Topic
Blackout
About: Blackout is a research topic. Over the lifetime, 2088 publications have been published within this topic receiving 30433 citations.
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TL;DR: In this paper, the authors discuss techniques for improving the system security with respect to the minimum singular value index (SVI) and present a continuation technique that redistributes the system generation to the optimal operating condition.
Abstract: The problem of system collapse or blackout characterized by a local severe voltage depression is generally believed to be associated with inadequate VAR support at key busses. The authors discuss techniques for improving the system security with respect to this index. The effect of adding capacitors are examined. They also present a continuation technique that redistributes the system generation to the optimal operating condition with respect to the minimum singular value index. >
321 citations
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TL;DR: It is concluded that evaluating vulnerability in power networks using purely topological metrics can be misleading, and the vulnerability metrics for individual simulations show only a mild correlation.
Abstract: In order to identify the extent to which results from topological graph models are useful for modeling vulnerability in electricity infrastructure, we measure the susceptibility of power networks to random failures and directed attacks using three measures of vulnerability: characteristic path lengths, connectivity loss, and blackout sizes. The first two are purely topological metrics. The blackout size calculation results from a model of cascading failure in power networks. Testing the response of 40 areas within the Eastern U.S. power grid and a standard IEEE test case to a variety of attack/failure vectors indicates that directed attacks result in larger failures using all three vulnerability measures, but the attack-vectors that appear to cause the most damage depend on the measure chosen. While the topological metrics and the power grid model show some similar trends, the vulnerability metrics for individual simulations show only a mild correlation. We conclude that evaluating vulnerability in power networks using purely topological metrics can be misleading.
313 citations
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TL;DR: The tolerance of electric power grids to both accidental and malicious outages is analyzed in the framework of complex network theory, and the quantity known as efficiency is modified by introducing a new concept of distance between nodes called net-ability.
Abstract: Power grids exhibit patterns of reaction to outages similar to complex networks. Blackout sequences follow power laws, as complex systems operating near a critical point. Here, the tolerance of electric power grids to both accidental and malicious outages is analyzed in the framework of complex network theory. In particular, the quantity known as efficiency is modified by introducing a new concept of distance between nodes. As a result, a new parameter called net-ability is proposed to evaluate the performance of power grids. A comparison between efficiency and net-ability is provided by estimating the vulnerability of sample networks, in terms of both the metrics.
309 citations
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TL;DR: In this article, the authors verify and examine criticality in a 1000 bus network with an AC blackout model that represents many of the interactions that occur in cascading failure and evaluate the overall probability and risk of blackouts from a global perspective.
293 citations
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TL;DR: In this paper, the authors discuss the design of a restructured electric distribution network that employs a large number of small distributed energy resources (DER) units, which can improve the level of system reliability and provide service differentiations.
Abstract: The blackout experiences have demonstrated the vulnerability of the interconnected electric power system to grid failure caused by natural disasters and unexpected phenomena. Changes in customer needs, additional stress due to liberalized electricity markets, and a high degree of dependency of today's society on sophisticated technological services also intensify the burden on traditional electric systems and demand for a more reliable and resilient power delivery infrastructure. This paper discusses the design of a restructured electric distribution network that employs a large number of small distributed energy resources (DER) units, which can improve the level of system reliability and provide service differentiations.
292 citations