Wide-Area Robust Sliding Mode Controller for Power Systems With False Data Injection Attacks

In this paper, the issue of interarea oscillations in wide-area power systems with false data injection (FDI) attacks is studied. A wide-area robust sliding mode controller (WARSMC) is proposed to defense the hacker attacks and damp out the interarea oscillations. First, an extended observer is designed to estimate the states and defense actuator attacks simultaneously. Then, a WARSMC based on the estimated states is presented. In which a new sliding function is constructed, meanwhile, the new reaching law is designed. Furthermore, the system dynamics under designed control law is analyzed and the convergence of the proposed algorithm is proved. Finally, the case studies are based on the two-area four-machine and the 16-machine 68-bus power system. Simulation results verify the effectiveness of the designed method for defensing the FDI attacks and damping out the interarea oscillations.