Hybrid modular multilevel converter with reduced three-level cells in hvdc transmission system

Li, Rui and Wu, Jing and Yao, Liangzhong and Li, Yan and Williams, Barry; (2016) Hybrid modular multilevel converter with reduced three-level cells in hvdc transmission system. In: 2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia). IEEE, CHN. ISBN 9781509012107 (https://doi.org/10.1109/IPEMC.2016.7512372)

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Abstract

A hybrid MMC with reduced three-level (TL) cells is proposed. As well as the dc fault blocking capability, the proposed hybrid MMC provides the benefits of: lower conduction losses; fewer diode and switching devices, and; fewer shoot-through modes. Guidelines are developed to determine the required number of three-level cells to block a dc-side fault. It is also demonstrated that a further reduction in the number a three-level cells is possible if a rise in cell current and voltage is acceptable. This reduction is investigated. A lower number of three-level cells reduces losses and capital cost further. The hybrid MMC with the reduced number of three-level cells proves to be the most attractive approach compared with other MMCs and hybrid MMCs. The semiconductor count and conduction loss are 92.1% and 90.3% respectively of that of the MMC based entirely on full-bridge cells, without exposing the semiconductors to significant fault currents and over-voltages. The simulation results demonstrate the feasibility of the proposed hybrid converter.

ORCID iDs

Li, Rui ORCID logoORCID: https://orcid.org/0000-0001-8990-7546, Wu, Jing, Yao, Liangzhong, Li, Yan and Williams, Barry;
  • Item type:Book Section
    ID code:58003
    Dates:
    Date
    Event
    22 May 2016
    Published
    18 March 2016
    Accepted
    Notes:© 2016 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:03 Oct 2016 09:11
    Last modified:11 Nov 2024 15:06
    URI:https://strathprints.strath.ac.uk/id/eprint/58003
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