Hybrid cascaded modular multilevel converter with DC fault ride-through capability for HVDC transmission system

Li, Rui and Adam, Grain Philip and Holliday, Derrick and Fletcher, John E. and Williams, Barry W. (2015) Hybrid cascaded modular multilevel converter with DC fault ride-through capability for HVDC transmission system. IEEE Transactions on Power Delivery, 30 (4). pp. 1853-1862. ISSN 0885-8977 (https://doi.org/10.1109/TPWRD.2015.2389758)

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Abstract

A new hybrid cascaded modular multilevel converter for high-voltage dc (HVDC) transmission system is presented. The half-bridge (HB) cells are used on the main power stage and the cascade full-bridge (FB) cells are connected to its ac terminals. The main power stage generates the fundamental voltages with quite low switching frequency, resulting relatively low losses. The cascaded FB cells only attenuate the harmonics generated by the main power stage, without contribution to the power transfer. Thus, the energy storage requirement of the cascaded FB cells is low and the capacitance of FB cells is reduced significantly. Due to the dc fault reverse blocking capability of the cascaded FB cells, the proposed topology can ride-through the pole-to-pole dc fault. In addition the soft restart is achieved after the fault eliminates, without exposing the system to significant inrush current. Besides, the average-value model of the proposed topology is derived, based on which the control strategy is presented. The results show the feasibility of the proposed converter.

ORCID iDs

Li, Rui ORCID logoORCID: https://orcid.org/0000-0001-8990-7546, Adam, Grain Philip ORCID logoORCID: https://orcid.org/0000-0002-1263-9771, Holliday, Derrick ORCID logoORCID: https://orcid.org/0000-0002-6561-4535, Fletcher, John E. and Williams, Barry W.;
  • Item type:Article
    ID code:54323
    Dates:
    Date
    Event
    1 August 2015
    Published
    9 January 2015
    Published Online
    3 January 2015
    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:21 Sep 2015 13:26
    Last modified:11 Nov 2024 10:58
    URI:https://strathprints.strath.ac.uk/id/eprint/54323
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