电力变压器的振动和噪声及消减措施研究

Abstract

随着越来越多变电所建于居民区和商业区内，变压器噪声问题变得十分突出。变压器噪声水平的高低，已经成为了衡量变压器生产厂家设计和制造水平的重要指标。在负载电流工况下，变压器的振动和噪声主要是由绕组电磁力产生的。本文从噪声传播路径考虑，研究了振动和噪声的来源和传播途径，以及相应的消减措施，利用ANSYS Workbench和Virtual.Lab Acoustics软件联合仿真，建立了变压器实体模型，通过数值分析方式模拟变压器电磁作用产生的振动和噪声，初步验证了消减措施效果。变压器振动和噪声试验进一步验证了消减措施的有效性，同时证实了数值分析方法的可靠性。 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.