Design of decentralized robust load-frequency controller based on SVD method

A decentralized robust control scheme is presented for the load-frequency c ontrol of interconnected power systems with uncertain parameters. A singula r value decomposition (SVD) technique and Lyapunov stability theory are ado pted to implement a decentralized robust controller. The stability analysis of the closed-loop interconnected systems for all admissible uncertainties is discussed. The performance robustness of the proposed decentralized rob ust control scheme has been verified through simulation studies on a two-ar ea power system model. The effectiveness of the decentralized control algor ithm is compared to that of a centralized robust one. It has been found tha t both control schemes have almost the same performance with integral contr ol action in the presence of parametric uncertainty in the plant. (C) 1999 Elsevier Science Ltd. All rights reserved.