Discussion of the behavior of the classical linear instability method of islanding prevention as a function of load quality factor

The classical linear instability method (CLIM) of islanding prevention works by manipulating the control loop of a photovoltaic inverter such that when the utility disappears, right-half-plane poles appear, and the inverter becomes unstable, eventually leading to a shutdown due to abnormal voltage or frequency. The CLIM has been less well-studied than other methods, so in this work, a MATLAB/Simulink model of a CLIM-equipped inverter was developed and tested. In this work, the version of CLIM tested was the one implemented in the Teslaco inverter of the early 1980s. In this paper, the simulation results are presented and discussed.