Development and simulation evaluation of a magnetorheological elastomer isolator for transformer vibration control

Vibration generated by the large power transformer has a harmful effect on the surrounding buildings and environment as a consequence of structure-borne propagation or air noise, and impacts on the stability and service life of precision machinery within the substation. Now, the study of vibration of transformer and related vibration isolation technology has attracted more and more attention by power supply departments and relevant transformer manufacturing enterprises. To decrease the transformer vibration. This paper investigated the ON-OFF controller for transformer vibration isolation system. Firstly, the performance of the vertical magnetorheological elastomer (MRE) isolator is evaluated by sweep frequency test. Then ON-OFF controller designed and applied to control isolator. Finally, numerical simulations with multi-frequency excitations are conducted to verify the effectiveness of the controller. The ON-OFF controller and passive controller are compared at base and the bottom of transformer in response displacement to demonstrate the effectiveness and superiority of ON-OFF controller.