Impact of damping scheme on damping characteristics of Static Synchronous Series Compensator

This paper shows the impact of two damping controllers on the damping characteristics of the Static Synchronous Series Compensator with respect to their ability to improve small signal stability of single-machine infinite bus system. The first damping controller is introduced the through the magnitude control loop of the SSSC while the second is introduced through the angle control loop of the SSSC. Eigenvalue analysis and time domain simulations are performed to show that the first scheme provides higher damping than the second scheme.