Computation of electromagnetic forces in the windings of amorphous core transformers

Abstract

Electromagnetic forces generated by the short circuit current and leakage flux in low-and high-voltage windings of distribution transformers as well as amorphous core transformers will cause the translation, destruction, and explosion of the windings. Thus, the investigation of these forces plays a significant role for researchers and manufacturers. Many authors have recently used the finite element method to analyze electromagnetic forces. In this paper, an analytic model is first developed for magnetic vector potential formulations to compute the electromagnetic forces (i.e., axial and radial forces) acting on the low-and high-voltage windings of an amorphous core transformer. The finite element technique is then presented to validate the results obtained from the analytical model. The developed model is applied to an actual problem.

Calculation of electromagnetic force and temperature distribution of amorphous transformers in different operating modes by finite element method

“…The method of CFD is applied to simulate the temperature distribution on the windings of a dry-type ASCT 560 kVA-22/ 0.4 kV in different working cases (Bao, 2022). The distributions of the scattered magnetic fields, dissipative reactance and EMF affecting the high voltage and low voltage windings (HLVWs) of the transformer in case of SC are analyzed and calculated using FEM (Bao et al, 2023;Yahiou et al, 2022;Jin et al, 2022).…”