A new fast-acting backup protection strategy for embedded MVDC links in future distribution networks

Hunter, Lewis C. and Booth, Campbell D. and Egea Alvarez, Agusti and Dyśko, Adam and Finney, Stephen J. and Junyent-Ferré, Adrià (2020) A new fast-acting backup protection strategy for embedded MVDC links in future distribution networks. IEEE Transactions on Power Delivery. ISSN 0885-8977 (https://doi.org/10.1109/TPWRD.2020.2995479)

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Abstract

This paper presents a new fast-acting backup protection strategy for future hybrid ac-dc distribution networks. By examining the impedance measured by a distance protection relay measuring from the “ac-side” of the network, a unique characteristic is established for faults occurring on the “dc-side” of an embedded medium-voltage dc (MVDC) link, interconnecting two 33 kV distribution network sections. Based on the identified impedance characteristic, appropriate settings are developed and deployed on a verified software model of a commercially available distance protection relay. To remain stable for ac-side faults, it is found that the tripping logic of the device must be altered to provide correct time grading between standard, ac, protection zones and the fast-acting dc region, which can identify faults on the dc system within 40 ms. An additional confirmatory check is also employed to reduce the likelihood of mal-operation. Trials on a test system derived from an actual distribution network, which employs distance protection, are shown to provide stable operation for both ac-side and dc-side pole-pole and pole-pole-ground faults

ORCID iDs

Hunter, Lewis C. ORCID logoORCID: https://orcid.org/0000-0001-5482-3609, Booth, Campbell D. ORCID logoORCID: https://orcid.org/0000-0003-3869-4477, Egea Alvarez, Agusti ORCID logoORCID: https://orcid.org/0000-0003-1286-6699, Dyśko, Adam ORCID logoORCID: https://orcid.org/0000-0002-3658-7566, Finney, Stephen J. and Junyent-Ferré, Adrià;
  • Item type:Article
    ID code:72887
    Dates:
    Date
    Event
    18 May 2020
    Published
    18 May 2020
    Published Online
    25 April 2020
    Accepted
    22 July 2019
    Submitted
    Notes:© 2020 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:24 Jun 2020 11:38
    Last modified:11 Nov 2024 12:44
    URI:https://strathprints.strath.ac.uk/id/eprint/72887
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