Results 11 to 20 of about 2,859,852 (278)

Black Start Restoration of Islanded Droop-Controlled Microgrids [PDF]

open access: yesEnergies, 2020
The electricity grid faces the possibility of outages due to extreme weather events, cyber-attack, and unexpected events. When these unwanted events occur, it is desired that electricity be restored as soon as possible to meet the power demands of ...
Ogbonnaya Bassey, Karen L. Butler-Purry
doaj   +2 more sources

Two-Stage Black-Start Optimization for Power Systems with Multi-Energy Microgrid as a Black-Start Unit

open access: yesShanghai Jiaotong Daxue xuebao
To reduce the losses caused by major power outages in power systems, a two-stage optimization method for black start of power systems is proposed using a multi-energy microgrid (MEMG) as a black-start source.
ZHU Yongqing, CHEN Changming, LI Qingsheng, LI Zhen, ZHANG Zhaofeng, LIN Zhenzhi
doaj   +2 more sources

Black Start Strategy for PV-ESS Multi-Microgrids with Three-Phase/Single-Phase Architecture

open access: yesEnergies, 2016
With the rapid development of microgrids (MGs) in recent years, it is anticipated that combinations of multiple microgrids—multi-microgrids (MMGs)—will gradually become a new form of power grid.
Zhirong Xu   +4 more
doaj   +2 more sources

Energy storage for black start services: A review [PDF]

open access: yesInternational Journal of Minerals, Metallurgy and Materials, 2022
AbstractWith the increasing deployment of renewable energy-based power generation plants, the power system is becoming increasingly vulnerable due to the intermittent nature of renewable energy, and a blackout can be the worst scenario. The current auxiliary generators must be upgraded to energy sources with substantially high power and storage ...
Zhao, Yanqi   +7 more
openaire   +1 more source

Starting with I: Combating Anti-Blackness in Libraries [PDF]

open access: yesMedical Reference Services Quarterly, 2021
When millions saw footage of George Floyd's murder by police during the COVID-19 pandemic where marginalized groups had higher death rates, increased awareness and action arose because Black people are treated differently in the United States. Many libraries subsequently created statements and committees to commit to reduce inequities in libraries ...
Peace Ossom-Williamson   +4 more
openaire   +2 more sources

Performance Evaluation of a BESS Unit for Black Start and Seamless Islanding Operation

open access: yesEnergies, 2022
The main purpose of this paper is to evaluate the overall performance of a battery energy storage system (BESS) during (I) grid-connected, (II) black start, and (III) islanded operating modes.
Seyedmahdi Izadkhast   +4 more
doaj   +1 more source

Black Hole Thermodynamics from the point of view of Superstring Theory [PDF]

open access: yes, 1997
In this review we try to give a pedagogical introduction to the recent progress in the resolution of old problems of black hole thermodynamics within superstring theory. We start with a brief description of classical black hole dynamics.
Banks T.   +11 more
core   +3 more sources

Stratified Optimization Strategy Used for Restoration With Photovoltaic-Battery Energy Storage Systems as Black-Start Resources

open access: yesIEEE Access, 2019
With the rapid growth of installed capacity of photovoltaic (PV), the PV power stations equipped with energy storage (ES) have become a new type of black-start power supply.
Junhui Li   +5 more
doaj   +1 more source

Risks in the European Transmission System and a Novel Restoration Strategy for a Power System after a Major Blackout

open access: yesApplied Sciences, 2022
Many citizens of European countries may soon experience a long and extensive blackout. The lack of predictability in the output of renewable energy sources, aggravating the problem of consistently matching supply with demand on electric grids, along with
Georgios Fotis   +2 more
doaj   +1 more source

On choosing the start time of binary black hole ringdown [PDF]

open access: yes, 2017
The final stage of a binary black hole merger is ringdown, in which the system is described by a Kerr black hole with quasinormal mode perturbations. It is far from straightforward to identify the time at which the ringdown begins.
Ballmer, Stefan W.   +6 more
core   +3 more sources

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