Design and Implementation of Islanding Detection and Protection Method of Integrated IEDs in AC Microgrid
DOI:
https://doi.org/10.15662/IJEETR.2026.0802148Keywords:
AC Microgrid, Islanding Detection, Intelligent Electronic Devices (IEDs), IEC 61850, GOOSE Messaging, Protection Coordination, Transient Stability, ETAPAbstract
In AC microgrids, unintentional islanding poses serious risks to equipment, personnel, and system stability. This paper presents the design and implementation of an integrated Intelligent Electronic Device (IED)-based islanding detection and protection scheme using IEC 61850 GOOSE communication. The proposed method combines passive, active, and communication-assisted techniques to achieve zero non-detection zone (NDZ), detection time under 5 ms, and high reliability across grid-connected and islanded modes. The system is modeled and simulated in ETAP, including load flow, short-circuit, transient stability, and relay coordination studies. Results demonstrate superior performance compared to conventional relays, with fast selective tripping, improved stability, and seamless transition during islanding events. The framework is suitable for modern renewable-rich microgrids and enhances overall protection coordination
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