级联储能变换器直流链纹波电流的抑制策略

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Abstract The energy storage system can not only be used as power source but also the load, so it plays a vital role of bidirectional adjustment in microgrid. With the application of energy storage technology in microgrid, the multilevel cascade converter as a new power condition system has been researched widely. In the battery energy storage system based on multilevel cascade converter, the DC link current of H-bridge contains DC component and ripple components. The ripple current will bring bad effects to the battery energy system. The paper researches on the components of H-bridge DC link current and the propagation characteristics of ripple current based on the H-bridge equivalent circuit model of ripple current. Then the paper proposes a circuit topology of the cascade converter with DC active filter, and elaborates the control strategies for suppressing H-bridge DC ripple current by using DC active filter. Finally, the simulation results are provided to show the effectiveness of the scheme.

Key words： Microgrid energy storage multilevel cascade converter DC link ripple current DC active filter

Received: 10 December 2013 Published: 18 June 2014

PACS:

TM464

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	Ding Ming
	Chen Zhong
	Chen Xudong

Cite this article:

Ding Ming,Chen Zhong,Chen Xudong. A Scheme for Suppressing DC Ripple Current of Cascade <br/>Converter for Energy Storage System[J]. Transactions of China Electrotechnical Society, 2014, 29(2): 46-54.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2014/V29/I2/46

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