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Vulnerability Assessment For Power-Transportation Coupled Network Based On Topological Methods

With the rapid development of electric vehicles (EVs), the power system and the transportation system have become closely related. The interdependence between the power and transportation systems is getting increasing attention. In this paper, a two-layer network that couples the power and transportation systems is built based on the complex network (CN) theory for the vulnerability assessment of the coupled network. Node electrical betweenness is used to identify the critical components in the power network. The intentional attack strategy based on node electrical betweenness simulates the real network failures. The relative size of the largest remaining connected component and the efficiency of the network are used to evaluate the performance of the network before and after the attacks. An IEEE-39 bus power network coupled with an IEEE-14 node transportation network is studied to verify the feasibility of the proposed method. The result shows that the coupled network is vulnerable to intentional attacks.