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.
[1] Rodriguez J, Lai Jih-Sheng, Peng Fangzheng. Multilevel inverters: a survey of topologies, controls, and applications[J]. IEEE Transactions on Industrial Electronics, 2002, 49(4): 724-738. [2] Bernet S. Recent developments of high power converters for industry and traction applications[J]. IEEE Transac- tions on Power Electronics, 2000, 15(6): 1102-1117. [3] Wang Chenchen, Li Yondong. A survey on topologies of multilevel converters and study of two novel topologies[C]. 6th IEEE International Power Electronics and Motion Control Conference, IPEMC '09, 2009: 860-865. [4] Lesnicar A, Marquardt R. An innovative modular multilevel converter topology suitable for a wide power range[C]. IEEE Power Tech Conference Procee- dings, Bologna, 2003: 3-6. [5] Allebrod S, Hamerski R, Marquardt R. New transformerless, scalable modular multilevel converters for HVDC-transmission[C]. IEEE Power Electronics Specialists Conference, 2008: 174-179. [6] Glinka M. Prototype of multiphase modular- multilevel- converter with 2MW power rating and 17-level- output-voltage[C]. IEEE 35th Annual Power Electronics Specialists Conference, PESC 04, 2004: 2572-2576. [7] Glinka M, Marquardt R. A new AC/AC multilevel converter family[J]. IEEE Transactions on Industrial Electronics, 2005, 52(3): 662-669. [8] Hiller M, Krug D, Sommer R. A new highly modular medium voltage converter topology for industrial drive applications[C]. 13th European Conference on Power Electronics and Applications, 2009: 1-10. [9] Antonopoulos A, Ilves K A X, et al. On interaction between internal converter dynamics and current control of high-performance high-power AC motor drives with modular multilevel converters[C]. IEEE Energy Conversion Congress and Exposition(ECCE), 2010: 4293-4298. [10] Hagiwara M, Nishimura K, Akagi H. A medium- voltage motor drive with a modular multilevel PWM inverter[J]. IEEE Transactions on Power Electronics, 2010, 25(7): 1786-1799. [11] Korn A J, Winkelnkemper M, Steimer P. Low output frequency operation of the modular multi-level converter[C]. IEEE Energy Conversion Congress and Exposition(ECCE), 2010: 3993-3997.
2014, Vol. 29 
