An Improved Modulation Strategy Combining Phase Shifted PWM and Phase Disposition PWM for Cascaded H-Bridge Inverters

Muxuan Xiao, Qianming Xu and Honglin Ouyang
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Muxuan Xiao: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Qianming Xu: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Honglin Ouyang: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China

Energies, 2017, vol. 10, issue 9, 1-14

Abstract: Abstract: Multilevel modulation strategy is an important factor affecting the output performance of multilevel converters. In this paper, the relationship between phase-shifted pulse width modulation (PWM) and phase disposition PWM is analyzed, and then an improved hybrid modulation strategy is proposed for cascaded H-bridge. In addition, the implementation method of multilevel discontinuous modulation for an improved modulation strategy is described. The new modulation strategy is optimized to increase the DC link voltage utilization and further improvement in output harmonics by the injection of a common voltage into the reference. Simulation and experiment verify the effectiveness of the proposed modulation strategy.

Keywords: cascaded H-bridge inverter; pulse width modulation; power conversion harmonics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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