当前智能电网已是信息网与电力网深度相依耦合的信息-物理系统CPS。在CPS相依耦合作用下，电网运行与控制效率得到很大的提升，但运行安全风险也显著增加。近年全球多起大面积停电事故的原因分析表明：CPS相依耦合作用是智能电网连锁故障的最大诱因之一，使智能电网脆弱性更加恶化。.为此本项目将以“如何有效控制或抑制相依耦合关系对智能电网脆弱性带来的不利影响”为核心科学问题，拟通过相依耦合关系实质和特点理解、跨空间连锁故障演化规律探索、大电网脆弱点辨识、连锁故障传播抑制机制设计等角度，寻找解决该科学问题的有效技术途径。形成以“相依耦合结构优化”到“连锁故障抑制能力增强”为主线的创新成果，其包括电力CPS相依耦合关系抽象建模、连锁故障演化传播模型、智能电网薄弱点辨识机制、连锁故障抑制机制，并开发电力CPS脆弱性分析系统等。其成果将致力于增强我国智能电网快速响应和安全自愈能力、提升电力供应的安全保障水平。

At present, smart grid has become a cyber physical system (i.e., CPS) which integrated electric-power networks with information and communication networks. In the electric-power CPS, there exists an interdependent relationship between electric-power network and information & communication network, which has greatly worsened the vulnerability of smart grid, and has become a major factor to lead to cascading failure. Currently, many power blackout events have been reported in the world, and their related postmortem analysis show that the interdependence existing in the electric-power CPS exactly worsens the vulnerability of smart grid..Therefore, all of us highly concern this key issue, i.e., how to control and mitigate the adverse effects of interdependence on the vulnerability of smart grid, and then will arrange our research activities around this key issue, and plan to solve the following important relevant problems, i.e., how to understand the essences and features of the interdependent relationship in the electric-power CPS, how to gain an insight into the spreading rule of cascading failure, how to find out the critical nodes/links of smart grid, and how to mitigate the spreading of cascading failure. After that, we can obtain the following expecting contributions, i.e., the abstract modelling of the interdependent relationship in the electric-power CPS, the spreading model of cascading failure, the identification mechanisms of the critical nodes/links of smart grid, and the mitigation mechanisms of cascading failure. Meanwhile, we plan to develop a simulation platform for evaluating the vulnerability of smart grid, and emulating the spreading of cascading failure. Thoroughly, our significant research targets are to optimize the interdependent structure of the electric-power CPS, and to enhance the mitigation capability for cascading failure. Based on the above expecting exciting deliverable, we can give some useful suggestions and guidelines to the development of smart grid.