Analysis of voltage source converter-based high-voltage direct current under DC line-to-earth fault
Rafferty, John and Xu, Lie and Morrow, John (2015) Analysis of voltage source converter-based high-voltage direct current under DC line-to-earth fault. IET Power Electronics, 8 (3). 428–438. ISSN 1755-4543 (https://doi.org/10.1049/iet-pel.2014.0302)
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Abstract
DC line faults on high-voltage direct current (HVDC) systems utilising voltage source converters (VSCs) are a major issue for multi-terminal HVDC systems in which complete isolation of the faulted system is not a viable option. Of these faults, single line-to-earth faults are the most common fault scenario. To better understand the system under such faults, this study analyses the behaviour of HVDC systems based on both conventional two-level converter and multilevel modular converter technology, experiencing a permanent line-to-earth fault. Operation of the proposed system under two different earthing configurations of converter side AC transformer earthed with converter unearthed, and both converter and AC transformer unearthed, was analysed and simulated, with particular attention paid to the converter operation. It was observed that the development of potential earth loops within the system as a result of DC line-to-earth faults leads to substantial overcurrent and results in oscillations depending on the earthing configuration.
ORCID iDs
Rafferty, John, Xu, Lie ORCID: https://orcid.org/0000-0001-5633-7866 and Morrow, John;-
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Item type: Article ID code: 51158 Dates: DateEventMarch 2015Published22 December 2014Published OnlineNotes: Date of Acceptance:25/08/2014 This paper is a postprint of a paper submitted to and accepted for publication in IET Power Electronics and is subject to Institution of Engineering and Technology Copyright. The copy of record is available at IET Digital Library Subjects: Technology > Electrical engineering. Electronics Nuclear engineering Department: Faculty of Engineering > Electronic and Electrical Engineering Depositing user: Pure Administrator Date deposited: 19 Jan 2015 15:10 Last modified: 25 Nov 2024 01:09 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/51158