstpage

198

Lastpage

201

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Condition Monitoring and Diagnosis (CMD), 2012 International Conference on

Conference_Location

Bali

Print_ISBN

978-1-4673-1019-2

Type

conf

DOI

10.1109/CMD.2012.6416409

Filename

6416409