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Blackout

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


Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors proposed a business model where utilities offer insurance to semi-independent, yet risk averse households against the prospect of a blackout, when a pay-as-you-go system is no longer available.

6 citations

Proceedings ArticleDOI
03 May 2016
TL;DR: This work focuses on the problem of blackout detection with specific interest for the WirelessHART standard, introducing a Blackout Detection Service (BDS) expressly addressed to multi-hop periodic communication with sensors and actuators.
Abstract: Communication blackout is one of the most serious pitfalls of Wireless Sensor Networks (WSN) in industrial automation context. The industrial radio channel exhibits pronounced effects of multipath fading and wireless LAN (WLAN) interference that can potentially lead to temporary communication failures, as well as complete isolation of network devices. The current IWSN standards adopt known countermeasures to cope with the harshness of the radio channel, but they lack solutions specifically oriented to detect blackouts and self-recover the communication fulfilling hard deadline constraints. In this work we focus on the problem of blackout detection with specific interest for the WirelessHART standard, introducing a Blackout Detection Service (BDS) expressly addressed to multi-hop periodic communication with sensors and actuators. The BDS monitors end-to-end acknowledgement messages and builds specific metrics to promptly identify communication outages, enabling three criticality classes. The algorithm is tested in the ns-2 network simulator and results show that the proposed system is able to detect blackout events with reaction delays of the order of 4–5 times the refresh rate of nodes and to discriminate between small and temporary network issues and serious blackout scenarios, opening the field for recovery strategies.

6 citations

01 Jul 2013
TL;DR: In this article, the authors proposed a new controlled islanding method for power grids based on the nonlinear Koopman Mode Analysis (KMA), which is a new analyzing technique of nonlinear dynamics.
Abstract: To view the electricity supply in our society as just sockets mountedin our walls with a constant voltage output is far from the truth. Inreality, the power system supplying the electricity or the grid, is themost complex man-made dynamical system there is. It demands severecontrol and safety measures to ensure a reliable supply of electric power.Throughout the world, incidents of widespread power grid failures havebeen continuously reported. The state where electricity delivery to customersis terminated by a disturbance is called a blackout. From a stateof seemingly stable operating conditions, the grid can fast derail intoan uncontrollable state due to cascading failures. Transmission linesbecome automatically disconnected due to power flow redirections andparts of the grid become isolated and islands are formed. An islandedsub-grid incapable of maintaining safe operation conditions experiencesa blackout. A widespread blackout is a rare, but an extremely costlyand hazardous event for society.During recent years, many methods to prevent these kinds of eventshave been suggested. Controlled islanding has been a commonly suggestedstrategy to save the entire grid or parts of the grid from a blackout.Controlled islanding is a strategy of emergency control of a powergrid, in which the grid is intentionally split into a set of islanded subgridsfor avoiding an entire collapse. The key point in the strategy is todetermine appropriate separation boundaries, i.e. the set of transmissionlines separating the grid into two or more isolated parts.The power grid exhibits highly nonlinear response in the case oflarge failures. Therefore, this thesis proposes a new controlled islandingmethod for power grids based on the nonlinear Koopman Mode Analysis(KMA). The KMA is a new analyzing technique of nonlinear dynamicsbased on the so-called Koopman operator. Based on sampled data followinga disturbance, KMA is used to identify suitable partitions of thegrid.The KMA-based islanding method is numerically investigated withtwo well-known test systems proposed by the Institute of Electrical andElectronics Engineers (IEEE). By simulations of controlled islanding inthe test system, it is demonstrated that the grid’s response following afault can be improved with the proposed method.The proposed method is compared to a method of partitioning powergrids based on spectral graph theory which captures the structural propertiesof a network. It is shown that the intrinsic structural propertiesof a grid characterized by spectral graph theory are also captured by theKMA. This is shown both by numerical simulations and a theoreticalanalysis.

6 citations

Proceedings ArticleDOI
01 Jan 2018
TL;DR: The proposed metric is applied to the real-world restoration data related to this disruptive event to measure and evaluate energy resilience in the SA grid and the effectiveness of the proposed framework in energy-resilience optimization is shown.
Abstract: Evaluation of a system resilience has a multidimensional nature that includes multifarious qualitative and quantitative aspects. This paper focuses on energy resilience in power systems and presents a novel quantitative metric, which aims to quantify the entire system behavior from pre-outage to post-outage stage. On September 28 2016, fierce tornado and lightning strikes caused multiple faults on the South Australian (SA) transmission system and led to a blackout in the entire state of South Australia. Load restoration data related to this event is collected from the Australian Energy Market Operator (AEMO) and is considered as the case study in this work. The proposed metric is applied to the real-world restoration data related to this disruptive event to measure and evaluate energy resilience in the SA grid. Furthermore, the effectiveness of the proposed framework in energy-resilience optimization is shown by detailed resilience-oriented problem formulation in power grids.

6 citations

Journal ArticleDOI
TL;DR: In this article , an improved version of ISAA, referred to as ISAA-ATF, is introduced to analyze the station blackout accident of PWR using ATF cladding.

6 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023178
2022355
202191
2020120
2019121
2018132