A hybrid modular multilevel converter for medium-voltage variable-speed motor drives

Li, Binbin and Zhou, Shaoze and Xu, Dianguo and Finney, Stephen J. and Williams, Barry W. (2017) A hybrid modular multilevel converter for medium-voltage variable-speed motor drives. IEEE Transactions on Power Electronics, 32 (6). 4619 - 4630. ISSN 0885-8993 (https://doi.org/10.1109/TPEL.2016.2598286)

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Abstract

Modular multilevel converters (MMC) have revolutionized the voltage-sourced converter-based high-voltage direct current transmission, but not yet got widespread application in medium-voltage variable-speed motor drives, because of the large capacitor voltage ripples at low motor speeds. In this paper, a novel hybrid MMC topology is introduced, which significantly reduces the voltage ripple of capacitors, particularly at low motor speeds. Moreover, this topology does not introduce any motor common-mode voltage; as a result, there are no insulation and bearing current problems. Additionally, the current stress can remain at rated value throughout the whole speed range; thus, no device needs to be oversized and converter efficiency can be ensured. Operating principle of this hybrid topology is explained, and control schemes are also developed. Validity and performance of the proposed topology are verified by simulation and experimental results.

  • Item type:Article
    ID code:60040
    Dates:
    Date
    Event
    30 June 2017
    Published
    4 August 2016
    Published Online
    1 August 2016
    Accepted
    Notes:(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:03 Mar 2017 10:42
    Last modified:08 Apr 2024 23:23
    URI:https://strathprints.strath.ac.uk/id/eprint/60040
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