Abstract：New energy power generation has strong volatility and randomness，and its large-scale grid

connection seriously affects the stable operation of power grid frequency. The new generation of power system also

relies on communication network for data transmission，which will consume a lot of network resources and increase

the communication burden. In order to solve the above problems，the frequency control was studied which is in the

event-triggered model of electrolytic aluminum load participating in the secondary frequency control of the power

grid. Firstly，a load frequency control model was designed，considering the participation of electrolytic aluminum

load in the secondary frequency control of the power grid. Secondly，a load frequency control strategy based on a

dynamic event-triggered model predictive control was proposed to mitigate wind power or load fluctuations and

conserve communication network resources. Furthermore，an auxiliary optimization-based load frequency control

design scheme was developed by considering the limits of thermal power unit and electrolytic aluminum load，so as

to solve feedback gain matrix and weighting matrix parameters to ensure asymptotic stability of the closed-loop

system. Finally，simulation tests conducted on a three-area power system demonstrate that the proposed control

scheme significantly enhances the frequency regulation capability while saving communication network resource.

      Key words：electrolytic aluminum load；dynamic event-triggered mechanism（DETM）；load frequency control

（LFC）；model predictive contro（l MPC）