Distributed generators and their effects on distribution system protection performance

Hadi Zayandehroodi, Azah Mohamed, Hussain Shareef, Marjan Mohammadjafari

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The connection of distributed generators (DGs) to distribution networks greatly influences the performance and stability of such networks. Though 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 distributed generators and an overview of the effects of DGs on system protection relay coordination, particularly in cases where DGs are added to a distribution feeder.

Original languageEnglish
Pages (from-to)398-405
Number of pages8
JournalAustralian Journal of Basic and Applied Sciences
Issue number10
Publication statusPublished - Oct 2011
Externally publishedYes


  • Distributed Generator (DG)
  • Distribution Network
  • Overcurrent Relay
  • Protection Coordination

ASJC Scopus subject areas

  • General


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