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Energies 2017, 10(4), 581; doi:10.3390/en10040581

Double-Carrier Phase-Disposition Pulse Width Modulation Method for Modular Multilevel Converters

1
College of Electrical and Information Engineering, Hunan University, Changsha 410082, China
2
School of Information Science and Engineering, Central South University, Changsha 410083, China
3
Department of Energy Technology, Aalborg University, Aalborg East DK-9220, Denmark
*
Author to whom correspondence should be addressed.
Academic Editor: Gabriele Grandi
Received: 12 February 2017 / Revised: 10 April 2017 / Accepted: 20 April 2017 / Published: 23 April 2017
(This article belongs to the Special Issue Distribution Power Systems and Power Quality)
View Full-Text   |   Download PDF [3707 KB, uploaded 24 April 2017]   |  

Abstract

Modular multilevel converters (MMCs) have become one of the most attractive topologies for high-voltage and high-power applications. A double-carrier phase disposition pulse width modulation (DCPDPWM) method for MMCs is proposed in this paper. Only double triangular carriers with displacement angle are needed for DCPDPWM, one carrier for the upper arm and the other for the lower arm. Then, the theoretical analysis of DCPDPWM for MMCs is presented by using a double Fourier integral analysis method, and the Fourier series expression of phase voltage, line-to-line voltage and circulating current are deduced. Moreover, the impact of carrier displacement angle between the upper and lower arm on harmonic characteristics is revealed, and further the optimum displacement angles are specified for the circulating current harmonics cancellation scheme and output voltage harmonics minimization scheme. Finally, the proposed method and theoretical analysis are verified by simulation and experimental results. View Full-Text
Keywords: modular multilevel converter; double-carrier phase-disposition pulse width modulation; double Fourier integral analysis; harmonic characteristic; carrier displacement angle modular multilevel converter; double-carrier phase-disposition pulse width modulation; double Fourier integral analysis; harmonic characteristic; carrier displacement angle
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MDPI and ACS Style

Zhou, F.; Luo, A.; Li, Y.; Xu, Q.; He, Z.; Guerrero, J.M. Double-Carrier Phase-Disposition Pulse Width Modulation Method for Modular Multilevel Converters. Energies 2017, 10, 581.

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