Adaptive overcurrent protection to mitigate high penetration of distributed generation in weak distribution systems

Naser El Naily, Saad M. Saad, Jamal Wafi, Abdelsalam Elhaffar, Nasser Husseinzadch

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)


The Growth in penetration Distributed Generation (DG) in the Distribution Network consequently rise and become widespread practise due to the increasing demand for electric supply. Integration of DG units in the Distribution Network lead into a significant change in the characteristic and configuration of the distribution network in many aspects, and could be characterized in terms of stability and reliability, which caused by the disturbance in the protection system configuration such as distance protection over and under-reach and over-current mis-coordination, especially in high penetration conditions. This paper presents a case study for integration a relatively large amount of distributed generation (DG) into a weak medium voltage distribution network (DN), addressing the problems resulted from integrating DG units into the distribution network, in particular, the planning and operation of distribution network protection with significant penetration of DG units. The adaptive method approach presented in this paper overcome the mis-coordination problems comes from connecting DG units to a typical distribution grid based on activating the directional functions and adding multiple group settings which a feature exist in all modern numerical protective relays. The theoretical analysis will be validated using simplified power system representing the Eastern Libyan Network simulated in NEPLAN package. Simulation and results indicate that the proposed adaptive protection scheme is a viable method to effectively mitigate the impact of DG penetration on protective devices, in addition enhancing the reliability and selectivity of the protection system.

Original languageEnglish
Title of host publication2017 9th IEEE-GCC Conference and Exhibition, GCCCE 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781538627563
Publication statusPublished - Aug 27 2018
Event9th IEEE-GCC Conference and Exhibition, GCCCE 2017 - Manama, Bahrain
Duration: May 8 2017May 11 2017

Publication series

Name2017 9th IEEE-GCC Conference and Exhibition, GCCCE 2017


Other9th IEEE-GCC Conference and Exhibition, GCCCE 2017


  • Distributed power generation
  • Fault protection
  • Power distribution

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Information Systems and Management
  • Media Technology
  • Instrumentation


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