Wide-area damping controller design for power system via dynamic output feedback

Abstract

An approach for the wide-area damping controller (WADC) design via dynamic output feedback (DOF) to improving the performance of large-scale power systems is presented in this paper and network communication features of wide-area measurement system (WAMS) are taken into account. Firstly, a networked control system model for closed-loop power systems is established according to the linearized reduced-order state space description of the open-loop plant. This model captures signal transmission delay, data packet dropout, and packet disordering in constrained network communication of WAMS by time-varying delays. Then, based on Lyapunov theory and linear matrix inequality (LMI) technology, the design of the WADC via DOF is formulated as the delay-dependent control problem. Finally, nonlinear case studies are carried out to show the effectiveness and robustness of the proposed approach.