TCSC Output-Feedback Damping Controller Design to Damp Power Systems Oscillation with Considering Signal's Delay

This paper describes a new thyristor controlled series capacitor(TCSC) damping controller design for damping the power system oscillations. Since power systems interconnect more and more to exchange large amounts, wide-area measurement system (WMAS) is widely applied to monitor and control the interconnected power systems, which can enable the use of measured signals from remote locations for centralized control purpose. In this trend, the impact of time delays introduced by remote signal transmission and processing in WAMS has not been ignored. So this paper describes the wide-area TCSC damping controller design problem as time-delay output feedback control problem. Then based on free-weighting matrices method and robust controller theory, an output-feedback controller is designed by considering the signal's delay. Finally, the proposed LMI-based approach is proved to be applicable for the design of TCSC damping controllers to enhance robustness and response by simulations on a 2 areas 4 machines system.