Utilizing Distributed Power Flow Controller (DPFC) for power oscillation damping

Because of the power industry moving toward marketoriented, the power tends to be transmitted over longer distances. However, the capability of long, inter-regional power transmission is usually limited, and one of the limitations is caused by low-frequency power oscillations. One of the critical oscillation, known as Inter-area oscillation, is observed when a group of generates in one region swings against group in another region [1]. The traditional solution is to use power system stabilizers (PSSs) on generator excitation control systems [2]. However, PSSs are usually designed for local oscillation damping, and in large multi-area power systems it might be difficult to tune all the PSSs parameters. FACTS devices can be employed for inter-area power oscillation damping (POD), and they are proved to be effective [3], [4], [5].