Isaac Scientific Publishing

International Journal of Power and Energy Research

Self-Adaptive Relaying Scheme of Reclosers for Fuse Saving in Distribution Networks with DG

Download PDF (1177.4 KB) PP. 8 - 19 Pub. Date: April 25, 2017

DOI: 10.22606/ijper.2017.11002

Author(s)

  • Sadegh Jamali*
    Centre of Excellence for Power System Automation and Operation, School of Electrical Engineering, Iran; University of Science and Technology, Tehran, Iran
  • Hossein Borhani-Bahabadi

    Centre of Excellence for Power System Automation and Operation, School of Electrical Engineering, Iran; University of Science and Technology, Tehran, Iran

Abstract

With growing penetration of distributed generation (DG) in electrical distribution networks (EDNs), miscoordination between fuse and recloser is more likely. This is the result of change of direction, as well as the magnitude of the fault current in the presence of DG where fuse saving cannot be achievd with standard recloser characteristics. This paper proposes a self-adaptive relaying scheme of reclosing operation for fuse saving in EDNs with DG. The recloser is programmed with a new non-standard characteristic using only the local voltage and current magnitude measurements. The proposed relaying scheme is tested for various fault conditions in a 20 kV Iranian radial EDN containing DG units at different locations. It is shown that the proposed scheme is not affected by the presence of DG units whereas the conventional relays fail the protection coordination. The proposed characteristic maintains proper recloser-fuse coordination for all fault types and different DG conditions.

Keywords

Fuse saving, distributed generation, electric distribution network, non-communication protection, self-adaptive relaying scheme

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