单相电流型多电平变流器自均流特性

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Abstract The sharing-inductors are used to generate the different current-levels for the single-phase multilevel current-source inverter (MCSI). To keep the intermediate DC-link currents balanced, it is necessary to study the current-balancing characteristics of MCSI. In this paper, according to the connection modes of the sharing-inductors, a kind of single-phase MCSI which has simple circuit structures is introduced. By setting up mathematical expressions of the average-voltage across the sharing-inductors, the natural current-balancing performances of such MCSI are analyzed in detail, and the simulation results are in complete agreement with the theoretical conclusions. In order to improve the harmonic performances of output current at different load conditions, a practicable way to balance the intermediate DC-link current is proposed, which was implemented with automatically choosing the redundant switching-combinations based on the DC-link current feedback. Lastly, the correctness and validity of such control method are verified by the experimental results.

Key words： Multilevel current-source inverter (CSI) topology natural current-balancing harmonics redundant switching-combinations

Received: 15 January 2009 Published: 04 March 2014

PACS:

TM464

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	Articles by authors
	Bao Jianyu
	Bao Weibing
	Zhang Zhongchao

Cite this article:

Bao Jianyu,Bao Weibing,Zhang Zhongchao. Natural Current-Balancing Performance of a Kind of Single-Phase Multi-Level Current-Source Inverter[J]. Transactions of China Electrotechnical Society, 2010, 25(4): 89-94.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2010/V25/I4/89

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