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论文类型：期刊论文

发表时间：2009-12-01

发表刊物：SAFETY SCIENCE

收录刊物：SCIE、EI、ESI高被引论文、Scopus

卷号：47

期号：10

页面范围：1332-1336

ISSN号：0925-7535

关键字：Cascading failure; Attack; US power grid; Critical threshold; Tunable parameter

摘要：The vulnerability of real-life networks subject to intentional attacks has been one of the outstanding challenges in the study of the network safety. Applying the real data of the US power grid, we compare the effects of two different attacks for the network robustness against cascading failures, i.e., removal by either the descending or ascending orders of the loads. Adopting the initial load of a node j to be L-j = [k(j)(Sigma(m is an element of Gamma j)k(m))](alpha) with k(j) and Gamma(j) being the degree of the node j and the set of its neighboring nodes, respectively, where alpha is a tunable parameter and governs the strength of the initial load of a node, we investigate the response of the US power grid under two attacks during the cascading propagation. In the case of alpha < 0.7. our investigation by the numerical simulations leads to a counterintuitive finding on the US power grid that the attack on the nodes with the lowest loads is more harmful than the attack on the ones with the highest loads. In addition, the almost same effect of two attacks in the case of a = 0.7 may be useful in furthering studies on the control and defense of cascading failures in the US power grid. (c) 2009 Elsevier Ltd. All rights reserved.