单电源自均压九电平逆变器及其调制策略

doi:10.19595/j.cnki.1000-6753.tces.181936

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Abstract In distributed renewable energy generation systems, traditional multi-level inverters have the disadvantages of too many power devices, complicated circuit structure and control strategy. To solve these problems, a single-source nine-level inverter based on switched capacitor structure is proposed, which consists of switched capacitor network, auxiliary bidirectional switch and H-bridge unit. The proposed inverter can generate more output levels with less power devices, moreover, the topology is simple and has the advantage of low output harmonic content. The advantages of capacitor self-voltage-balancing simplify the control algorithm, and the characteristics of single source can broaden its application range. The specific harmonic elimination method is used to modulate the inverter, which reduces the switching frequency of switches and further reduces the harmonic content of the output voltage. Finally, the steady and dynamic performance of the proposed inverter is verified and analyzed by experiments, which proves the correctness and feasibility of the inverter and its modulation strategy.

Key words： Multilevel inverter switched capacitor single supply capacitor self-voltage-balancing

Received: 24 December 2018 Published: 28 February 2020

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TM464

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	Wang Yaoqiang
	Zhou Chenglong
	Li Zhongwen
	Zhang Yun

Cite this article:

Wang Yaoqiang,Zhou Chenglong,Li Zhongwen等. Single-Source Self-Voltage-Balancing Nine-Level Inverter and Its Modulation Strategy[J]. Transactions of China Electrotechnical Society, 2020, 35(4): 817-826.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181936 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I4/817

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