Research on the Seismic Performance of 40.5kV Gas Insulated Metal Enclosed Switchgear

Abstract The construction condition of rail transit power supply system is relatively bad in mountainous area, especially in high altitude area, and the requirement of seismic performance of power supply system equipment is also increasing. Taking 40.5 kV gas-insulated switchgear (GIS) switchgear as the research object, using finite element analysis software, establishing the three-dimensional finite element calculation model, and the static analysis, modal analysis and response spectrum analysis under self-weight load are carried out. The calculation results show that the GIS switchgear has good seismic performance, and the seismic performance under 0.5g seismic excitation meets the requirements of the specification. Furthermore, the comprehensive analysis not only confirms the robust structural integrity of the 40.5 kV GIS switchgear under extreme conditions but also highlights its resilience against seismic events. The utilization of advanced finite element analysis software allows for a precise simulation of the complex dynamic responses under various loading scenarios, ensuring that the design incorporates sufficient margins to withstand even unforeseen seismic activities. This guarantees the continuous and reliable operation of the rail transit power supply system, which is crucial for maintaining the mobility and connectivity of communities in mountainous and high-altitude regions. Additionally, the findings reinforce the importance of rigorous testing and analysis in the design phase, setting a benchmark for future power supply system equipment development in challenging environments.