The Chinese first 110 kV vegetable-oil main transformer takes vegetable oil as its heat dissipation medium via convective circulation.In order to understand the vibration characteristics of this large-scale vegetable-oilimmersed transformer

this study firstly established a two-dimensional vibration model of vibration source in vegetable oil medium based on the vibration mechanism of transformer and the finite element simulation software

and investigated the propagation characteristics of the mechanical waves in vegetable oil.Then

according to the propagation characteristics of the mechanical waves

six vibration measuring points were set on both high and low pressure sides of the fuel tank wall of the transformer to collect vibration signals.A three-dimensional simulation model of the transformer was set up

and the vibration signal analysis method way employed to reveal the vibration characteristics of the transformer.The study may provide a basis for application of the vibration monitoring method to the fault monitoring of the large-scale vegetable-oil-immersed transformer.