Analysis the cirulating current of parallel converters for traction system with long stator linear synchronous motor

This paper analyzes the circulating current of parallel three-level NPC inverters in the transportation traction system with long stator linear synchronous motor, presents the modeling, and provides an effective and robust control strategy. Parallel operation of inverters is an efficient way to enhance the capacity and reliability of inverter systems and convenient for modularization. The provided strategy in this paper is equipped with dual-current loop. The result of the simulation validates the favorable property of the proposed strategy. The work of this paper provides theoretical basis and simulation for the optimized design of parallel inverters system.