Damping Controller Design for Power System Oscillations

Satisfactory damping of power oscillations is an important issue to be addressed when dealing with the angle stability of power systems. This phenomenon is well-known and observable especially when a fault occurs. To improve the damping of oscillations in power systems, supplementary control laws can be applied to existing devices. These supplementary actions are referred to as power oscillation damping (POD) control. In this work, POD control has been applied to two FACTS devices, TCSC and UPFC. The design method utilizes the residue approach, [1]. The presented approach solves the optimal siting of the FACTS as well as selection of the proper feedback signals and the controller design problem.