Print Email Facebook Twitter Two-Level Islanding Detection Method for Grid-Connected Photovoltaic System-Based Microgrid with Small Non-Detection Zone Title Two-Level Islanding Detection Method for Grid-Connected Photovoltaic System-Based Microgrid with Small Non-Detection Zone Author Bakhshi-Jafarabadi, Reza (Ferdowsi University of Mashhad) de Jesus Chavez, Jose (TU Delft Intelligent Electrical Power Grids) Sadeh, Javad (Ferdowsi University of Mashhad) Popov, M. (TU Delft Intelligent Electrical Power Grids) Date 2020 Abstract This article proposes a fast and reliable two-level islanding detection method (IDM) for grid-connected photovoltaic system (GCPVS)-based microgrid. In the first level of the proposed IDM, the magnitude of the rate of change of output voltage (ROCOV) is computed. If this variable exceeds a predefined threshold, a disturbance is injected into the duty cycle of DC/DC converter after a given time delay to deviate the system operating point away of its maximum power point (MPP) condition. This leads to a substantial active power output and voltage reduction in an islanded mode. Therefore, the ROCOV and the rate of change of active power output (ROCOP) indices, measured in the second stage, pose great negative sets at the same time in islanding states. However, the variation of at least one of these variables is near-zero in non-islanding switching events. The assessment of the presented algorithm has been conducted under extensive islanding and non-islanding scenarios for a case study system with two PV power plants using hardware-in-the-loop (HiL) simulation tests. The provided results remark precise islanding classification with an eminently small non-detection zone (NDZ) within 510 ms. The presented IDM has the advantages of self-standing thresholds determination, no improper effect on the output power quality, and simple and inexpensive structure. Moreover, the fast MPP restoration of the proposed scheme after islanding identification boosts the chance of seamless reconnection and DG autonomous operation in microgrid. Subject Photovoltaic systemIslanding detection method (IDM)Maximum power point tracking (MPPT)Microgridsnon-detection zone (NDZ)rate of change of active power output (ROCOP)rate of change of output voltage (ROCOV) To reference this document use: http://resolver.tudelft.nl/uuid:e5fe7206-0782-4627-b504-b4be105b69d5 DOI https://doi.org/10.1109/TSG.2020.3035126 Embargo date 2021-08-17 ISSN 1949-3053 Source IEEE Transactions on Smart Grid, 12 (2), 1063-1072 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2020 Reza Bakhshi-Jafarabadi, Jose de Jesus Chavez, Javad Sadeh, M. Popov Files PDF Two_Level_Islanding_Detec ... Zone_1.pdf 3.22 MB Close viewer /islandora/object/uuid:e5fe7206-0782-4627-b504-b4be105b69d5/datastream/OBJ/view