A robust islanding detection method with zero-non-detection zone for distribution systems with DG

This paper proposes a strategy for detecting unintentional islanding operations (IOs) in distribution networks (DNs) with distributed generation (DG), which eliminating the non-detection zone (NDZ). hybrid method achieves zero-NDZ by taking advantage of both passive and active methodologies an inverter-based DG scenario. The passive-based part proposed considers settings low thresholds is activated whenever they are surpassed. following step uses three-phase static RC load. load connected to intentionally force frequency its derivative exceed established thresholds. Thus, events zero power imbalance can be identified. Unlike other existing methods, this technique does not degrade quality (PQ) require output curtailment. evaluation has been carried out through extensive set scenarios considering non-islanding events. detection capabilities have explored custom-made DN test system recommended IEEE 929-2000 standard. simple implementation, requires level computational complexity, provides high degree reliability, assures fast detection.