级联整流二维调制多维扩展策略

doi:10.19595/j.cnki.1000-6753.tces.190727

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Abstract As a rectification stage for emerging medium and high voltage power electronic converters,Cascaded H bridge rectifier (CHBR) is the key to the realization of active distribution network interface converters and chain energy storage converters. Two-dimensional modulation (TDM) has apparent advantages in optimizing the DC-bridge voltage balance speed of the two bridges and improving the unbalanced load capacity of the DC bus. However, as the number of cascades increases, the number of degrees of multidimensional modulation increases dramatically, and optimization becomes exceptionally complicated. Based on the two-dimensional voltage balance modulation, a multi-dimensional extended modulation strategy is proposed, and the modulation logic of the extended strategy is simplified so that the two-dimensional voltage balance modulation can be applied to the multi-bridge cascade. After that, the inheritance of multi-dimensional extended modulation strategy to TDM degree of freedom optimization is studied, the DC voltage balance performance of the multi-dimensional extended modulation strategy and the TDM strategy and the main factors affecting the multi-dimensional extended modulation balance performance are analyzed and compared in the CHBR unity power factor operation from in theory. Finally, the experiment results from the prototype test are given, which verified the validity and superiority of the theory.

Key words： Cascade rectifier two-dimensional modulation multi-dimensional modulation voltage balance

Received: 17 June 2019

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TM46

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	Zhang Guopeng
	Jia Zan
	Tao Haijun
	Zheng Zheng
	Wang Cong

Cite this article:

Zhang Guopeng,Jia Zan,Tao Haijun等. Multi-Dimensional Modulation for Cascaded H-Bridge Rectifier Based on Two-Dimensional Modulation[J]. Transactions of China Electrotechnical Society, 2020, 35(15): 3224-3234.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.190727 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I15/3224

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