考虑路由策略的电力CPS连锁故障建模及分析

Modeling and Analysis of Cascade Failure of Power Grid Cyber-Physical Systems Considering Routing Strategy

电力CPS的快速发展,对信息网提出了更高的要求,传统电力系统分析方法更多关注孤立的电力网或信息网,缺乏对电力CPS耦合特性的完整认识。为研究信息网对电力CPS连锁故障的影响,首先提出了一种改进的拥塞感知路由算法,以研究不同路由策略对信息网传输效率的影响;然后提出了考虑信息网路由策略的电力CPS连锁故障模型;最后基于所提模型研究了路由策略及路由策略相关参数对电力CPS连锁故障的影响。仿真结果发现,所提改进路由策略可有效减小电力CPS连锁故障发生概率,提高电力系统鲁棒性。

Rapid development of cyber-physical power system（CPS） in power system puts forward higher requirements to information network. However, much attention is paid to isolated power grid or information network in recent years, and the studies ignore coupling characteristics of CPS. In order to study influence of information network on cascade failures of CPS, firstly, an improved congestion aware routing algorithm was proposed to study the effect of different routing strategies on transmission efficiency of information network. Secondly, CPS cascade failure model considering information network routing strategy was established correspondingly. Finally, influence of routing strategy and its parameters on CPS cascade failures was investigated. Simulation results showed that the optimal routing strategy and its parameters can effectively reduce occurrence probability of cascade CPS failures and improve robustness of the power system.