Numerical simulation of transient force and eddy current loss in a 720-MVA power transformer

Author

Ho, S.L. ; Li, Y. ; Wong, H.C. ; Wang, S.H. ; Tang, R.Y.

Author_Institution

Dept. of Electr. Eng., Hong Kong Polytech. Univ., China

Volume

40

Issue

2

fYear

2004

fDate

3/1/2004 12:00:00 AM

Firstpage

687

Lastpage

690

Abstract

The transient eddy current fields are short-circuit forces upon the coils of large power transformers are analyzed. The proposed approach is based on the A-V-A formulation in which the eddy current field and the electric circuit equations are solved simultaneously. The effectiveness of a magnetic bypass plate near the coils ends for reducing the eddy current loss and the local overheating is discussed. A simulation to study the transient short-circuit behavior of a 720-MVA power transformer using the proposed coupled approach is reported.

Keywords

eddy current losses; electromagnetic coupling; electromagnetic forces; power transformers; A-V-A formulation; eddy current loss; electric circuit equations; local overheating; magnetic bypass plate; numerical simulation; power transformer; short-circuit forces; transient eddy current fields; transient force; Circuit simulation; Coils; Coupling circuits; Eddy currents; Electromagnetic fields; Electromagnetic transients; Equations; Magnetic flux; Numerical simulation; Power transformers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.824801

Filename

1284507