Impact of distributed generations on power system protection performance

Hadi Zayandehroodi, Azah Mohamed, Hussain Shareef, Marjan Mohammadjafari

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


Though distributed generators (DGs) have significant economic and environmental benefits, increased penetration of DGs will impose significant technical barriers for the efficient and effective operation of bulk power systems. Increased fault current contribution and load flow changes are the major two impacts on utility systems, and these will affect existing protective relaying, especially overcurrent relays. To ensure safe and selective protection relay coordination, the impact of DGs should be taken into account when planning DG interconnection. This paper presents an introduction of DGs and an overview of the impacts of DGs on system protection relay coordination. Several protection issues are identified to study the requirements for protection in the presence of DGs are also discussed.

Original languageEnglish
Pages (from-to)3873-3881
Number of pages9
JournalInternational Journal of Physical Sciences
Issue number16
Publication statusPublished - Aug 18 2011
Externally publishedYes


  • Distributed generator (DG)
  • Distribution network
  • Overcurrent relay
  • Protection coordination

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Physics and Astronomy


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