The electromagnetic forces caused by short-circuits consisting of radial and axial forces impose mechanical damages and failures to the windings. The engineers have tried to decrease these forces using dierent techniques and innovations. Utilization of various kinds of winding arrangements is one of these methods, which enable the transformers and fault current limiters to tolerate higher forces without a substantial increase in construction and fabrication costs. In this paper, a distributed winding arrangement is investigated in terms of axial and radial forces during short-circuit condition in a three-phase FCL. To calculate the force magnitudes of AC and DC supplied windings, a model based on the nite element method in time stepping procedure is employed. The three-phase AC and DC supplied windings are split into multiple sections for more accuracy in calculating the forces. The simulation results are compared with a conventional winding arrangement in terms of leakage ux and radial and axial force magnitudes. The comparisons show that the distributed winding arrangement mitigates radial and especially axial force magnitudes signicantly.
Comments: 17 Pages.
[v1] 2016-05-20 23:27:18
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