中文摘要：

为预防智能电网的连锁故障,改善电网运行安全性,从复杂系统视角建立连锁故障模型,以研究智能电网在其相互依存边受到目的攻击和防御时的鲁棒特性;并在此基础上运用生成函数理论和渗流理论研究了其连锁故障过程。仿真结果与理论分析相符。进一步的讨论指出,通过提高网络连接密度、减小幂律指数使其分布在2~3范围内、增大防御指数保护核心节点对之间的相互依存边等方法,可以有效增强智能电网的鲁棒性。

英文摘要：

In order to prevent cascading failures in smart grids and secure the operation of power grid, from the point of view of the complex network theory, we developed a cascading failures model for understanding the robustness of a smart grid under targeted attack and the defense of its interdependent links. Furthermore, we analyzed the process of cascading failures using the theories of generating functions and percolation. The simulation results agree with those by theory analysis. It is also found that a smart grid can be more robust by improving the network connectivity density, reducing the power-law exponents to the distribution range of 2～3, and increasing the defense index to protect the interdependent links among hub nodes.