The paper presents a novel methodology for feasibility analysis and design of optimal
decentralized load frequency control for multi-area interconnected electric power systems.
Feasibility of the proposed decentralized control scheme is determined with a fixed mode
evaluation algorithm based on eigenvalue dynamics. The eigenvalue sensitivity expressions
are also used to determine decentralized feedback gains that will result in system transient
performance similar to the one obtained with a centralized optimal control law. The …

A new approach for optimal decentralized load frequency control of a multi-area
interconnected power system is presented, which includes the optimal design of a
decentralized load frequency controller, an observer for unmeasurable local states and load
disturbances, and a quadratic estimator for tie-line power flow information transmitted at
intervals. The optimal design of the decentralized controller is based on a modified
application of the singular perturbation theory, and the decentralized Luenberger observer …