Title :
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
fDate :
1/1/1993 12:00:00 AM
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;
Journal_Title :
Power Delivery, IEEE Transactions on
