Passive Islanding Detection Method based on Resultant Sequence Impedance Component and Load Shedding in Islanded Area

The active island detection method aims to reduce the blind area of passive island detection methods, thereby affecting power quality. The concept of integrated sequential impedance is offered as a new approach to island detection. This method replaces the conventional impedance approach's abrupt variable with the integrated impedance sequence component of the Inverter side union point. Islanding is detected when the value exceeds the threshold range by monitoring the PCC for a shift in the integrated impedance sequence component. The authors recommend implementing a priority -based load shedding strategy to address the power mismatch in the identified islands. To prevent accidental tripping, it offers superior stability in a variety of non-islanding scenarios. Other benefits of the proposed approach include its low cost and ease of implementation, independence from the number and type of DG connected to the utility grid, and the absence of any negative effects on output power quality. The efficacy of the proposed method has been confirmed through studies conducted in various real -world settings. Compared to other methods reported in the literature, the obtained detection times show that the proposed method is superior.