High-efficiency MOSFET-based MMC design for LVDC distribution systems

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Zhong, Y. and Roscoe, N. and Holliday, D. and Lim, T.C. and Finney, S.J. (2017) High-efficiency MOSFET-based MMC design for LVDC distribution systems. IEEE Transactions on Industry Applications. ISSN 0093-9994 (https://doi.org/10.1109/TIA.2017.2754481)

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Abstract

LVDC distribution networks have the potential to release larger capacity without having to upgrade the existing cables. One of the main challenges of LVDC networks is the extra customer-end DC-AC conversion stage. This paper proposes and evaluates a 5-level Si MOSFET-based MMC as a promising alternative to the conventional 2-level IGBT-based converter. This is due to the comparatively higher efficiency, power quality and reliability, and reduced EM emissions. A comprehensive analysis of a Si MOSFET 5-level MMC converter design is performed to investigate the suitability of the topology for LVDC applications. Detailed theoretical analysis of the 5-level MMC is presented, with simulated and experimental results to demonstrate circuit performance. To suppress the AC circulating current, especially the dominant 2nd harmonics, this paper presents a double line-frequency PI with orthogonal imaginary axis control method. Comparison of simulation and experimental results with those for double line-frequency PR control shows that the proposed PI controller has better performance. In addition, it is simpler to implement and more immune to sampling/discretisation errors.

ORCID iDs

Zhong, Y., Roscoe, N. ORCID logoORCID: https://orcid.org/0000-0001-6315-0995, Holliday, D. ORCID logoORCID: https://orcid.org/0000-0002-6561-4535, Lim, T.C. and Finney, S.J.;
  • Item type:Article
    ID code:61821
    Dates:
    Date
    Event
    20 September 2017
    Published
    19 August 2017
    Accepted
    Notes:© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component 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:21 Sep 2017 14:22
    Last modified:27 Dec 2024 01:33
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/61821
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