Structural vulnerability of power systems: A topological approach |
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Authors: | Ettore BompardAuthor Vitae Di WuAuthor VitaeFei XueAuthor Vitae |
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Affiliation: | a Dipartimento di Ingegneria Elettrica, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy b XJ Group Corporation, No. 5 Shangdixinxi Road, Haidian District, Beijing 100085, China |
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Abstract: | Vulnerability analysis of power systems is a key issue in modern society and many efforts have contributed to the analysis. Complex network metrics for the assessment of the vulnerability of networked systems have been recently applied to power systems. Complex network theory may come in handy for vulnerability analysis of power systems due to a close link between the topological structure and physical properties of power systems. However, a pure topological approach fails to capture the engineering features of power systems. So an extended topological method has been proposed by incorporating several of specific features of power systems such as electrical distance, power transfer distribution factors and line flow limits. This paper defines, starting from the extended metric for efficiency named as net-ability, an extended betweenness and proposes a joint method of extended betweenness and net-ability to rank the most critical lines and buses in an electrical power grid. The method is illustrated in the IEEE-118-bus, IEEE-300-bus test systems as well as the Italian power grid. |
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Keywords: | Power system vulnerability Power flow limits Complex networks Betweenness Net-ability Topological vulnerability Criticality ranking |
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