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| Comparison of Cascading Failures Between Power Information Interdependent Networks and Single-Layer Power Grids |
| WU Lingjie, ZOU Yanli, WANG Ruirui, YAO Fei, WANG Yang
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| College of Electronic Engineering, Guangxi Normal University, Guilin 541004, China |
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Abstract The deep integration of electricity network and information networks can promote communication between networks, but also brings the risk of large-scale transmission of failures. Based on the grid structure and load characteristics, combined with the dispatching function of information network, we construct a "power-information interdependence network" model. Three types of node attack methods are applied to attack a single node of the power grid where the attacked node is the highest load node, the lowest load node or the highest capacity proportion node. The cascade effects are compared with single-layer power grid. Study shows that the robustness of the power information interdependent network is weaker than that of the single-layer power grid under the highest load node attack when the initial load is small. The robustness of the two kinds of networks approaches each other when the initial load is large. The difference in robustness of the two kinds of networks is not obvious at the lowest load node and highest capacity proportion node attack. On the interdependent network, the cascading failure caused by the highest load node attack is the most difficult to eliminate completely.
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Received: 06 August 2018
Published: 31 January 2019
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