Hybrid multilevel converter with cascaded H-bridge cells for HVDC applications : operating principle and scalability

Adam, G.P. and Abdelsalam, Ibrahim Abdallah and Ahmed, Khaled Hani and Williams, Barry W. (2015) Hybrid multilevel converter with cascaded H-bridge cells for HVDC applications : operating principle and scalability. IEEE Transactions on Power Electronics, 30 (1). pp. 65-77. ISSN 0885-8993 (https://doi.org/10.1109/TPEL.2014.2303111)

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Abstract

Hybrid multilevel converters are contemplated in an attempt to optimize the performance of voltage source converters in terms of magnitude of semiconductor losses and converter footprint, and to achieve additional features such as dc short circuit proof, which is essential for a high integrity multiterminal HVDC grid. Therefore, this paper considers an emerging hybrid cascaded converter that offers the dc side short circuit proof feature at reduced loss and footprint compared to the existing multilevel and other hybrid converters. Its operating principle, modulation, and capacitor voltage balancing strategies are described in detail. Furthermore, hybrid converter scalability to high voltage applications is investigated. The validity of the modulation and capacitor voltage strategy presented are confirmed using simulation and experimentation. The hybrid cascaded converter is extendable to a large number of cells, making it applicable to high voltage applications, and operation is independent of modulation index and power factor. On these ground, the converter is expected to be applicable for both real and reactive power applications.

ORCID iDs

Adam, G.P. ORCID logoORCID: https://orcid.org/0000-0002-1263-9771, Abdelsalam, Ibrahim Abdallah, Ahmed, Khaled Hani and Williams, Barry W.;
  • Item type:Article
    ID code:53866
    Dates:
    Date
    Event
    30 January 2015
    Published
    26 August 2014
    Published Online
    10 January 2014
    Accepted
    Notes:(c) 2015 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:24 Jul 2015 14:43
    Last modified:20 Nov 2024 01:11
    URI:https://strathprints.strath.ac.uk/id/eprint/53866
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