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Analysis on Displacement Angle of Phase-Shifted Carrier PWM for Modular Multilevel Converter

School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China
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Author to whom correspondence should be addressed.
This paper is an extended version of our paper published in 2019 IEEE Energy Conversion Congress and Exposition (ECCE), Baltimore, MD, USA, 2019; pp. 4801–4807.
Energies 2020, 13(24), 6743; https://doi.org/10.3390/en13246743
Received: 18 November 2020 / Revised: 12 December 2020 / Accepted: 17 December 2020 / Published: 21 December 2020
(This article belongs to the Special Issue Power Electronic Converters: Control and Applications)
This paper provides theoretical and experimental discussions on the characteristics of the modular multilevel converter (MMC) when phase-shifted carrier sinusoidal pulse-width modulation (PSC-SPWM) is applied. Harmonic-cancellation characteristics of output voltage and circulating current are analyzed on the basis of a general implementation of PSC-SPWM with two freedom displacement angles. Five available PSC-SPWM schemes with different carrier displacement angles were obtained, and a detailed performance comparison about output voltage and circulating current harmonic characteristics is presented. On the basis of the equivalent circuit with ideal transformer representation of the SMs, capacitor voltages affected by PSC-SPWM schemes are also briefly analyzed. The proposed PSC-SPWM schemes can unify two different cases of odd and even SM situations for output voltage and circulating current harmonic minimization, respectively. Lastly, the optimal schemes for practical MMC application were verified by simulation and experiments on an MMC prototype. View Full-Text
Keywords: modular multilevel converter (MMC); phase-shifted carrier SPWM (PSC-SPWM); displacement angle; harmonic characteristics; capacitor voltage modular multilevel converter (MMC); phase-shifted carrier SPWM (PSC-SPWM); displacement angle; harmonic characteristics; capacitor voltage
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MDPI and ACS Style

Cheng, Q.; Wang, C.; Wang, J. Analysis on Displacement Angle of Phase-Shifted Carrier PWM for Modular Multilevel Converter. Energies 2020, 13, 6743. https://doi.org/10.3390/en13246743

AMA Style

Cheng Q, Wang C, Wang J. Analysis on Displacement Angle of Phase-Shifted Carrier PWM for Modular Multilevel Converter. Energies. 2020; 13(24):6743. https://doi.org/10.3390/en13246743

Chicago/Turabian Style

Cheng, Qian, Chenchen Wang, and Jian Wang. 2020. "Analysis on Displacement Angle of Phase-Shifted Carrier PWM for Modular Multilevel Converter" Energies 13, no. 24: 6743. https://doi.org/10.3390/en13246743

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