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Power transformers in their normal lifetime span often encounter unbalanced loads or even DC bias currents that shift the normal operational point of the unit. The influence of a delta connected winding on the magnetizing current waveform of a power transformer will be presented here in more detail. The behavior of an active part is modeled using the system of nonlinear equations solved iteratively,...
A power transformer operating in electric network is supplied by voltage source. When analyzing leakage flux and magnetic forces of the power transformer applied to windings, the field-circuit coupled 3D finite element method is needed because of the drawbacks of magnetic dipole model and 2D finite element method. The models were used for simulating and analyzing leakage flux and magnetic forces data...
Transformers are required to demonstrate the operative ability by analysis of electromagnetic characteristic and parameters calculation, and it is difficult to describe the winding deformation quantitatively. Based on finite element method (FEM), the model comprising iron-core and windings is shown. In this paper, the electromagnetic characteristic is analyzed by coupled field-circuit, and the leakage...
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