针对混合攻击下的一类新型电力系统，本文提出了一种负荷频率安全控制方案，实现在欺骗与拒绝服务(denial of service，DoS)攻击下的闭环稳定与安全运行。首先，基于确认字符(acknowledgement character，ACK)技术提出了一种针对非周期性DoS攻击的"阴阳"检测机制。其次，为保持系统控制性能并节约网络通信资源，提出了一种新颖的带宽感知事件触发机制。再次，建立了一个混合攻击下包含风力发电机组与电池储能系统的多区域电力系统切换模型。利用Lyapunov-Krasovskii泛函(Lyapunov-Krasovskii functional，LKF)理论与线性矩阵不等式(linear matrix inequality，LMI)技术，给出满足H∞性能的系统指数均方稳定充分条件，并导出了事件触发负荷频率安全控制器的设计准则。最后，通过仿真实验验证了所提DoS攻击检测机制和事件触发安全控制器的有效性与优越性。
Load frequency control based on bandwidth-aware event-triggering mechanism under hybrid attacks
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.
deception attackintermittent DoS attackbandwidth-aware event-triggering mechanismattack detectionload frequency control
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