Modulated low fault-energy protection scheme for DC smart grids

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Li, Chunpeng and Rakhra, Puran and Norman, Patrick and Niewczas, Pawel and Burt, Graeme and Clarkson, Paul (2019) Modulated low fault-energy protection scheme for DC smart grids. IEEE Transactions on Smart Grid. ISSN 1949-3053 (https://doi.org/10.1109/TSG.2019.2917540)

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Abstract

DC smart grids enabled by the integration of advanced power electronic converters (PEC) can ease the integration and control of distributed renewable energy resources, electric vehicles and energy storage systems. However, these highly flexible power systems introduce many challenges when considering the design of reliable, plug-and-play protection that does not rely on dedicated communications infrastructure for device coordination. One particularly difficult challenge is the management of DC-side filter capacitor discharge during short-circuit faults where the large peak fault-current produced can permanently damage exposed semiconductor components within the converter. One solution is to ensure that the trip-time of DC protection devices is sufficiently rapid (sub-millisecond) to guarantee that fault-current is blocked prior to reaching destructive magnitudes. However, such high-speed protection devices do not offer much margin for effective selectivity with downstream devices due to the narrow time window of operation. Accordingly, this paper proposes a non-unit protection scheme for future large-scale DC smart grid applications that increases this time-window of operation to enable improved selectivity whilst retaining a lower level of energy dissipated in the fault. Reliable protection coordination is demonstrated on a DC radial network and is realized using conventional millisecond trip-time devices, and a single solid-state microsecond trip-time device.

ORCID iDs

Li, Chunpeng ORCID logoORCID: https://orcid.org/0000-0003-3650-0480, Rakhra, Puran ORCID logoORCID: https://orcid.org/0000-0001-9811-3027, Norman, Patrick ORCID logoORCID: https://orcid.org/0000-0001-5577-1281, Niewczas, Pawel ORCID logoORCID: https://orcid.org/0000-0003-3291-1725, Burt, Graeme ORCID logoORCID: https://orcid.org/0000-0002-0315-5919 and Clarkson, Paul;
  • Item type:Article
    ID code:68000
    Dates:
    Date
    Event
    17 May 2019
    Published
    17 May 2019
    Published Online
    22 April 2019
    Accepted
    24 July 2018
    Submitted
    Notes:© 2019 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:23 May 2019 10:30
    Last modified:16 Dec 2024 02:07
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/68000
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