Transient dynamics increasing network vulnerability to cascading failures.
نویسندگان
چکیده
We study cascading failures in networks using a dynamical flow model based on simple conservation and distribution laws. It is found that considering the flow dynamics may imply reduced network robustness compared to previous static overload failure models. This is due to the transient oscillations or overshooting in the loads, when the flow dynamics adjusts to the new (remaining) network structure. The robustness of networks showing cascading failures is generally given by a complex interplay between the network topology and flow dynamics.
منابع مشابه
Spatio-temporal propagation of cascading overload failures in spatially embedded networks
Different from the direct contact in epidemics spread, overload failures propagate through hidden functional dependencies. Many studies focused on the critical conditions and catastrophic consequences of cascading failures. However, to understand the network vulnerability and mitigate the cascading overload failures, the knowledge of how the failures propagate in time and space is essential but...
متن کاملAddressing vulnerability to cascading failure against intelligent adversaries in power networks
The blackout of August 14, 2003, showed that electric power grids are vulnerable to cascading failure. Since then, numerous methods of vulnerability analysis have been developed to help the owners and operators of power networks and other infrastructure systems protect them against possible catastrophic events (including attacks by intelligent adversaries). With cascading failures, even small a...
متن کاملReducing Cascading Failure Risk by Increasing Infrastructure Network Interdependency
Increased coupling between critical infrastructure networks, such as power and communications, has important implications for the reliability and security of these networks. To understand the implications of power-communications coupling, researchers have studied interdependent network models and reported that increased coupling can increase system vulnerability [1, 2]. However, these results c...
متن کاملModeling and Vulnerability Analysis of Cyber-Physical Power Systems Considering Network Topology and Power Flow Properties
Conventional power systems are developing into cyber-physical power systems (CPPS) with wide applications of communication, computer and control technologies. However, multiple practical cases show that the failure of cyber layers is a major factor leading to blackouts. Therefore, it is necessary to discuss the cascading failure process considering cyber layer failures and analyze the vulnerabi...
متن کاملCascading Model of Infrastructure Networks based on Complex Network
The paper focuses on the cascading failure phenomenon of infrastructure networks. A new cascading model is proposed to analyze the cascading failure characteristics of the systems. Based on the model, we present a good evaluation method of node importance to identify the key nodes which may cause cascading failures of infrastructure networks. Finally, the damage degree of infrastructure network...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Physical review letters
دوره 100 21 شماره
صفحات -
تاریخ انتشار 2008