基于改进攻击图的电力信息物理系统跨空间连锁故障危害评估  

Assessing the Harmfulness of Cascading Failures Across Space in Electric Cyber-Physical System Based on Improved Attack Graph

作　　者：王宇飞 高昆仑 赵婷 邱健[2] 

机构地区：[1]全球能源互联网研究院,北京市昌平区102209 [2]中国电力科学研究院,北京市海淀区100192

出　　处：《中国电机工程学报》2016年第6期1490-1499,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(61471328);国家电网公司科技项目"电力信息物理系统安全策略及信息通信支撑关键技术研究"(XXB17201400056)~~

摘　　要：为了准确评估各类跨空间连锁故障对电力信息物理系统的危害性,提出一种基于改进攻击图的量化评估方法。首先,对攻击图算法进行改进,提出攻击图顶点的脆弱性因子概念并推导其计算公式,使其适用于量化评估;其次,将电力信息物理系统涵盖的网络攻击、电力二次设备故障和暂态稳定节点扰动等各类安全风险抽象成改进攻击图的顶点,建立各顶点之间的因果逻辑关系,以辨明跨空间连锁故障的所有类别,进而计算各顶点的脆弱性因子,实现对各类跨空间连锁故障危害的定量评估;最后基于110 k V智能变电站仿真环境搭建了局部电力信息物理系统模型,仿真了多种跨空间连锁故障并评估其危害,验证了该量化评估方法的有效性。In order to accurately assess the harmfulness of cascading failures across space in electric cyber-physical system（ECPS）, a quantitative assessment method based on improved attack graph was proposed. Firstly, for quantitative analysis, the attack graph algorithm was improved by the way that put forward the vulnerability factors of attack graph vertexes and deduced their calculation formulas. And then, to identify all kinds of cascading failures across space, all kinds of ECPS security risks, which include cyber attacks, power secondary equipments faults and power system disturbances, are abstracted into the improved attack graph vertexes to build the logical relationship between each step of cascading failures across space. After that, the vulnerability factor of each vertex was calculated to quantitative assess the harmfulness of cascading failures across space. Finally, to verify the validity of this quantitative assessment method, a local ECPS model has been built based on the 110 k V smart substation simulation, and a several cascading failures across space have been simulated and assessed those harmfulness.

关 键 词：电力信息物理系统 跨空间连锁故障 攻击图 脆弱性因子 网络攻击 电力二次设备故障 电力系统扰动 危害评估 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TM71[自动化与计算机技术—计算机科学与技术]