Don’t go chasing artificial waterfalls: Artificial line limits and cascading failures in power grids
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Cascading failures in power grids PAUL
IEEE POTENTIALS 0278-6648/09/$26.00 © 2009 IEEE Few people consider the complexity of power grid operation when they flip a switch to light a room. Power grids provide electricity to billions of individuals around the globe, often with higher than 99.9% reliability. Because the social structures in most developed countries rely on high-reliability electricity, massive social disruption can resu...
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In the past, we have observed several large blackouts, i.e. loss of power to large areas. It has been noted by several researchers that these large blackouts are a result of a cascade of failures of various components. As a power grid is made up of several thousands or even millions of components (relays, breakers, transformers, etc.), it is quite plausible that a few of these components do not...
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The stability and reliability of electrical power grids are essential for the continuous operation of modern cities and also critical for preparedness, response, recovery and mitigation in emergence management. Due to the fact that present power grids in China are usually running near their critical operation points, they are vulnerable and sensitive to disturbances from natural and man-made ha...
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Sudden failure of a single transmission element in a power grid can induce a domino effect of cascading failures, which can lead to the isolation of a large number of consumers or even to the failure of the entire grid. Here we present results of the simulation of cascading failures in power grids, using an alternating current (AC) model. We first apply this model to a regular square grid topol...
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In this paper, we study cascading failures in power grids under the nonlinear AC and linearized DC power flow models. We numerically compare the evolution of cascades after single line failures under the two flow models in four test networks. The cascade simulations demonstrate that the assumptions underlying the DC model (e.g., ignoring power losses, reactive power flows, and voltage magnitude...
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ژورنال
عنوان ژورنال: Chaos: An Interdisciplinary Journal of Nonlinear Science
سال: 2019
ISSN: 1054-1500,1089-7682
DOI: 10.1063/1.5115493