New islanding detection method with voltage amplitude variation for inverter-based distributed generator

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In this paper, a new islanding detection method for inverter-based distributed generator (DG) is proposed, which is based on voltage amplitude variation. The proposed method can detect islanding with zero non-detection zone (NDZ), negligible consequence on power quality and simple performance. A new formula is embedded in the active power reference equation to deviate and accelerate the point of common coupling (PCC) voltage when islanding occurs. Therefore, a passive under/over voltage relay will be sufficient to detect islanding within the voltage permissible limit. The main benefit of the presented method is its independency from the load parameters such as loading quality factor. The proposed method is modelled with computer-aided SIMULINK/MATLAB software. The presentation of the proposed method is considered for a DG system with both unity and non-unity power factors. The performance is confirmed for different loading quality factors. Furthermore, it is also validated the proposed islanding detection method under imbalance loading.
Original languageEnglish
Title of host publication2021 9th International Conference on Smart Grid (icSmartGrid)
Place of PublicationNew York, N.Y.
Number of pages6
ISBN (Print)9781665445320
Publication statusPublished - 5 Oct 2021
Event2021 9th International Conference on Smart Grid (icSmartGrid) - Setubal, Portugal
Duration: 29 Jun 20211 Jul 2021


Conference2021 9th International Conference on Smart Grid (icSmartGrid)


  • distributed generator (DG)
  • over/under voltage (OUV)
  • over/under frequency (OUF)
  • non-detection zone (NDZ)
  • point of common coupling (PCC)

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