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Numerical calculation of 3D eddy current field and short circuit electromagnetic force in large transformers

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4 Author(s)
Tang Renyuan ; Shenyang Polytech. Univ., China ; Li Yan ; Li Dake ; Tian Lijian

The improved T-Ω method is employed to calculate the three-dimensional transient eddy current field in large transformers, as well as the short-circuit electromagnetic forces acting on the transformer windings. The effects of the magnetic shielding and initial angles of currents are studied, and the nonuniform distribution of ampere-turn along the height of the windings is taken into account. Thus, a common software package is developed. Two different transformers are analyzed, and the computed results show agreement with measured ones

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Magnetics, IEEE Transactions on  (Volume:28 ,  Issue: 2 )