Continuous operation of radial multi-terminal HVDC systems under DC fault

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Li, Rui and Xu, Lie and Holliday, Derrick and Page, Frederick and Finney, Stephen J. and Williams, Barry W. (2016) Continuous operation of radial multi-terminal HVDC systems under DC fault. IEEE Transactions on Power Delivery, 31 (1). pp. 351-361. ISSN 0885-8977 (https://doi.org/10.1109/TPWRD.2015.2471089)

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Abstract

For a large multi-terminal HVDC system, it is important that a DC fault on a single branch does not cause significant disturbance to the operation of the healthy parts of the DC network. Some DC circuit breakers (DCCBs), e.g. mechanical type, have low cost and power loss, but have been considered unsuitable for DC fault protection and isolation in a multi-terminal HVDC system due to their long opening time. This paper proposes the use of additional DC passive components and novel converter control combined with mechanical DCCBs to ensure that the healthy DC network can continue to operate without disruption during a DC fault on one DC branch. Two circuit structures, using an additional DC reactor, and a reactor and capacitor combination, connected to the DC-link node in a radial HVDC system are proposed to ensure over-current risk at the converters connected to the healthy network is minimized before the isolation of the faulty branch by mechanical DCCBs. Active control of DC fault current by dynamically regulating the DC components of the converter arm voltages is proposed to further reduce the fault arm current. Simulation of a radial three-terminal HVDC system demonstrates the effectiveness of the proposed method.

ORCID iDs

Li, Rui ORCID logoORCID: https://orcid.org/0000-0001-8990-7546, Xu, Lie ORCID logoORCID: https://orcid.org/0000-0001-5633-7866, Holliday, Derrick ORCID logoORCID: https://orcid.org/0000-0002-6561-4535, Page, Frederick ORCID logoORCID: https://orcid.org/0000-0001-9757-2889, Finney, Stephen J. ORCID logoORCID: https://orcid.org/0000-0001-5039-3533 and Williams, Barry W.;
  • Item type:Article
    ID code:54239
    Dates:
    Date
    Event
    29 February 2016
    Published
    21 August 2015
    Published Online
    15 August 2015
    Accepted
    Notes:(c) 2016 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:09 Sep 2015 14:20
    Last modified:14 Nov 2024 01:08
    URI:https://strathprints.strath.ac.uk/id/eprint/54239
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