Thermal model for power transformers dynamic loading

Author

Elmoudi, A. ; Lehtonen, M. ; Nordman, Hasse

Author_Institution

Power Syst. & HV Eng., Helsinki Univ. of Technol., Espoo

fYear

2006

fDate

11-14 June 2006

Firstpage

214

Lastpage

217

Abstract

This paper presents a thermal model of a power transformer in the form of simple equivalent circuit. The model is established to calculate the top oil and hot spot temperatures. The model parameters are obtained from manufacturer test data and an electromagnetic analysis using finite element method (FEM). The model results are compared with measured data obtained from 250 MVA, 230plusmn8times1.5%/118/21 kV ONAF transformer equipped with fiber optic probes and tested according to a load cycle comprising a short time load up to 2.1 pu. The results are additionally compared with the conventional equations of the IEEE clause 7

Keywords

IEEE standards; equivalent circuits; finite element analysis; power transformer testing; thermal analysis; IEEE clause 7; ONAF power transformer testing; dynamic loading; electromagnetic analysis; equivalent circuit; fiber optic probe; finite element method; hot spot temperature; thermal model; Circuit testing; Electromagnetic analysis; Electromagnetic modeling; Equivalent circuits; Finite element methods; Petroleum; Power transformers; Temperature; Thermal loading; Virtual manufacturing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 2006. Conference Record of the 2006 IEEE International Symposium on

Conference_Location

Toronto, Ont.

ISSN

1089-084X

Print_ISBN

1-4244-0333-2

Type

conf

DOI

10.1109/ELINSL.2006.1665295

Filename

1665295