Study and Development of Anti-Islanding Control for Grid-Connected Inverters

NREL, Ben Kroposki (NREL Technical Monitor)

Research output: NRELSubcontract Report


This is a report on the development of anti-islanding control for grid-connected inverters from distributed generation sources. Islanding occurs when a distributed generation source continues to provide electricity to a portion of the utility grid after the utility experiences a disruption in service. Since the utility no longer controls this part of the distribution system, islanding can poseproblems for utility personnel safety, power quality, equipment damage, and restoration of service. This report proposes a new family of anti-islanding schemes that meet IEEE 1547 interconnection standards, that can detect all disruptions in service, have minimum power-quality impact, require low-cost implementation, work for multiple distributed generators, and work for any multi-phaseinverters. It also provides design guidelines for the schemes, and evaluates and validates the proposed schemes for practical applications.
Original languageAmerican English
PublisherNational Renewable Energy Laboratory (NREL)
Number of pages82
StatePublished - 2004

Bibliographical note

Work performed by General Electric Global Research Center, Niskayuna, New York

NREL Publication Number

  • NREL/SR-560-36243


  • anti-islanding
  • anti-islanding frequency schemes
  • anti-islanding voltage schemes
  • design guidelines
  • distributed energy resources (DER)
  • distributed generation
  • frequency-domain analysis
  • General Electric (GE)
  • grid-connected inverters
  • IEEE 1547
  • interconnection standards
  • non-detection zone
  • time-domain simulation


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