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The Controller Hardware_in_the_loop (CHIL) simulation is gaining popularityas a cost_effective, efficient, and reliable tool in the design and developmentprocess of fast_growing electrified transportation power converters. However,it is challenging to implement the conventional CHIL simulations on the railwaypower converters with complex topologies and high switching frequencies due tostrict real_time constraints. Therefore, this paper proposes an event-basedsynchronization CHIL (ES_CHIL) framework for high_fidelity simulation of theseelectrified railway power converters. Different from conventional CHILsimulations synchronized through the time axis, the ES_CHIL framework issynchronized through the event axis. Therefore, it can ease the real_timeconstraint and broaden the upper bound on the system size and switchingfrequency. Besides, models and algorithms with higher accuracy, such as thediode model with natural commutation processes, can be used in the ES-CHILframework. The proposed framework is validated for a 350 kW wireless powertransformer system containing 24 fully controlled devices and 36 diodes bycomparing it with Simulink and physical experiments. This research improves thefidelity and application range of the power converters CHIL simulation. Thus,it helps to accelerate the prototype design and performance evaluation processfor electrified railways and other applications with such complex converters.

An Event-Based Synchronization Framework for Controller Hardware-in-the-loop Simulation of Electric Railway Power Electronics Systems