Title: Emerging techniques in islanding detection for microgrids: an extensive review

Authors: Nirali Upadhyay; Sweta Shah; Vipul Upadhyay

Addresses: Electrical Engineering Department, Government Engineering College, Modasa, Gujarat, India ' Electrical Engineering Department, Indus University, Ahmedabad, Gujarat, India ' Electrical Engineering Department, Government Engineering College, Modasa, Gujarat, India

Abstract: Use of distributed generation (DG) as renewable energy at distribution level is substantially increased to fulfil increasing demand. However, the penetration of different renewable energy sources as DG increases new challenges and concerns like working of micro grid under islanded and grid connected mode. Also detecting intentional and unintentional islanding as per IEEE standards is a major challenge. Unintentional islanding give rise to several grid protection issues like stability of grid and safety of worker. To overcome these issues and for satisfactory operation of micro grid many islanding detection techniques have been developed by researchers. This paper presents a comparative review of several islanding detection schemes with basic focus on its working algorithm, merits and demerits, on detection zone and speed. The outcome is, there is no perfect detection technique developed yet. Some of these techniques or integration of them are to be applied practically to specific distributed source and grid structure.

Keywords: micro grid; islanding detection methods; distributed generation; non-detection zone; NDZ; intentional islanding; unintentional islanding.

DOI: 10.1504/IJRET.2024.148783

International Journal of Renewable Energy Technology, 2024 Vol.14 No.4, pp.337 - 353

Received: 05 Jul 2023
Accepted: 06 Apr 2024
Published online: 24 Sep 2025 *

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