混合攻击下基于带宽感知型事件触发机制的负荷频率控制

This paper presents a load frequency security control scheme for new power systems under hybrid attacks, which achieves closed-loop stability and secure operation under deception attacks and denial of service (DoS) attacks. Firstly, a detection mechanism against intermittent DoS attacks is introduced based on the acknowledgment character (ACK) technique. Secondly, to ensure system control performance and conserve network communication resources, a novel bandwidth-aware event-triggering mechanism is designed. Thirdly, a switching model is established for the multi-area power system under hybrid attacks, consisting of wind turbine generators and battery energy storage systems. Utilizing Lyapunov-Krasovskii functional theory and linear matrix inequality techniques, a sufficient condition for exponential mean-square stability satisfying H∞ performance is demonstrated and an event-triggered security controller is derived. Finally, a simulation experiment is conducted to validate the effectiveness and superiority of the proposed DoS attack detection mechanism and the event-triggered security controller.