考虑信息物理交互的电力–信息耦合网络脆弱性分析与改善策略研究  

Vulnerability Analysis and Improvement Strategy of Power-Information Coupled Networks Considering Cyber Physical Interaction

作　　者：张殷[1] 肖先勇[1] 李长松[1] ZHANG Yin;XIAO Xianyong;LI Changsong(School of Electrical Engineering and Information Technology,Sichuan University,Chengdu 610065,Sichuan Province,China)

机构地区：[1]四川大学电气信息学院

出　　处：《电网技术》2018年第10期3136-3144,共9页Power System Technology

摘　　要：考虑信息物理交互研究电力–信息耦合网络脆弱性及其改善策略具有重要意义。在直流潮流模型下,建立考虑信息物理交互的电力–信息耦合网络故障模型,研究信息网元件失效对电力网连锁故障的影响,分析由此引发的电力–信息耦合网络脆弱性;为深入揭示耦合网络脆弱性,在度数和介数指标基础上,采用映射加权方式计及监控功能属性和信息物理耦合的影响,提出了关键度指标辨识对耦合网络脆弱性具有重要影响的信息网关键环节;为改善耦合网络脆弱性,从强化关键环节防护和降低网络对关键环节依赖性角度,在元件和网络层面分别提出信息网关键环节保护和高权重电力节点网间加边策略。节点和边攻击的仿真结果表明,耦合网络面对随机攻击呈现较高鲁棒性,面对蓄意攻击呈现较高脆弱性。高关键度信息元件是影响耦合网络脆弱性的信息网关键环节,不同场景中耦合网络在针对这些元件的攻击下均呈现高脆弱性。保护高关键度信息元件以及对高权重电力节点增加耦合边可有效改善耦合网络脆弱性。Research on vulnerability and improvement strategy of power-information coupled networks considering cyber physical interaction is of great importance. A failure model of power-information coupled networks considering cyber physical interaction was proposed based on DC power flow model, to study influence of information component failure on process of cascading failure in power network and analyze vulnerability of the coupled networks. To reveal vulnerability of the coupled networks, based on degree and betweenness indices, influence of information network function and cyber physical coupling was considered by means of mapping and weighting. A criticality index was proposed to identify the key components exerting vital influence on vulnerability of the coupled networks. From the perspective of intensifying protection of critical components and reducing dependence of the coupled networks on critical components, critical component protection strategy and inter-link addition strategy were proposed to improve robustness of the coupled networks. Results show that the coupled networks were robust to random attack but vulnerable to malicious attack. High criticality information components were of vital importance to maintaining the function of information networks, and the coupled networks are vulnerable to attacks aiming at these components. By applying improvement strategy, high criticality information components were well protected and inter-links added to high weighted power nodes can effectively improve robustness of the coupled networks.

关 键 词：电力–信息耦合网络 信息物理交互 脆弱性分析 映射加权 改善策略 

分 类 号：TM721[电气工程—电力系统及自动化]