Abstract:This paper describes a control method and the operating performances of modular multilevel converter(MMC) for high-voltage motor drive. The magnitude of capacitor voltage ripples increases when operating frequency decreases. To deal with the significant voltage fluctuation under low frequency conditions, theoretical analysis is presented in this paper, and a new capacitor voltage balancing control strategy is proposed, which is based on carrier phase-shifted sinusoidal pulse width modulation(CPS-SPWM). The simulation results show that MMC works well and capacitor voltages are balanced with the control strategy at low frequency.
刘国伟, 姜齐荣, 魏应冬. 低频率工况下模块化多电平变流器电容电压平衡控制策略[J]. 电工技术学报, 2014, 29(8): 166-172.
Liu Guowei, Jiang Qirong, Wei Yingdong. Study on Capacitor Voltage Balancing Control of Modular Multilevel Converters at Low Frequency. Transactions of China Electrotechnical Society, 2014, 29(8): 166-172.
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