Fault-Tolerant Event-Triggered $\mathcal {H}_{\infty }$ Load Frequency Control for Multiarea Power Systems With Communication Delay

This article addresses the <inline-formula><tex-math notation="LaTeX">$\mathcal {H}_{\infty }$</tex-math></inline-formula> load frequency control problem for multiarea power systems. In order to reduce the heavy burden of the communication channel and relieve the impact caused by the actuator failures, an event-triggered mechanism and a fault-tolerant strategy are adopted, simultaneously. The main purpose is to design a controller so that the multiarea power systems are asymptotically stable in the case of actuator failures and communication delays. On the basis of the Lyapunov stability theory, some sufficient criteria for ensuring the stability of the synthesized system with an expected <inline-formula><tex-math notation="LaTeX">$\mathcal {H}_{\infty }$</tex-math></inline-formula> performance are obtained. Finally, the effectiveness and feasibility of the proposed method are demonstrated via an illustrative example.