Maximum Power Point Tracking Injection Method for Islanding Detection of Grid-Connected Photovoltaic Systems in Microgrid

This paper proposes a novel islanding detection method (IDM) for grid-connected photovoltaic systems (GCPVSs) through disturbance injection in the maximum power point tracking (MPPT) algorithm. When an absolute deviation of output voltage exceeds threshold, applied shifts system operating from its (MPP) condition. leads to sharp active reduction and consequently, significant drop islanded mode beyond standard limit. The proposed algorithm is defined way that distributed generator (DG) can be restored MPP after classification. It thereby effective microgrid where at level cater critical loads maintain stability isolated area are pursued. An intentional time delay has also been considered avoid nuisance tripping short-circuit faults which do not require tripping. assessment technique conducted sample network containing two GCPVSs real-time platform including actual relays hardware-in-the-loop (HiL). provided results under extensive scenarios standards endorse timely accurately with negligible non-detection zone (NDZ) as well no false non-islanding disturbances. comparative analysis presented scheme few recent IDMs GCPVS highlights overall superiorities, very small NDZ, fast detection, thresholds self-standing determination, adverse effect on quality, simple inexpensive integration.