To investigate the seismic performance of ±800 kV UHV converter transformer

we adopted FEM analysis on an UHV converter transformer to analyze and obtain the displacements

stresses

and accelerations of the critical parts. Moreover

we analyzed the influences of the dynamic properties of bushings and the amplification factors of transformer tank

turrets on the tank plate and turrets of the bushings. The results indicate that the vertical response of the transformer is large and reaches to 387 mm. The amplification factors of the acceleration and the stress at the bottom and the displacement at the top of the bushing are different

and the ratio of them is 1:2.18:0.55. Moreover

the acceleration amplification factor is greater than the value recommended by corresponding standard in the plateau part of the earthquake response spectra. The frequency of bushing is decreased and the responses are amplified by turrets and transformer tank. The top displacement of bushing is remarkable

and the amplification factors of stress

acceleration

and displacement are much different

which should be concerned in evaluating the seismic performance of the bushings.