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Time domain modeling of eddy current effects for transformer transients

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2 Author(s)
F. de Leon ; Dept. of Electr. Eng., Toronto Univ., Ont., Canada ; A. Semlyen

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

Published in:

IEEE Transactions on Power Delivery  (Volume:8 ,  Issue: 1 )