基于动态攻防博弈的电力信息物理融合系统脆弱性评估

以电力信息物理融合系统受人为因素攻击为背景,应用博弈论的相关知识对现代电网在遭受人为主观攻击威胁下的电网脆弱性评估方法进行了研究和探讨。根据兰德公司的风险评估模型建立了电力信息物理融合系统基于攻防场景的脆弱性评估框架,并基于博弈论中用于描述动态攻防博弈的多层数学规划模型,提出一种电力物理网络和电力信息网络同时遭受人为攻击场景下的电网攻防动态博弈三层数学规划模型。针对所提出的模型,给出了相应的解算方法,并在求解过程中,应用一种最优的防御资源分配策略以有效求得电网元件上需分配的资源。最后,通过简单算例系统验证了本文所提模型与方法的有效性。

Vulnerability Assessment of Cyber Physical Power System Based on Dynamic Attack-defense Game Model

This article aims to explore and exploit the vulnerability assessment method of modern power grid facing deliberate attack by applying relevant knowledge of the game theory in the scenario of cyber physical power system under the threat of deliberate attack. The vulnerability assessment framework of cyber physical power system pertinent to the attack-defense scenario is built based on Rand Corporation''s risk assessment model, and a power system attack-defence dynamic game tri-level programming model in which cyber and physical attacks are launched simultaneously is proposed according to the multi-level programming model generally applied in the game theory. The corresponding solving method of the tri-level programming model is discussed and, in the process of solution, a kind of optimal defense resource allocation strategy is used to effectively obtain the resource required on the components of the power grid. The effectiveness and validity of the proposed framework and method are demonstrated by application examples. This work is supported by National Basic Research Program of China(973 Program)(No. 2013CB228203-5).