基于电力信息网络的连通性,提出了电力信息网络绝对生存等级、相对生存等级以及关键服务失效率等概念及指标,分别从系统整体性、系统关键服务以及系统服务对系统整体性的依赖程度3个方面确定了电力系统信息网络的可生存性评定方法.针对一个具体的实例,通过Dijkstra算法计算链路权值,得到电力信息网络的可生存性指标,说明该方法的可行性,并提出提高现有信息网络可生存性的方法. Based on the connectivity of power information network, concepts and indicators such as absolute survival level, relative survival level, and critical service failure rate of power information network are put forward. From the perspectives of system integrity, system critical services and system services to system integrity, respectively On the one hand, we determine the survivability of power system information network.According to a concrete example, we calculate the link weights by Dijkstra’s algorithm to get the survivability index of power information network, and show the feasibility of this method and propose the improvement Existing information network survivability method.