拒绝服务攻击下的分布式弹性负荷频率控制

开放通信网络的大量应用,给电网带来了潜在安全隐患.文章研究了周期性拒绝服务攻击下的弹性负荷频率控制器的设计问题.给出了一种可检测的拒绝服务攻击模型,推导了网络攻击下的分布式负荷频率控制时滞切换系统模型.基于李亚普洛夫理论,分析了切换系统的稳定性,并进行了弹性控制器设计,所设计控制器对负荷扰动和网络攻击具备一定的鲁棒性.最后,在Matlab/Simulink平台搭建了两区域电力系统模型,验证了所提方法的有效性.

Resilient control of distributed load frequency control for multi-area power systems under denial-of-service attacks

The open communication network has been widely used in modern load frequency control (LFC) for multi-area power systems, which poses a safety hazard to power systems. This paper investigates the problem of the design of resilient controller for load frequency control against periodic Denial-of-Service (DoS) attacks. Firstly, a detectable DoS attack modle is given. Then, a time delay switched distributed LFC system model is formulated under DoS attacks . Furthermore, the system stability of switched system is analyzed by using the Lyapunov theory, and a design method for resilient controller is proposed, which is robust to the load disturbance and cyber attack. Finally, the effectiveness of the proposed method is validated by a two-area power system in MATLAB/SIMULINK.