Finite Element Simulation for Transformer Winding Vibration Propagation

For lacks of propagation model, propagation property and corresponding simulation of winding vibration in oil, this paper establishes and analyzes a magnetic coupled field-structure-fluid coupling model with finite element software for vibration propagation in oil. The simulations and experiments are carried out for a 10/0.4 kV single phase power transformer with continuous disk windings. The results show that the pressure fluctuation in the fuel tank comes from the linear superposition of the pressure wave of high and low voltage winding; wave pressure caused by high voltage winding and the whole winding ranges from -0.2 Pa to 0.39 Pa and from -0.15 Pa to 0.39 Pa respectively; the vibration from low voltage winding can be affected by the high voltage winding during propagation, therefore the tank vibration is greatly influenced by the vibration from high voltage winding. Tank vibration depends on the radiation pressure field of winding vibration and its vibration property, and the maximum acceleration gets 1.1 mm/s2 and locates near the high voltage winding. It is suggested to detect the vibration in flat area where is close to the transformer winding to obtain a relatively larger vibration response. © 2018, Editorial Department of Journal of Southwest Jiaotong University. All right reserved.