Vibration Characteristics of a Ultra-High Voltage Transformer Core Excited by DC Bias

This study investigates the vibration mechanism of the core andof an ultra-high voltage transformer excited by DC bias magnetism. By establishing a multi-physics field finite element transformer model, this model is made to be consistent with the UHV transformer from the core structure, the way of winding connection, the turns ratio between each winding, the capacity ratio. The vibration law of the core unde $D C$ bias of the transformer under no-load condition is investigated, and the weakness when the core is subjected to DC bias magnetism are figured out, which provides an important reference for the assessment of DC bias magnetism tolerance ability of the extrahigh voltage transformer and the suppression measures DC bias.