Experimental Study on Seismic Performance of UHV Transformers

Abstract

In order to study the seismic response characteristics of UHV transformers under different earthquakes, a shaking table experiment study of UHV transformers was carried out. The results show that with the increase of seismic excitation, the acceleration of the side wall and the top plate of the box basically shows a linear increase; when the seismic wave is input in the Y direction, the acceleration response is larger and the increase amplitude of acceleration is also larger. The acceleration response of high, medium and low voltage bushings shows similar characteristic: the response when inputting the Y direction seismic wave is greater than that when inputting the X direction; the acceleration value is the largest when inputting X+Y direction seismic wave; the response when inputting the Y+Z direction seismic wave is greater than that when inputting the X+Z direction. As the seismic peak acceleration increases, bushing acceleration and strain gradually increase, the acceleration and strain when seismic waves are input in the Y direction are greater than those input in the X direction. When the seismic excitation increases increase from 0.8 g to 1.2 g, the acceleration and strain response increase amplitude less than those the seismic excitation increases from 0.4 g to 0.8 g.