FACTS devices employ high speed, and high power semi-conductor technologies to help better regulate the power systems. To improve the damping of oscillations in power systems, supplementary control laws can be applied to the existing FACTS devices. These supplementary actions are referred to as power oscillation damping (POD) control. In this paper, the POD controllers are designed using the frequency response and residue methods. The small signal stability of power systems as affected by TCSC devices and PODs are evaluated and compared with the base power system where no FACTS devices are included. Both modal analysis and time domain simulations are presented to show the impact of the designed PODs on damping the electromechanical oscillations in power systems. Several examples are given to show the impact of POD input signals on the design and system response. The results show the capability of well designed FACTS-POD in improving the stability of power systems. In addition, the design is successfully implemented using the considered methods.