A Summary of Capacitor Voltage Ripple Suppression Techniques Applied to Modular Multilevel Converters for AC Motor Drives
Wang Ze1, Zhang Kai1, Chen Jimin1, Liao Kaiwen1, Liu Wanxun2
1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China; 2. State Grid Henan Economic Research Institute Zhengzhou 450052 China
Abstract：The main features of modular multilevel converter (MMC) are modularity, fault tolerant ability, voltage and power scalability, low switching frequency, and transformerless grid-connection, which make it to be one of the promising converters for medium to high-voltage, high-power applications. While in AC drive systems, the excessive capacitor voltage ripples threaten the power devices and deteriorate the output waveforms, thus hampers the application of the MMC in AC drives. This paper summarizes the capacitor voltage ripple reduction and suppression schemes for variable-frequency drive applications in recent years, and classifies them into three categories. The pros and cons of some schemes are thoroughly reviewed and compared. From the perspective of industrial application, the optimal ripple suppression schemes for different occasions are judged. Moreover, future research topics are discussed.
王泽, 张凯, 陈济民, 廖凯文, 刘万勋. 应用于模块化多电平变频器的电容电压脉动抑制技术综述[J]. 电工技术学报, 2018, 33(16): 3756-3771.
Wang Ze, Zhang Kai, Chen Jimin, Liao Kaiwen, Liu Wanxun. A Summary of Capacitor Voltage Ripple Suppression Techniques Applied to Modular Multilevel Converters for AC Motor Drives. Transactions of China Electrotechnical Society, 2018, 33(16): 3756-3771.
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