Cascaded H-bridge Type Power Electronic Transformer Electromagnetic Interference Study Based on Parallel Simulation

Power electronic converter (Power Electronic Transformer, PET) is widely used in power systems, so the research on PET electromagnetic disturbance (Electro Magnetic Interference, EMI) cannot be ignored. PET consists of many insulated gate bipolar transistors (Insulate-Gate Bipolar Transistor, IGBT). A large number of converter levels will cause problems such as small simulation steps and long simulation times. To solve the above problems, firstly, the IGBT and its anti-parallel diodes are modeled by an 8-node model to reduce the complexity of the system; secondly, after dividing the model into fine-grained models, CUDAC coding is used to realize the parallel operation of the system on the graphics processing unit (Graphics Processing Units, GPU). Finally, the feasibility of the proposed method is compared with the PSCAD simulation results.