A new approach to the design of robust load-frequency controller for large scale power systems

A new method is presented for derivation of a robust controller for the load frequency controller of interconnected power systems with uncertain parameters. A combination of 'Matching conditions' and Lyapunov stability theory is adopted to implement a robust stabilizing controller. The stability analysis of the closed-loop interconnected systems for all admissible uncertainties is considered. The application of the proposed robust control scheme is considered through simulation studies of two-area power system model. Performance robustness of the proposed scheme is compared with the recent work of Wang et al. (1993, IEE Proc. C Vol. 140, pp. 11-16), and found to be very good. (C) 1999 Elsevier Science S.A. All rights reserved.