Discusses the feasibility of a decentralized load frequency control (LFC) system for a multi-area power system based on the state regulator theory. In particular, if the magnitudes of disturbances can be estimated with reasonable accuracy, the state regulator technique will yield no offset errors in the frequencies and tie-line power deviations even for unknown load disturbances. This implies that the state regulator with an estimation algorithm for load disturbances can be an ideal LFC method having a minimum settling time. The feasibility of the proposed approach is shown through numerical simulations on a multi-area power system having different types of LFC generators.
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