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: https://orcid.org/0000-0001-5482-3609, Booth, Campbell D. ORCID: https://orcid.org/0000-0003-3869-4477, Egea Alvarez, Agusti ORCID: https://orcid.org/0000-0003-1286-6699, Dyśko, Adam ORCID: https://orcid.org/0000-0002-3658-7566, Finney, Stephen J. and Junyent-Ferré, Adrià;-
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Item type: Article ID code: 72887 Dates: DateEvent18 May 2020Published18 May 2020Published Online25 April 2020Accepted22 July 2019SubmittedNotes: © 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: 02 Oct 2024 00:35 URI: https://strathprints.strath.ac.uk/id/eprint/72887