Coordinated Static and Dynamic Voltage Control in Large Power Systems

The problem of analytically coordinating dissimilar voltage control actions in security control of power systems is addressed. A framework for hybrid dynamical control based on coordination of controls with diierent response time and dynamic characteristics is presented. The proposed method accounts for both static and dynamic aspects of the voltage control problem. The beneets of coordination are illustrated through simple dynamic coordination of tap locking and capacitor switching. A security constrained steady-state approach is rst used to determine the structure of the optimal control sequence, in terms of the type and amount of control, needed to provide stability and desired security margin. Dynamic analysis based on the dynamic sensitivity method is then carried out to verify the statically obtained schedule and complement it with the optimal value of switching times.