Abstract：The multilevel current source rectifier (MCSR) consists of multiple paralleled three-phase current source bridge rectifiers. If the traditional space vector pulse width modulation (SVPWM) method is used, it involves a lot of trigonometric functions, which affects the data processing efficiency of the controller. Therefore, a space vector pulse width modulation method based on three-phase MCSR in 60° coordinate system is proposed, and the calculation process of basic vector and action time is simplified effectively. At the same time, a method for reasonably distributing the switching time and sequence of the redundant switch is proposed to balance dc current. Thus, the current balance inductance at each switching period withstands a zero average voltage, thereby solving the current imbalance problem of the balance inductance and realizing the automatic average of DC current. Finally, the simulation and experiment of three-phase 5L-CSR were carried out to verify the proposed method.
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2020, Vol. 35 
