CONTROL STRATEGY RESEARCH AND SIMULATION FOR MMC BASED ON PDSPWM

Modular multilevel converter was hot in the research field of high-voltage power converter, for its advantages of small switching loss, independent device tandem technology. Then, the principles of MMC for the PD-SPWM was briefly analyzed, and the balance control of the upper and lower arms voltage on the basic of the capacitor voltage sequencing method was proposed. The MMC three phase independent inverter based on PD-SPWM is simulated by Matlab/Simulink software. The results show that PD-SPWM method with good output characteristics.