An active protection scheme for islanded microgrids

Khan, Md Asif Uddin and Hong, Qiteng and Dyśko, Adam and Booth, Campbell; (2021) An active protection scheme for islanded microgrids. In: 15th International Conference on Developments in Power System Protection (DPSP 2020). IEEE, GBR. ISBN 9781839532771 (https://doi.org/10.1049/cp.2020.0020)

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Abstract

The paper proposes a relatively simple active protection strategy incorporating controllers of the inverter for islanded microgrids dominated by inverter based distributed generators (IBDGs) that can overcome well-understood shortcomings in traditional overcurrent protection schemes applied to weak islanded systems. During a fault, the scheme identifies that a fault has occurred and instructs each IBDG in the islanded microgrid to inject specific harmonic components in conjunction with fault current; relays in the network can subsequently detect the presence and location of the fault based on the injected combination of harmonic components. The coordination of relays is achieved through definite time settings, hence communication between the protective relays is not required to operate the scheme. Furthermore, the scheme categorises the protective relays into two groups to isolate the faulty section effectively to cater for bidirectional fault current flow - this is described fully in the paper. The paper presents the structure of the proposed protection scheme along with injection strategy through the control of IBDGs. Different fault scenarios are presented using a realistic microgrid model so that effectiveness of the proposed scheme can be demonstrated in terms of detecting, identifying the faulted section and isolating the fault to ensure dependability, security and selectivity of the microgrid protection scheme.

  • Item type:Book Section
    ID code:81418
    Dates:
    Date
    Event
    9 June 2021
    Published
    12 March 2020
    Published Online
    25 September 2019
    Accepted
    Notes: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:08 Jul 2022 12:19
    Last modified:22 Apr 2024 00:09
    URI:https://strathprints.strath.ac.uk/id/eprint/81418
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