The vibration analysis for transformer winding based on multi-field coupling

Mathematical models for DC bias vibration analysis of the transformer winding are developed. The model is combined into multi-physical field coupling modeling for vibration analysis of the transformer. By applying the primary voltage as excitation and under different DC bias, vibration of the transformer winding is simulated and analyzed. The simulation results verify the method which is proposed transformer magnetic vibration field coupling analysis with dc bias is effective.