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

Catalin Iosif Ciontea, Claus Leth Bak, Frede Blaabjerg, Qiteng Hong, Campbell Booth, Kjeld Kilsgaard Madsen

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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
Original languageEnglish
Pages (from-to)1245-1251
Number of pages7
JournalThe Journal of Engineering
Volume2018
Issue number15
Early online date18 Jul 2018
DOIs
Publication statusPublished - 31 Oct 2018
Event14th International Conference on Developments in Power System Protection: The 14th International Conference on Developments in Power System Protection (DPSP), Belfast, UK - Europa Hotel, Belfast, United Kingdom
Duration: 12 Mar 201815 Mar 2018
https://events.theiet.org/dpsp/index.cfm?utm_source=redirect&utm_medium=any&utm_campaign=dpsp

Keywords

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

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