Presenting a Game-based Model for Confronting Cyber-physical attacks to Power Grid

Power grid is one of the most important infrastructure of any society on which other infrastructures depend. Studies show that the false data injection cyberattack can cause transmission lines to overload. Usually, the power grid is capable of responding to the natural overloads of transmission lines, but if a cyberattack is accompanied by a targeted physical attack, the overload of transmission lines can become out of control, and consecutive outages can occur in the power grid’s transmission lines. This situation eventually leads to local or nationwide blackouts of the power grid. To confront the overload of transmission lines, the power grid’s operator removes the overloads by taking corrective measures such as using the upward and downward reserve power as well as load shedding. In this paper, we first show how a simultaneous cyber-physical attack can increase the amount of load shedding. Then a model based on game theory is presented to plan the load dispatch of the grid so that the operator can repel the cyber-physical attack with the lowest possible cost using corrective measures. The proposed model is simulated on a 5-bus test network and the results are analyzed.