An irregular current injection islanding detection method based on an improved impedance measurement scheme

Liu, M.H.; Zhao, W.; Wang, Q.; Huang, S.L.; Shi, K.P.

Abstract

One class of islanding detection methods, known as impedance measurement-based methods and voltage change monitoring-based methods, are implemented through injecting irregular currents into the network, for which reason they are defined in this paper as irregular current injection methods. This paper indicates that such methods may be affected by distributed generation (DG) unit cut-in events. Although the network impedance change can still be used as a judgment basis for islanding detection, the general impedance measurement scheme cannot separate island events from DG unit cut-in events in multi-DG operation. In view of this, this paper proposes a new islanding detection method based on an improved impedance measurement scheme, i.e., dynamic impedance measurement, which will not be affected by DG unit cut-in events and can further assist some other equipment in islanding detection. The simulations and experiments verify the stated advantages of the new islanding detection method.

Citation

Liu, M., Zhao, W., Wang, Q., Huang, S., & Shi, K. (2018). An irregular current injection islanding detection method based on an improved impedance measurement scheme. Energies, 11(2474), Article 2474. https://doi.org/10.3390/en11092474

• Journal Article Type: Article
• Acceptance Date: Sep 17, 2018
• Online Publication Date: Sep 17, 2018
• Publication Date: Sep 17, 2018
• Deposit Date: Sep 19, 2018
• Publicly Available Date: Sep 20, 2018
• Journal: Energies
• Electronic ISSN: 1996-1073
• Publisher: MDPI
• Peer Reviewed: Peer Reviewed
• Volume: 11
• Issue: 2474
• Article Number: 2474
• DOI: https://doi.org/10.3390/en11092474
• Public URL: https://durham-repository.worktribe.com/output/1319665