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 apply the rare event simulation technique of splitting to the problem of estimating large-scale blackout probabilities, which is computationally intractable when the events of interest are extremely rare.
30 citations
TL;DR: In this article, the authors estimate the inconvenience costs stemming from both an unannounced and an announced rolling blackout, and find that the inconvenience cost of a sudden rolling blackout is estimated at 3900.67 KRW (3.56 USD) per month per household, while that of an announcement rolling blackout stands at 3102.95KRW (2.83 USD).
29 citations
TL;DR: In this article, the causes and effects of frequent and unannounced electricity blackouts on the operations of micro and small scale industries (MSI) in Kumasi, Ghana were examined.
Abstract: The aim of this paper was to examine the causes and effects of the frequent and unannounced electricity blackouts on the operations of micro and small scale industries (MSI) in Kumasi, Ghana. Data from a sample of 320 MSI selected from three industrial clusters in the Kumasi metropolis, revealed that the frequent and unannounced blackouts have caused a deficit of about 5.3% in the quantity of electricity they required for continuous operations. The blackout hours were estimated to last for an average of 10.3 hours per month. As a consequence of the blackouts, about 44% of the MSI spent this duration in redundancy because of lack of alternative sources of electricity but maintained the same labour cost. The remaining 56% of the MSI obtained power from alternative sources which required an average of GH¢15.5 per month to run. The paper concludes that uninterrupted electricity supply is vital for the effectiveness of the MSI.
29 citations
01 Jan 2012
TL;DR: A simplified simulation model was established with DIgSILENT Power Factory to reproduce the grid behavior when the blackout occurred as discussed by the authors, and policy and strategies were recommended to enhance the grid security and robustness.
Abstract: Grid disturbances occurred on 30th and 31st of July 2012 leaving millions of Indians in the dark for hours. It was understood that in the blackout that occurred on 31st of July, hydro power was slowed down which led to inadequate power generation while people overdrew more power for cooling off since the temperature was extremely high. This paper investigates the main reasons for the occurrence of the blackout. A simplified simulation model was established with DIgSILENT Power Factory to reproduce the grid behavior when the blackout occurred. After the sensitivity analysis, policy and strategies are recommended to enhance the grid security and robustness at the end of the paper. (6 pages)
29 citations
01 Jan 2006
TL;DR: In this paper, a statistical estimator is proposed to measure the extent to which load shedding is propagated in electric power transmission systems, using data from a series of simulated blackouts.
Abstract: Load power is progressively shed as large, cascading blackouts of electric power transmission systems evolve. We pro- pose a statistical estimator to measure the extent to which the load shedding is propagated. The estimator uses data from a series of simulated blackouts. The estimator is derived from a continuous state branching process that is a high level probabilistic model of the cascading process. The estimator is tested on failure data generated by a power system model of cascading line outages. The estimates for propagation of load shed are consistent with estimates for the propagation of line outages. Estimating the initial load shed and the propagation of load shed leads to estimates of the probability distribution of blackout size. This work opens up possibilities of monitoring infrastructure failures to quantify the vulnerability to cascading and the overall risk of large cascading failures.
29 citations