Control of the Static Voltage Stability Margin Using Optimal Power Flow

Abstract

This paper presents an optimal strategy for the control of the static voltage stability margin (SVSM) in stressed power systems. The optimal control strategy is determined by an Optimal Power Flow (OPF) using existing reactive power control devices. The objective of the OPF is the maximisation of a static voltage stability index (MVSI). A conceptual real-time implementation of the proposed optimal control strategy is outlined and the optimal control strategy is applied to a 16-bus network. It is demonstrated that the SVSM can be significantly enhanced by using a static voltage stability index instead of the reactive power losses as objective function of the OPF.