Time domain modeling of eddy current effects for transformer transients

Author

De Leon, Francisco ; Semlyen, Adam

Author_Institution

Dept. of Electr. Eng., Toronto Univ., Ont., Canada

Volume

8

Issue

1

fYear

1993

fDate

1/1/1993 12:00:00 AM

Firstpage

271

Lastpage

280

Abstract

Eddy current effects are included in a model of a power transformer for the study of electromagnetic transients. Existing analytical formulae for the calculation of losses in the windings are evaluated. Various equivalent circuits are fitted to represent in the time domain the damping produced by eddy currents in the windings. A frequency dependent model is derived for the iron core, based on the physical distribution of losses and magnetization effects. The parameters of this model are obtained by optimal discretization of the laminations. Simulation show the effects of eddy current in the damping of transients

Keywords

damping; eddy current losses; electromagnetic field theory; equivalent circuits; laminations; magnetisation; power transformers; time-domain analysis; transformer windings; transients; EM field theory; damping; eddy current; electromagnetic transients; equivalent circuits; frequency dependent model; iron core; laminations; losses; magnetization; optimal discretization; power transformer; time domain; transients; windings; Damping; Eddy currents; Electromagnetic modeling; Equivalent circuits; Frequency dependence; Iron; Magnetic analysis; Power transformers; Transformer cores; Transient analysis;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.180346

Filename

180346