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Modelling cascading failure of a CPS for topological resilience enhancement

机译：用于拓扑弹性增强CPS的级联失效模拟

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摘要

This study focuses on the cyber-physical system (CPS) consisting of interdependent electrical distribution and communication networks, where the two networks are mutually dependent. A small disturbance in either of them can trigger a cascade of faults within the entire network. To investigate the failure mechanism, first, two features that affect topological resilience (TR) are defined in this study: adaptation and recovery abilities. Second, the authors model the process of cascading failures that occur in this coupled system by introducing and developing the infrastructure interdependencies simulator. The process of cascading failures is based on percolation theory, and they present a detailed analysis of cascading failure in a standard IEEE 33-bus system coupled with the 33-node communication system. This study proves that the adaptation ability of a coupled system is even lower than a single system. This is due to the interdependencies between systems, and the study of the failure mechanisms helps planers to make a better decision in the recovery process. Finally, the modified shortest path search is used to optimise the repair sequence. Their numerical results validate that the recovery ability of the coupled system is increased through the optimisation, which contributes to the TR enhancement.
机译：本研究侧重于由相互依存的电气分配和通信网络组成的网络物理系统（CPS），其中两个网络相互依赖。其中任何一个的小扰动都可以触发整个网络内的级联故障。为了研究失败机制，首先，在本研究中定义了影响拓扑弹性（TR）的两个特征：适应和恢复能力。其次，作者模拟了通过引入和开发基础设施相互依赖的模拟器来实现该耦合系统中发生的级联故障的过程。级联故障的过程基于渗透理论，并且它们在与33节点通信系统耦合的标准IEEE 33-母线系统中对级联失败的详细分析。本研究证明，耦合系统的适应能力甚至低于单个系统。这是由于系统之间的相互依存性，并且失败机制的研究有助于刨床在恢复过程中做出更好的决定。最后，修改后的最短路径搜索用于优化修复序列。它们的数值结果验证了耦合系统的恢复能力通过优化增加，这有助于TR增强。

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