Design of Parallel Auxiliary Converter with Different Capacity Based on Flexible Marshalling EMUs

With the development and progress of high-speed railway and rail transit equipment technology, EMUs play an increasingly important role in railway transportation. In order to improve the flexibility of EMUs operation, more and more attention has been paid to the flexible marshalling technology of EMUs. Aiming at the apply problem of flexible marshalling of EMUs, this paper puts forward an auxiliary power supply system based on flexible marshalling of EMUs, introduces the power supply mode and load distribution mode. At the same time, this paper designs a parallel control strategy of auxiliary converters with different capacities based on adaptive improved droop control, which realizes the proportional allocation of active and reactive power according to the capacity of the auxiliary converter. The effectiveness and accuracy of the control strategy are verified by Matlab simulation and experiment.