A new decentralized robust controller design for multi‐area load–frequency control via incomplete state feedback

This paper deals with load-frequency control of multi-area power installation. The robust control theory is utilized to decouple the areas for a decentralized robust load-frequency controller. The proposed controller ensures that the overall multi-area power system is asymptotically stable. A new technique is included to exclude feedback from any immeasurable state. The product comprises a set of local load-frequency controllers, one for each area. The design and operation of each local controller requires solely the corresponding area's parameters and state measurements. Measurements of the immeasurable states are unnecessary. System parameter uncertainties and generation rate constraints are included in the simulation study of three-area power system. Good results are reported.