Abstract
The paper deals with the design of an optimal decentralized load-frequency controller for interconnected energy systems. It is assumed that the entire system state vector is not measurable and a decentralized observer based on a reduced order Luenberger observer is synthesized to estimate the unmeasurable states. For the system augmented by the observer, a decentralized output feedback control is applied using an algorithm for parameter optimization with constrained controller structure. The results obtained from a digital simulation of a two-area electric energy system are presented and briefly discussed.
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