Blackout

About: Blackout is a research topic. Over the lifetime, 2088 publications have been published within this topic receiving 30433 citations.

Emergence of Scale-Free Blackout Sizes in Power Grids

Abstract: We model power grids as graphs with heavy-tailed sinks, which represent demand from cities, and study cascading failures on such graphs. Our analysis links the scale-free nature of blackout sizes to the scale-free nature of city sizes, contrasting previous studies suggesting that this nature is governed by self-organized criticality. Our results are based on a new mathematical framework combining the physics of power flow with rare event analysis for heavy-tailed distributions, and are validated using various synthetic networks and the German transmission grid.

Effect of Load Shedding Strategy on Interconnected Power Systems Stability When a Blackout Occurs

Abstract:  Abstract—From the long time ago properly and reliable operation of power systems were being the major portion of designer's and operators concernment In the interconnected power systems voltage and frequency of system are most significant parameters for analysis the power system operation In this paper sudden blackouts in a supposition interconnected power system will be simulate and effect of under frequency load shedding to restore the power system in stable condition will be study

The Hierarchical Smart Home Cyberattack Detection Considering Power Overloading and Frequency Disturbance

Abstract: The concept of smart home has recently gained significant popularity. Despite that it offers improved convenience and cost reduction, the prevailing smart home infrastructure suffers from vulnerability due to cyberattacks. It is possible for hackers to launch cyberattacks at the community level while causing a large area power system blackout through cascading effects. In this paper, the cascading impacts of two cyberattacks on the predicted dynamic electricity pricing are analyzed. In the first cyberattack, the hacker manipulates the electricity price to form peak energy loads such that some transmission lines are overloaded. Those transmission lines are then tripped and the power system is separated into isolated islands due to the cascading effect. In the second cyberattack, the hacker manipulates the electricity price to increase the fluctuation of the energy load to interfere the frequency of the generators. The generators are then tripped by the protective procedures and cascading outages are induced in the transmission network. The existing technique only tackles overloading cyberattack while still suffering from the severe limitation in scalability. Therefore, based on partially observable Markov decision processes, a hierarchical detection framework exploring community decomposition and global policy optimization is proposed in this work. The simulation results demonstrate that our proposed hierarchical computing technique can effectively and efficiently detect those cyberattacks, achieving the detection accuracy of above 98%, while improving the scalability.

How a smarter grid could have prevented the 2003 U.S. cascading blackout

Abstract: The electrical grid is caught in a political and technological energy war over what can most efficiently, safely, reliably and cost effectively provide commercial power for an increasing national load. The answer lies in research of the 2003 Northeast Blackout and introducing an emerging technology; Smart Grid (SG). This paper summarizes the blackout's key events, driving factors and tipping point for its cascade in order to highlight the critical benefits of Smart Grid Technology (SGT). Industry research suggests that SG could have prevented the cascade, had it been complete and implemented in 2003. This paper presents the essential elements of SGT (with industry research ongoing) that can achieve three things; (1) prevent cascading blackouts of this magnitude, (2) recover as quickly as possible from emergencies (terrorist attacks, natural disasters, etc.), and (3) provide a solution to this energy war with a portfolio of energy technologies.

Confected conflict in the wake of the South Australian blackout: Diversionary strategies and policy failure in Australia's energy sector

Abstract: In late September 2016, a severe thunderstorm and tornado outbreak hit the state of South Australia, causing a state-wide blackout. In its immediate aftermath, conservatives in Australia's media and political parties began laying blame for the blackout on the state's significant wind-power capacity, while criticizing South Australia and other Labor states for promoting renewable energy targets which are ‘unrealistic’ and a ‘threat to energy security’. Despite receiving advice from its own public servants, independent experts and industry players that these criticisms are wrong, the Coalition Government has sought to use the blackout as the foundation for an anti-renewables, pro-coal energy campaign. Although this strategy was clearly intended to provide a distraction from its other problems, and was partially assisted by the way in which subsequent assessments of the causes of the blackout were represented by the relevant agency and some elements of the media, it has instead served to highlight the Coalition's failure to create a coherent energy policy, or to adequately address the significant challenges currently facing Australia's electricity network. Both of these policy failures are directly attributable to its dedication to protecting incumbent fossil fuel interests, while denying the role played by fossil fuels in driving climate change.