Protection coordination of directional overcurrent relays considering fault current direction

Hebatallah Mohamed Sharaf, H. H. Zeineldin, Doaa Khalil Ibrahim, Essam El Din Abo El Zahab

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

16 Scopus citations

Abstract

Directional inverse time overcurrent relays are used in protection systems of meshed networks to operate for fault currents in its forward zone of operation. They are used for primary and backup protection and their operation needs to be coordinated to assure selectivity. Different optimization techniques have been used to select their settings to achieve protection coordination, however the optimal protection coordination problem formulation doesn't consider the fault current direction to assure correct operation especially for backup relays. This paper proposes the addition of fault current direction constraint to the formulation of the optimal directional inverse overcurrent relays coordination. The proposed formulation is tested on the distribution portion of the IEEE 30 bus system considering the effect of distributed generation addition. Results show that the proposed formulation gives more accurate optimal relay settings and thus highlighting the importance of inclusion of the proposed direction constraint in the protection coordination problem.

Original languageBritish English
Title of host publication2014 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2014
PublisherIEEE Computer Society
EditionJanuary
ISBN (Electronic)9781479977208
DOIs
StatePublished - 30 Jan 2015
Event2014 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2014 - Istanbul, Turkey
Duration: 12 Oct 201415 Oct 2014

Publication series

NameIEEE PES Innovative Smart Grid Technologies Conference Europe
NumberJanuary
Volume2015-January

Conference

Conference2014 IEEE PES Innovative Smart Grid Technologies Conference Europe, ISGT-Europe 2014
Country/TerritoryTurkey
CityIstanbul
Period12/10/1415/10/14

Keywords

  • Directional Overcurrent Relay
  • Distributed Generation
  • Meshed Distribution Systems
  • Protection Coordination
  • Relay Settings

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