混合钳位型四电平和五电平逆变器拓扑结构和控制策略

doi:10.19595/j.cnki.1000-6753.tces.161136

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Abstract A novel hybrid-clamped four-level inverter topology and its derived five-level topology are presented in this paper. The proposed topologies can improve the voltage levels, reduce the number of devices in the diode-clamped and flying capacitor multilevel converters, and avoid the series connection of switches in the five-level active-neutral-point-clamped converter. To achieve the voltage balancing of DC-link capacitors and flying capacitors, a modified PWM method is proposed. This PWM method can regulate the central DC-link capacitor and flying capacitor voltages by adjusting the duty cycles of PWM signals slightly. The upper and lower DC-link capacitor voltages are balanced by zero-sequence voltage injection. An experimental prototype is built up, and the experimental results verify this topology.

Key words： Hybrid-clamped multilevel converter capacitor voltage balancing zero-sequence voltage phase-shifted PWM

Received: 21 July 2016 Published: 31 January 2018

PACS:

TM464

Fund:国家自然科学基金青年基金资助项目（51407101）

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	Articles by authors
	Wang Kui
	Zheng Zedong
	Xu Lie
	Li Yongdong

Cite this article:

Wang Kui,Zheng Zedong,Xu Lie等. The Topologies and Control of Hybrid-Clamped Four-Level and Five-Level Inverters[J]. Transactions of China Electrotechnical Society, 2018, 33(2): 353-360.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.161136 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I2/353

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