Research on Vibrations and Noises of Power Transformer and Its' Reduction Measures

As more and more substations are built in residential and commercial areas, transformer noise becomes very prominent. Transformer noise level has become the important indicator to measure design and manufacture level of transformer manufacturers. Under working condition of load current, the main source of transformer vibration and noise is winding electromagnetic force. Considering from noise propagation path, this paper studies the source of vibration and noise, route of transmission and the corresponding reduction measures. It takes advantage of ANSYS Workbench and Virtual Lab Acoustics software to simulation analysis and builds the solid model of transformer. On the basis of the solid model, it simulates transformer vibration and noise generated by electromagnetic interaction by means of numerical analysis method and preliminarily verifies the effect of the reduction measures. Then, the test of transformer vibration and noise further verifies the effectiveness of the reduction measures and meanwhile confirms the reliability of the numerical analysis method.