Reactive power planning against power system steady state voltage instability

This paper tests a long term VAR planning algorithm, developed earlier to counter steady state voltage instability issues under severe contingencies, on a portion of a large scale system model consisting of 16173 buses representing Eastern interconnection. The planning method is a mixed integer programming (MIP) based optimization algorithm that uses sensitivity information of performance measures with respect to reactive devices to plan for multiple contingencies simultaneously, while satisfying post-contingency voltage stability margin performance criteria. The results of this study illustrate the effectiveness of the planning method when applied on a practical large scale system.