Voltage stability assessment of an island power system as a function of load model

In this work we present voltage stability assessment of an island's electric power system as a function of load models. The island power system is isolated from any other power system. This voltage stability assessment includes modal analysis, sensitivity analysis (V-Q curves analysis) and loadability analysis (P-V curves analysis). Modal analysis was used to identify the weakest buses in the system. The sensitivity analysis was used to identify the reactive power margins for each of the weakest buses identified by the modal analysis. The loadability analysis was used to identify how close is a bus to exceed its loading limits and whether the bus voltage value is within the acceptable range. These three (3) analyses are performed using five (5) different load models.; The major contribution of this work is the use and comparison of modal, P-V and V-Q curves methods of voltage stability assessment as a function of different load models.