Utilisation of symmetrical components in a communication-based protection for loop MV feeders with variable short-circuit power

Research output: Research - peer-reviewArticle in proceeding

Abstract

Variability of the available short-circuit power also implies variation of the fault level, which can potentially cause several protection problems in the electric networks. In this paper, a novel protection method that is insensitive to the fault level changes caused by variable short-circuit power is presented. It relies on utilisation of symmetrical components of the short-circuit currents and on communication between the protection relays. The proposed method addresses the Single Phase to Ground (SPG) faults occurring in directly grounded distribution networks, with focus on closed-loop Medium Voltage (MV) feeders. Case studies are presented, which demonstrate that the proposed protection scheme is capable of effectively detecting the SPG faults in closed-loop feeders with variable short-circuit power.
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Details

Variability of the available short-circuit power also implies variation of the fault level, which can potentially cause several protection problems in the electric networks. In this paper, a novel protection method that is insensitive to the fault level changes caused by variable short-circuit power is presented. It relies on utilisation of symmetrical components of the short-circuit currents and on communication between the protection relays. The proposed method addresses the Single Phase to Ground (SPG) faults occurring in directly grounded distribution networks, with focus on closed-loop Medium Voltage (MV) feeders. Case studies are presented, which demonstrate that the proposed protection scheme is capable of effectively detecting the SPG faults in closed-loop feeders with variable short-circuit power.
Original languageEnglish
Title of host publicationProccedings of the 14th IET International Conference on Developments in Power System Protection (DPSP), 2018
Publication date2018
StateSubmitted - 2018
Publication categoryResearch
Peer-reviewedYes
EventThe 14th International Conference on Developments in Power System Protection - The Europa Hotel, Belfast, United Kingdom
Duration: 12 Mar 201815 Mar 2018
Conference number: 14

Conference

ConferenceThe 14th International Conference on Developments in Power System Protection
Nummer14
LocationThe Europa Hotel
LandUnited Kingdom
ByBelfast
Periode12/03/201815/03/2018

    Research areas

  • symmetrical components, communication-based protection, phase to ground fault, loop feeder, variable fault currents

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ID: 265089811