一种基于桥臂耦合电感的自然限流型模块化多电平换流器

doi:10.19595/j.cnki.1000-6753.tces.L80475

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Abstract The circulating current, the DC current fluctuation and DC fault current suppressing are important issues for modular multilevel converter (MMC). In order to enhance the suppressing effect of the system on the above three, the arm coupling inductor based natural current limiting MMC (ACINCL-MMC) is proposed in this paper. The operation principle analysis of ACINCL-MMC is carried out firstly. Based on the mathematical modeling of both the AC side and DC side, the relationship between the arm inductor coupling degree and the circulating current, the DC current fluctuation and the DC fault current is studied. The natural current limiting effect of arm coupling inductor is analyzed in detail. Moreover, it further reveals the possibility of using arm coupling inductor instead of DC smoothing reactance. Finally, simulation results show the effectiveness of the proposed theory.

Key words： Modular multilevel converter arm coupling inductor natural current limiting circulating current fault current

Received: 28 June 2018 Published: 15 February 2019

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TM76

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	Wang Youyun
	Yang Xiaofeng
	Li Zejie
	Xue Yao
	Chen Bowei

Cite this article:

Wang Youyun,Yang Xiaofeng,Li Zejie等. Arm Coupling Inductor Based Natural Current Limiting Modular Multilevel Converter[J]. Transactions of China Electrotechnical Society, 2018, 33(zk2): 479-488.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80475 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/Izk2/479

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