Simulation and Experimental Study of the Impedance Detection Anti-Islanding Method in the Single-Inverter Case

The impedance detection method of islanding prevention is often touted as one that possesses no nondetection zone in the single-inverter case. However, simulation results and experiments indicate that this is not necessarily true; the effectiveness of impedance detection is highly dependent on the specific implementation of the method. This paper discusses a simulation and experimental study to examine the origins of this nondetection zone, and a simple modification that appears to significantly reduce the size of the nondetection zone