Volume 5 Number 2 (Apr. 2013)
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IJCEE 2013 Vol.5(2): 196-200 ISSN: 1793-8163
DOI: 10.7763/IJCEE.2013.V5.694

Study on Capacitor Voltage Balancing Control of Modular Multilevel Converter at Low Frequency

Guowei Liu, Qirong Jiang, and Yingdong Wei
Abstract—This paper describes a control method and the operating performances of Modular Multilevel Converter (MMC) for high-voltage motor drive. The magnitude of capacitor voltage ripples increases when operating frequency decreases. To deal with the significant voltage fluctuation under low frequency conditions, theoretical analysis is presented in this paper, and a new capacitor voltage balancing control strategy is proposed, which is based on carrier phase-shifted sinusoidal pulse width modulation (CPS-SPWM). The simulation results show that MMC works well and capacitor voltages are balanced with the control strategy at low frequency.

Index Terms—At low frequency, capacitor voltage balancing control, CPS-SPWM, high-voltage motor drive, MMC.

The authors are with the Department of Electrical Engineering, Tsinghua University, Beijing 100084, China. (e-mails: liuguowei_cn@yahoo.cn, qrjiang@tsinghua.edu.cn, wyd@mail.tsinghua.edu.cn)

Cite:Guowei Liu, Qirong Jiang, and Yingdong Wei, "Study on Capacitor Voltage Balancing Control of Modular Multilevel Converter at Low Frequency," International Journal of Computer and Electrical Engineering vol. 5, no. 2, pp. 196-200, 2013.

General Information

ISSN: 1793-8163
Frequency: Semiyearly
Editor-in-Chief: Prof. Yucong Duan
Abstracting/ Indexing: EI (INSPEC, IET), Ulrich's Periodicals Directory, Google Scholar, EBSCO, Engineering & Technology Digital Library, ProQuest, and Electronic Journals Library
E-mail: ijcee@iap.org

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