Review of technologies for DC grids - power conversion, flow control and protection

Adam, Grain Philip and Kristain Vrana, Till and Li, Rui and Li, Peng and Burt, Graeme and Finney, Stephen (2019) Review of technologies for DC grids - power conversion, flow control and protection. IET Power Electronics, 12 (8). pp. 1851-1867. ISSN 1755-4543 (https://doi.org/10.1049/iet-pel.2018.5719)

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Abstract

Abstract: This article reviews dc transmission technologies for future power grids. The article emphasizes the attributes that each technology offers in terms of enhance controllability and stability, resiliency to ac and dc faults, and encourage increased exploitations of renewable energy resources (RERs) for electricity generation. Discussions of ac/dc and dc/dc converters reveal that the self-commutated dc transmission technologies are critical for better utilization of large RERs which tend to be dispersed over wide geographical areas, and offer needed controllability for operation of centralized and decentralized power grids. It is concluded that the series power flow controllers have potential to restrict the expensive isolated dc/dc converters to few applications, in which the prevention of dc fault propagation is paramount. Cheaper non-isolated dc/dc converters offer dc voltage tapping and matching and power regulation but they are unable to prevent pole-shifting during pole-to-ground dc fault. To date hybrid dc circuit breakers target dc fault isolation times ranging from 3ms to 5ms; while the resonance-based dc circuit breakers with forced current zeros target dc fault clearance times from 8ms to 12.5ms.

  • Item type:Article
    ID code:69668
    Dates:
    Date
    Event
    18 July 2019
    Published
    4 March 2019
    Accepted
    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:05 Sep 2019 15:21
    Last modified:18 Apr 2024 00:25
    URI:https://strathprints.strath.ac.uk/id/eprint/69668
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