不断发展的自动化与信息技术的广泛应用明显提高了现代电力系统的运行水平,电力信息系统与电力物理系统的融合也逐步广泛和深入,从而进化为电力信息物理融合系统(CPPS).在CPPS中,信息设备的故障会影响物理系统的安全可靠运行,而外部对物理与信息元件的攻击则可能导致停电事故.在此背景下,为了分析物理元件与信息元件的交互影响,将CPPS抽象模拟为物理节点、物理-物理连接、信息节点、信息-信息连接与信息-物理连接5类元素,并在此基础上评估信息系统受损对物理系统运行的影响.在博弈论的框架下构建了双层数学规划模型分别对物理与信息环节进行了防御资源分配,用于量化存在假想攻击下系统中各环节的重要程度.以修改的IEEE 14节点系统为例进行了仿真计算,结果验证了所提方法的可行性与有效性.%The wide applications of the ever-developing automation and communication technologies have significantly enhanced the operation level of modem power system,while the interactions between the power information system and the power physical system are becoming more extensively and more in-depth,and hence the cyber-physical power system is formed.In the cyber-physical power system,the failure of information equipment has impacts on the security and reliability of power physical system,while attacks from outsiders against either physical or information equipment may result in power supply interruptions.On this background,the cyber-physical power system is simulated as five elements:physical node,physical-physical link,cyber-node,cyber-cyber link and cyber-physical link,to analyze the interactive influence between physical equipment and information equipment,based on which,the influence of information system failure on the operation of physical system is assessed.A bi-level mathematic programming model under the game theory framework is established for distributing defending resources on information and power modules,to quantify the importance degrees of modules under given attacks.The modified IEEE 14-bus power system is simulated and calculated,whose results verify the feasibility and effectiveness of the proposed method.
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