Sequence Pulse Modulation for Voltage Balance in a Cascaded H-Bridge Rectifier

Xu Peng; Xiaoqiong He; Pengcheng Han; Xiaolan Lin; Zeliang Shu; Shibin Gao

Sequence Pulse Modulation for Voltage Balance in a Cascaded H-Bridge Rectifier

Vol. 17, No. 3, pp. 664-673, May 2017

10.6113/JPE.2019.17.3.664

CHBR

Sequence pulse modulation

Voltage balance

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Abstract

With the development of multilevel converters, cascaded single-phase H-bridge rectifiers (CHBRs) has become widely adopted in high-voltage high-power applications. In this study, sequence pulse modulation (SPM) is proposed for CHBRs. SPM is designed to balance the dc-link voltage and maintain the smooth changes of switch states. In contrast to phase disposition modulation, SPM balances the dc-link voltage even after removing the load of one submodule. The operation principle of SPM is deduced, and the unbalance degree of SPM is analyzed. All the proposed approaches are experimentally verified through a prototype of a four-module (nine-level) CHBR. Conclusions are drawn in accordance with the results of SPM and its imbalance degree analysis.

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Cite this article

[IEEE Style]

X. Peng, X. He, P. Han, X. Lin, Z. Shu, S. Gao, "Sequence Pulse Modulation for Voltage Balance in a Cascaded H-Bridge Rectifier," Journal of Power Electronics, vol. 17, no. 3, pp. 664-673, 2017. DOI: 10.6113/JPE.2019.17.3.664.

[ACM Style]

Xu Peng, Xiaoqiong He, Pengcheng Han, Xiaolan Lin, Zeliang Shu, and Shibin Gao. 2017. Sequence Pulse Modulation for Voltage Balance in a Cascaded H-Bridge Rectifier. Journal of Power Electronics, 17, 3, (2017), 664-673. DOI: 10.6113/JPE.2019.17.3.664.