期刊
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
卷 125, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijepes.2020.106486
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This paper extends the definition of Small-worldness to weighted complex networks and assesses it to determine the robustness of Cyber-physical Critical Infrastructure Systems (CPCIS) and identify system critical components. By incorporating uncertain parameters and assessing small-world property indices in dynamic forms, real-time uncertain criticalities are represented and evaluated. The most critical physical and cyber system components are identified, and their dependencies on each other are determined.
This paper extends the definition of Small-worldness to weighted complex networks and uses it to assess the robustness of Cyber-physical Critical Infrastructure Systems (CPCIS) and consequently to identify system critical components. System uncertain parameters - electric power system loading and communication network latency, are first incorporated in the model, and small-world property indices - Characteristic Path Length, Clustering Coefficient, and small-worldness are assessed in their dynamic (time-varying) forms to represent real-time uncertain criticalities, evaluated using probability distribution functions. The most critical physical and cyber system components are then identified, and their dependencies on physical and/or cyber system are identified. It was clearly demonstrated that the CPCIS components are mutually dependent on each other and that this dependency (represented by the drop of dynamic small-worldness in one system if a failure occurs in the other system) might vary from bus to bus. The proposed methodology is illustrated on a realistic interconnected 1326-bus transmission network and 88 bus star connected ICT network, divided into 6 control zones.
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