Robust Control of Inter-area Oscillations in a Multimachine Network Employing LMI Based Wide Area TCSC Controller
The problem of inter-area oscillations (0.2-1.0Hz) is a long-standing issue in electric power systems. These oscillations may sustain and grow up to cause severe system outage if adequate damping is not available. Traditionally, potential benefits of using Power System Stabilizer (PSS) and Flexible AC Transmission System (FACTS) devices to damp these oscillations for enhancing power system stability are well established. Thyristor Controlled Series Compensator (TCSC) has been proven to be very robust and effective means, among many FACTS devices for mitigating small signal oscillation problem in long transmission lines of modern power systems.