System-Level Analysis on the Effects of Seismic on Reliability of Rectifier Transformer for ITER Poloidal Field Converter Unit

This article proposed a seismic analysis method for rectifier transformer of International Thermonuclear Experimental Reactor (ITER) poloidal field converter based on response spectrum. The seismic response of structure under specific seismic excitation is evaluated by using the earthquake spectrum of seismic level one (SL-1) with damping factor of 2% provided by ITER. The results show the maximum deformation and stress are 31.18 mm (control cubicle) and 181.62 MPa (support of oil tank), respectively, which are less than the allowable stress. In addition, the simulation analysis is introduced in detail and the results as the displacements, stresses, and reactive forces are also presented. The seismic analysis method proposed in this article provided a reference for the seismic design of rectifier transformer of ITER polar field converter, and also provides ideas for the seismic design of similar large electrical equipment.