A Sensitivity Analysis of Different Power System Parameters on Islanding Detection

This work analyzes the sensitivity of 16 power system parameters that can be used in passive techniques to detect islanding and nonislanding events. It is observed that the rate of change of frequency over reactive power (df/dq) can effectively detect minute disturbances in power supply. It is also shown that active and reactive power mismatch has an opposing effect on the variation of frequency (df) in real time environment. As a result of this, a new passive technique based on df/dq is proposed. The simulation results indicate that the proposed technique is able to distinguish islanding from other events of similar signatures, such as load variation, capacitor switching, faults, and induction motor starting.