Thermodynamic models and three-dimensional analysis for determination of Load Limits Transformers

Author

Pontes, C.E.V. ; Costa, S.F. ; Costa, M.C. ; Henriques, H.O. ; Aires, J.C.O. ; Fortes, M.Z.

Author_Institution

LIGHT S.E.S.A., Rio de Janeiro, Brazil

Volume

11

Issue

5

fYear

2013

fDate

Sept. 2013

Firstpage

1225

Lastpage

1231

Abstract

The power transformer thermal response related to a load curve can be verified by a tridimensional model using finite elements. This paper presents the modeling and the software developed for this purpose and compares the results with local tests data of two critical points - the top of the oil and the winding hot spot. Using the technique described, the maximum load limit of power transformers can be determinate, and operation costs and system expansion can be analyzed.

Keywords

power transformer insulation; thermodynamics; transformer oil; transformer windings; finite elements; load curve; loading transformer limit determination; local test data; maximum load limit; oil; operation costs; power transformer thermal response; system expansion; thermodynamic model; three-dimensional analysis; tridimensional model; winding hot spot; Atmospheric modeling; Computational modeling; Face; Load modeling; Power transformers; Software; Thermodynamics; load limits; overload; transformers;

fLanguage

English

Journal_Title

Latin America Transactions, IEEE (Revista IEEE America Latina)

Publisher

ieee

ISSN

1548-0992

Type

jour

DOI

10.1109/TLA.2013.6684397

Filename

6684397