UHV controllable metal oxide surge arrester is an important part of substation electrical equipment. In order to study its aseismic performance

a controllable arrester model with and without shock absorbers is established to calculate and analyse of deformation and stress distribution under static loading and aseismic loading

then evaluating the safety performance. Calculation results show that the wind load has little effect on the overall displacement of the arrester structure. The displacement of the top of the controlled arrester with and without the damping device is 32.8 mm and 3.28 mm respectively. The shock absorber achieves damping control by providing additional damping to the device

which results in the consistency of the frequency distribution between the structures with and without shock absorber. When the acceleration is 0.3 g

the total displacement of the shock absorber and the maximum stress of the porcelain sleeve are 49.35 mm and 4.48 MPa

respectively. The total displacement of the shock absorber and the maximum stress of the porcelain sleeve are 210.06 mm and 15.1 MPa

respectively. Under the action of earthquake acceleration

when the arrester is installed with shock absorber

the aseismic performance is improved obviously

and the stress at the root of the lightning arrester can be reduced to a great extent under earthquake conditions

the reliability of controllable arresters has been improved.