基于攻击者视角的电力信息物理融合系统脆弱性分析  

Vulnerability analysis of cyber physical power system from attacker's perspective

作　　者：张殷[1] 肖先勇[1] 李长松[1] ZHANG Yin;XIAO Xianyong;LI Changsong(College of Electrical Engineering and Information Teehnology,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《电力自动化设备》2018年第10期81-88,共8页Electric Power Automation Equipment

摘　　要：基于攻击者视角分析电力信息物理融合系统的脆弱性有助于决策者辨识系统脆弱环节和潜在威胁,为开展针对性防御奠定基础。结合复杂网络理论,建立了考虑信息物理交互的电力信息物理融合系统一体化模型;在直流潮流模型下,研究了信息层元件失效对物理层故障传播的影响;从攻击者角度,建立了4种攻击模式,从物理层和信息层结构与功能属性出发,建立了更为全面的融合系统脆弱性指标,并对2种信息网拓扑结构下融合系统的脆弱性进行了分析。仿真结果表明,物理层负载水平和信息层拓扑结构是影响融合系统脆弱性的重要因素;相比随机攻击,蓄意攻击下融合系统更脆弱,协同攻击下尤为脆弱;高加权介数和高加权度数信息节点对维持信息层功能起关键作用;信息物理协同破坏效应严重恶化了系统的性能。Analyzing the vulnerabilily of eyber physical power system from attacker＇s perspective is beneficial for decision makers to identify the vulnerable components and potential threats, which lays the foundation for the formulation of targeted defense. An integrated model of cyber physical power system considering the cyber physical interaction is built based on the complex network theory, and the impact of cyber component failures on the fault propagation of physical layer is studied under the DC power flow model. Four kinds of attack modes are proposed from the attacker＇s point of view, and the more comprehensive vulnerability indices of cyber physical power system are built from the perspectives of the structural and functional properties of physical and cyber layers to analyze the vulnerability of the system under two topologies of cyber network. Simulative results show that,the load level of physical layer and the topology of cyber layer are the important factors that affect the vulnerability of the system, compared with random attack modes, the system is more vulnerable under the malicious attack mode and especially vulnerable under the coordinated attack mode,the cyber nodes with high weighted betweenness and high weighted degree play a crucial role in maintaining the function of cyber layer, and the synergistic damage effect of cyber and physical component failures seriously deteriorates the system performance.

关 键 词：电力信息物理融合系统 信息物理交互 复杂网络理论 脆弱性 攻击者视角 

分 类 号：TM711[电气工程—电力系统及自动化]