改进型模块化多电平高压变频器及其控制方法

doi:10.19595/j.cnki.1000-6753.tces.180515

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Abstract Modular multilevel converter (MMC) has been widely used due to its modularity, easy-to-expand structure and ideal sinusoidal output waveforms for high voltage direct current (HVDC) transmission. However, for high-voltage motor drive applications, MMC faces the problem of large capacitor voltage ripples at low speeds. A hybrid MMC (HMMC) topology has attracted attention because of its good capacitor voltage ripple suppression characteristics. This paper analyzes the characteristics of HMMC capacitor voltage ripple. The expressions of fundamental and second order components of capacitor voltage ripples are derived. Then the capacitor selection method is presented. In addition, from the aspects of the internal energy and circulation control of the HMMC and the external motor drive, this paper proposes an overall control method to efficiently and stably realize the high-voltage motor variable-frequency drives. The effectiveness of the proposed method is further verified by simulations and experiments.

Key words： Modular multilevel converter (MMC) high-voltage drive hybrid topology capacitor voltage ripple analysis control method

Received: 08 April 2018 Published: 03 September 2018

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TM46

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	Articles by authors
	Zhou Shaoze
	Li Binbin
	Wang Jingkun
	Xu Dianguo

Cite this article:

Zhou Shaoze,Li Binbin,Wang Jingkun等. A Hybrid Modular Multilevel High-Voltage Converter and Its Control Method[J]. Transactions of China Electrotechnical Society, 2018, 33(16): 3772-3781.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180515 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I16/3772

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