Abstract: The open communication environment inevitably leads to the generation of communication delay in load frequency control. This paper offers an event-triggered model predictive output feedback control scheme for multi-region load frequency control systems. Model predictive controller exchanges predictive input sequences through a delayed communication network to construct a Luenberger-type observer to provide state estimates for transmission to the local controller. In addition， event trigger conditions are developed by comparing the deviation between the actual state observations and the estimated values used in the model output feedback controller， extending the maximum allowable time interval， thereby reducing the utilization of communication resources. Finally， the simulation study of the four-area load frequency control system shows that the proposed method can improve the control performance of the system and reduce the number of network information transmission in non-ideal communication networks with time-varying delay.

Key words:  load frequency control, model predictive output feedback, communication delay, event trigger