Optimal Strategy of Attack-Defense Interaction Over Load Frequency Control Considering Incomplete Information

Studying cyber attack-defense interaction over load frequency control (LFC) had become critical for guaranteeing the frequency quality and safety operation of power systems. It was revealed that both the attacker and the defender have multiple alternatives from strategy pools, which results in optimal strategy selection in pursuit of optimal payoff. In this paper, game theory model is introduced to analyze optimal strategy of attack-defense interaction over LFC. As to payoff calculation, we consider the comprehensive evaluating metric containing both the application effect and implementation cost of specific strategies, and propose a fuzzy logic-based calculation method. Considering the incomplete information in the attack-defense interaction game, we propose a mixed strategy method to obtain the optimal strategy. The simulation results show the effectiveness of the proposed optimal strategies.