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A novel method to improve output voltage quality of grid-connected Cascaded H-Bridge Multilevel converter with Phase-Shifted PWM and serial bus communication

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4 Author(s)
Seong-Yong Lee ; Power Conversion Res. Dep''t, Hyundai Heavy Ind. Co., Ltd., Yongin, South Korea ; Myung-Ho Woo ; Jong-Kyu Kim ; Seung-Pyo Ryu

This paper describes a novel method to improve output voltage quality of grid-connected Cascaded H-Bridge Multilevel (CHBM) converter with Phase-Shifted PWM (PSPWM) and serial bus communication. For practical design of CHBM converter, serial bus communication enables to control power-cells of flexible number. Although a frequency of updating reference voltage is limited by serial bus communication speed, the output voltage quality of cascaded power-cells can be improved by proposed method. It provides low distortion of current for grid-connected CHBM converter. The validity of proposed method is verified by simulation and experimental results.

Published in:

Energy Conversion Congress and Exposition (ECCE), 2012 IEEE

Date of Conference:

15-20 Sept. 2012