Abstract
The design of decentralized robust load frequency control for interconnected power systems is studied in this paper. It is shown that, subject to a condition based on structured singular values (SSVs), each local area load-frequency controller can be designed independently. The robust stability condition for the overall system can be easily stated to achieve a sufficient interaction margin (introduced in this paper), and a sufficient gain and phase margin defined in classical feedback theory during each independent design. Within this general framework, each local area controller design is based on a new linear quadratic regulator design approach.
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