Cascaded Modular Multilevel Converter and Cycloconverter Based Machine Drive System
Cascaded Modular Multilevel Converter and Cycloconverter Based Machine Drive System
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DOI：
10.1109/tie.2022.3169851
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发表时间：
2022
影响因子：
7.7
通讯作者：
Yue Zhang;F. Deng;Jiehua Hou;Pengyuan Jiang;Hanlu Zhang-;Kangshun Zhu;Yihua Hu;S. Vazquez
中科院分区：
文献类型：
--
作者：
Yue Zhang;F. Deng;Jiehua Hou;Pengyuan Jiang;Hanlu Zhang-;Kangshun Zhu;Yihua Hu;S. Vazquez
模块化多电平变换器（MMC）由于电容电压波动大，低速驱动是其面临的挑战之一。本文提出了一种基于MMC和交-交变频器（CCV）的级联电机驱动系统，以确保中压低速电机的稳定运行。MMC为CCV提供中频交流电压，CCV将中频交流输入转换为机器所需的低频交流输出。本文对MMC的工作频率、器件电流应力和子模块电容进行了详细分析。所提出的驱动系统可以在额定负载转矩下工作在零/低频，而SM电容比现有方法小得多。仿真和实验结果验证了该系统的有效性。
Low-speed drive is one of the challenges for modular multilevel converters (MMCs) due to large capacitor voltage fluctuation. In this paper, a cascaded MMC and cycloconverter (CCV) based machine drive system is proposed to ensure stable operation of medium- -voltage and low-speed machine. The MMC provides medium-frequency ac voltage for the CCV, and the CCV converts the medium-frequency ac input to low-frequency ac output required by the machine. Detailed analysis about MMCs operation frequency, device current stress and submodule (SM) capacitance are given in this paper. Proposed drive system can operate at zero/low frequency under rated load torque, while the SM capacitance is much smaller than that in existing methods. Simulation and experimental studies are conducted, and the results verify the effectiveness of proposed system.