A novel method for voltage instability protection

The growing concern about wide area power system disturbances and their impact on power systems have reinforced interest in the new generation of system protection tools. Their application depends on their reliability, which, in turn, depends on the reliability of the hardware infrastructure on which they rely. In this paper, we propose a modification of a Voltage Instability predictor, proposed some time ago. The modification provides a path for integration of a stand-alone, local protection devices with a potential system-wide action, and takes into account the voltage characteristics of the loads.