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

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5 Author(s)
S. L. Ho ; Dept. of Electr. Eng., Hong Kong Polytech. Univ., China ; Y. Li ; H. C. Wong ; S. H. Wang
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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.

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IEEE Transactions on Magnetics  (Volume:40 ,  Issue: 2 )