An Improved Phase-Disposition Pulse Width Modulation Method for Hybrid Modular Multilevel Converter

Fayun Zhou, Xinxing Xiang (), Fujun Ma, Yichao Wang, Fangyuan Zhou and Peng Peng
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Fayun Zhou: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Xinxing Xiang: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Fujun Ma: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Yichao Wang: College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
Fangyuan Zhou: School of Automation, Central South University, Changsha 410083, China
Peng Peng: Hunan Zhongke Electric Co., Ltd., Yueyang 414000, China

Energies, 2023, vol. 16, issue 3, 1-25

Abstract: The hybrid modular multilevel converter (MMC) consisting of half-bridge submodules (HBSMs) and full-bridge submodules (FBSMs) is a promising solution for overhead lines high-voltage direct current systems (HVDC) due to the advantages of direct current short circuit fault ride-through (DC-FRT) capability. This paper proposes an improved phase-disposition pulse width modulation (PDPWM) method for the hybrid modular multilevel converter. The number of carriers can be reduced from 3 N ( N is the number of submodules in each arm) to 6. The theoretical harmonic analysis of the improved PDPWM method for hybrid MMC is performed by using double Fourier integral analysis. The influence of three carrier displacement angles between HBSMs and FBSMs in the upper and lower arms on harmonic characteristics is investigated. The output voltage harmonics minimization PDPWM scheme and circulating current harmonics cancellation PDPWM scheme can be achieved by selecting the optimum carrier displacement angles, respectively. The proposed method for hybrid MMC is verified by the simulation and experimental results.

Keywords: hybrid modular multilevel converter; phase-disposition pulse width modulation; carrier displacement angles; theoretical harmonic analysis (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: 2023
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