Passive Island Detection Method Based on Sequence Impedance Component and Load-Shedding Implementation

Sareddy Venkata Rami Reddy, T. R. Premila, Ch. Rami Reddy (), Mohammed A. Alharbi and Basem Alamri ()
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Sareddy Venkata Rami Reddy: Department of Electrical and Electronics Engineering, Vels Institute of Science, Technology & Advanced Studies, Pallavaram, Chennai 600117, India
T. R. Premila: Department of Electrical and Electronics Engineering, Vels Institute of Science, Technology & Advanced Studies, Pallavaram, Chennai 600117, India
Ch. Rami Reddy: Department of Electrical and Electronics Engineering, Joginpally B. R. Engineering College, Hyderabad 500075, India
Mohammed A. Alharbi: Electrical Engineering Department, Taibah University, Naif Bin Abdulaziz Road, P.O. Box 344, Al-Madinah Al-Munawarrah 41477, Saudi Arabia
Basem Alamri: Department of Electrical Engineering, College of Engineering, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia

Energies, 2023, vol. 16, issue 16, 1-14

Abstract: Active islanding detection techniques majorly affect power quality due to injected harmonic signals, whereas passive methods have a large non-detection zone (NDZ). This article presents a new method based on the resultant sequential impedance component (RSIC) as a new approach to island detection with zero NDZs. The abrupt variable in the conventional impedance approach was replaced by the RSIC of the inverter in this method. When the measured value exceeds the threshold range, islanding is detected by monitoring the variations in the RSIC at the point of common coupling (PCC). For proper power utilization in the identified islands, a priority-based load-shedding strategy is also recommended and implemented in this article. Its efficacy was verified in a wide range of real-world settings. It offers superior stability in various non-islanding (NIS) scenarios to prevent accidental tripping. The proposed method advantages include a cheap cost, the simplicity of implementation, independence from the number and type of distributed generation (DG) units connected, and no power quality effects. Compared to other methods reported in the literature, the obtained detection times illustrate that the proposed method is superior.

Keywords: islanding detection; distributed generation; non detection zone; load shedding (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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