The valve-side bushing of converter transformer is a key component in electrical equipment and its safe operation is crucial for the reliability of power system. For exploring the impact of seismic action on the temperature field of the valve side bushing of converter transformer

a detailed finite element simulation model for the ±800 kV converter transformer and bushing system is set up in this paper to develop seismic response analysis of valve side bushing of converter transformer

study the residual deformation and residual stress of lamella contact finger electrical connection structure of the valve side bushing after the seismic

calculate the contact resistance based based on the contact resistance calculation formula of electrical connection structure and analyze temperature variation of the valve side bushing after seismic. The result shows that under the seismic action the contact finger is deformed

the contact stress is decreased and contact resistance is increased. Since the ring-shaped structure of the lamella contact finger results in inconsistency of degrees of deformation of contact finger at different positions

causing distribution difference of the resistance at reach area of the contact finger. The current is concentrated in the area with low resistance

leading to a redistribution of the electrical connection structure and resulting in both overall and partial temperature increases and posing a danger to the thermal stability and power transmission efficiency of the system. The study result reveals the impact of seismic action on the temperature field of the valve-side bushing of converter transformer and provides theoretical basis and technical support for improving seismic design and operation as well as maintenance of converter station.