A comparison of voltage stability assessment techniques in a power system

Abstract: Voltage stability analysis has of recent been a growing concern to power system utilities due to several incidence of blackouts that occurred lately in some part of the globe. This paper discusses some existing voltage stability techniques such as L-Index, Voltage Collapse Proximity Index (VCPI) and modal analysis of the reduced Jacobian. A comparative analysis of these techniques is also presented. The total computational time taken by each approach to attain a solution is also estimated in this work. The effectiveness of all the approaches is tested on the IEEE 14-bus power system. Simulation results obtained show that the use of modal analysis in the study of voltage stability in a power system will be of advantage compared with other techniques as it saves time and require less computational efforts