拒绝服务攻击下互联多区域电网系统的弹性负载频率控制  

Resilient Load Frequency Control for Multi-area Interconnected Power System under Denial-of-Service Attacks

作　　者：高强[1,2] 杜子钰 吉月辉 刘俊杰[1,2] GAO Qiang;DU Ziyu;JI Yuehui;LIU Junjie(School of Electrical Engineering and Automation,Tianjin University of Technology,Tianjin 300384,China;Tianjin Key Laboratory of Control Theory and Application for Complex Systems,Tianjin 300384,China)

机构地区：[1]天津理工大学电气工程与自动化学院,天津市300384 [2]天津市复杂系统控制理论及应用重点实验室,天津市300384

出　　处：《电力建设》2023年第4期54-62,共9页Electric Power Construction

基　　金：国家自然科学基金资助项目(61975151,61308120)。

摘　　要：为实现互联多区域电网系统的频率稳定,负荷频率控制需要通过开放通信网络获取信号和发送命令。在开放的通信网络环境下,系统不免会受到天气、网络攻击等外界环境的干扰,引起电网频率波动。例如拒绝服务(denial-of-service, DoS)攻击,这些因素会阻止一定数量的信号传输,从而降低负载频率控制方案的性能,甚至导致电网系统不稳定。针对测量通道和控制通道拒绝服务攻击下互联多区域电网系统,完成弹性负载频率控制。首先给出DoS攻击频率和持续时间满足的假设条件,然后设计灵活的弹性控制器,保证闭环系统的输入状态稳定性,并确定合适的采样机制,实现系统性能和通信资源的有效折衷平衡。最后,以两区域互联电网系统为对象进行仿真,得到所提方法能够有效地克服DoS攻击和扰动带来的影响,保证了闭环系统的输入状态稳定性,验证了此方法的有效性。In order to achieve frequency stability of interconnected multi-area power system,load frequency control needs to obtain signals and send commands through open communication network.In the open communication network,the system will inevitably be affected by the interference of external environment such as weather and network attacks,which will cause the frequency fluctuation of power grid.These network attacks such as Denial-of-Service(DoS)attacks will block a certain amount of signal transmission,thus reduce the performance of the load frequency control scheme,and even lead to the instability of the power system.This paper investigates a resilient load frequency control(LFC)for multi-area interconnected power system with measurement channel and control channel under DoS attacks.Firstly,the hypothesis of DoS attack frequency and duration is given,then a flexible elastic controller is designed to ensure the stability of the input state of the closed-loop system,and an appropriate sampling mechanism is determined to achieve an effective compromise balance between system performance and communication resources.Finally,the effectiveness of the proposed method is verified by the simulation of a two-area interconnection power system.

关 键 词：互联多区域电网系统 负载频率控制 拒绝服务攻击 弹性负载频率控制 

分 类 号：TM732[电气工程—电力系统及自动化]