Seismic performance evaluation of UHV valve

It is very important to estimate the seismic performance of UHV (ultra high voltage) converter valve scientifically and rationally for the seismic safety protection of converter station. However, it presents a challenge due to the structural complexity of UHV converter valve. There is also a lack of research on the interaction between the valve and other important interconnection equipment, which leads to inadequate seismic risk assessment of the UHV valve. For considering the connecting interaction between UHV converter valve and bushing of converter transformer in valve side, the finite element model of the overall system of valve-valve hall-converter transformer is established. The main seismic vulnerability indicators of UHV converter valve are analyzed, including stress of suspension insulator, the relative displacement between converter valve inlet/outlet position and converter transformer bushing, and displacement in the bottom of the valve. It provides the reference and suggestion for the research on seismic safety protection technology of the converter valve in UHVDC (ultra high voltage direct current) power transmission project.