Network topology and resilience analysis of South Korean power grid
- Authors
- Kim, Dong Hwan; Eisenberg, Daniel A.; Chun, Yeong Han; Park, Jeryang
- Issue Date
- Jan-2017
- Publisher
- ELSEVIER
- Keywords
- Complex network; Scale-free; Vulnerability; Robustness; Critical infrastructure
- Citation
- PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS, v.465, pp.13 - 24
- Journal Title
- PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
- Volume
- 465
- Start Page
- 13
- End Page
- 24
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/6202
- DOI
- 10.1016/j.physa.2016.08.002
- ISSN
- 0378-4371
- Abstract
- In this work, we present topological and resilience analyses of the South Korean power grid (KPG) with a broad voltage level. While topological analysis of KPG only with high-voltage infrastructure shows an exponential degree distribution, providing another empirical evidence of power grid topology, the inclusion of low voltage components generates a distribution with a larger variance and a smaller average degree. This result suggests that the topology of a power grid may converge to a highly skewed degree distribution if more low-voltage data is considered. Moreover, when compared to ER random and BA scale free networks, the KPG has a lower efficiency and a higher clustering coefficient, implying that highly clustered structure does not necessarily guarantee a functional efficiency of a network. Error and attack tolerance analysis, evaluated with efficiency, indicate that the KPG is more vulnerable to random or degree-based attacks than betweenness-based intentional attack. Cascading failure analysis with recovery mechanism demonstrates that resilience of the network depends on both tolerance capacity and recovery initiation time. Also, when the two factors are fixed, the KPG is most vulnerable among the three networks. Based on our analysis, we propose that the topology of power grids should be designed so the loads are homogeneously distributed, or functional hubs and their neighbors have high tolerance capacity to enhance resilience. (C) 2016 Elsevier B.V. All rights reserved.
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Collections - College of Engineering > Civil and Environmental Engineering > Journal Articles
- College of Engineering > School of Electronic & Electrical Engineering > 1. Journal Articles
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