Encrypted MPC Design for Load Frequency Control of Smart Grids Under Cyber-Attacks

We present an encrypted resilient model predictive control (MPC) strategy for load frequency control (LFC) of smart grid (SG) considering cyber-attacks. Specifically, explicit model predictive control (EMPC) is employed to achieve feedback stabilization of the frequency response. A resilient control scheme using dual controllers is designed to ensure the availability of control signals in the presence of cyber-attacks, and a homomorphic encryption (HE) scheme is used to guarantee the confidentiality and privacy protection of data transmitted between sensors, controllers, and actuators. The proposed approach is implemented and simulated using MATLAB/Simulink. A performance evaluation is conducted, comparing the proposed strategy with traditional PID controller. The simulation results show the security and robustness of the proposed strategy in stabilizing system frequency under cyber-attacks.