With the deepening deployment of information and communication technologies (ICT), the cyber network is playing an increasingly important role in determining the performance of a power system. In this paper, we assess the robustness of cyber-physical power systems and examine various impact factors on the system’s robustness. A model that integrates the operating characteristics of the physical network and the wide-area protection functions provided by the cyber network is proposed. Based on the model, cascading failure propagation processes in a cyber-physical power system triggered by initial failures are simulated. Two statistical metrics, the power outage risk and the cumulative power outage size distribution, are then used to quantify the robustness by processing numerous cascading failure simulation results. We conduct case studies on IEEE 57 Bus, IEEE 118 Bus, IEEE 145 Bus, and UIUC 300 Bus with the proposed method. Simulation results demonstrate the necessity to consider cyber coupling, the importance of developing advanced wide-area protection algorithms, and the threat posed by cyberattacks compromising the robustness of cyber-coupled power systems.

中文翻译：

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通过考虑广域保护功能来评估网络物理电力系统的鲁棒性


随着信息通信技术（ICT）的深入部署，网络在决定电力系统性能方面发挥着越来越重要的作用。在本文中，我们评估了网络物理电力系统的稳健性，并研究了对系统稳健性的各种影响因素。提出了一种融合物理网络运行特性和信息网络提供的广域保护功能的模型。基于该模型，模拟了信息物理电力系统中由初始故障触发的级联故障传播过程。然后，通过处理大量级联故障模拟结果，使用停电风险和累积停电规模分布这两个统计指标来量化鲁棒性。我们使用所提出的方法对 IEEE 57 总线、IEEE 118 总线、IEEE 145 总线和 UIUC 300 总线进行案例研究。仿真结果证明了考虑网络耦合的必要性、开发先进的广域保护算法的重要性，以及损害网络耦合电力系统鲁棒性的网络攻击所带来的威胁。