Power System Damping Enhancement Using Combined Operation of Robust Energy Capacitor System and Power System Stabilizer

Abstract

High damping ratio and fast settling time are very challenges for improving the stability performance in power system. In this paper, an energy capacitor system (ECS) is applied in a two-area multi-machine power system to provide the transient stability enhancement. The algorithm for designing the robust damping controller of the ECS is based on the loop shaping control. The results from the design are the control parameters of the ECS damping controller with the constraint that the size of the ECS must satisfy the criteria of damping consideration. From the simulation results, it can be found that the ECS can effectively enhance the damping of power system oscillations. Moreover, the combination of ECS and the existing power system stabilizers (PSSs) allows exceptional performance and more desirable size of ECS.