Development of dynamic estimators for islanding detection of inverter-based DG

Mohamed Al Hosani, Zhihua Qu, H. H. Zeineldin

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


In this paper, a new islanding detection method (IDM) is proposed to dynamically estimate islanding occurrence. The proposed dynamic estimators estimate amplitudes and phase angles of the current injected by the grid at the point of common coupling with the distributed generation (DG) in addition to the DG's bus voltage. A distributed two-level algorithm is proposed to detect an islanding condition for single and multi-DG configurations. Analytical design and transient analysis are carried out for the islanding detection problem to determine the nondetection zone (NDZ) of the proposed islanding detection algorithm. A local low-frequency meshed communication network is sufficient to achieve distributed islanding detection capability for a general multi-DG network with negligible NDZ. It is shown through simulations that the proposed IDM can successfully distinguish an islanding condition from other disturbances that may occur in power system networks.

Original languageBritish English
Article number6922159
Pages (from-to)428-436
Number of pages9
JournalIEEE Transactions on Power Delivery
Issue number1
StatePublished - 1 Feb 2015


  • Distributed generation (DG)
  • dynamic estimator
  • islanding detection methods (IDMs)
  • nondetection zone (NDZ)
  • quality factor and transient response


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