Results 101 to 110 of about 30,648 (309)

Development of a grid emulator for network integration studies

, 2014
Includes bibliographical references.The economic and environmental side effects of fossil fuels have forced governments and authorities to investigate sustainable solutions. Main interest is focused on environment friendly benefits, provided by renewable
Khan, Akrama
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Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Small Signal Analysis of Rotating Reference Frame Based Synchronization Control for Microgrid to Grid Changeover

Eletrônica de Potência
Reliable synchronization is essential for ensuring stability during the transition of microgrids between islanded and grid-connected operation, particularly in converter-dominated lowinertia systems.
Deepak Gehlot , Shoubhik Mukherjee, A.S. Krishna Priya, Mukesh Kumar Pathak   +3 more
doaj   +1 more source

Recent advances in High-Voltage direct-current power transmission systems

, 2006
The ever increasing progress of high-voltage high-power fully-controlled semiconductor technology continues to have a significant impact on the development of advanced power electronic apparatus used to support optimised operations and efficient ...
Nikolas Flourentzou, Demetriades, G.D., Vassilios G. Agelidis, Georgios D. Demetriades, Flourentzou, N., Agelidis, V.G.   +5 more
core   +1 more source

Resolving the Structural Duality of Graphene Grain Boundaries

Advanced Materials, EarlyView.
Cantilever ncAFM resolves the atomic structure of grain boundaries in graphene, revealing coexisting stable and metastable types. Both contain pentagon/heptagon defects, but metastable GBs show irregular geometries. Modeling shows metastable GBs form under compression, exhibiting vertical corrugation, while stable GBs are flat.
Haojie Guo, Emiliano Ventura‐Macías, Mariano D. Jiménez‐Sánchez, Nicoleta Nicoara, Pierre Mallet, Jean‐Yves Veuillen, Vincent T. Renard, Antonio J. Martínez‐Galera, Pablo Pou, Julio Gómez‐Herrero, Rubén Pérez, Iván Brihuega   +11 more
wiley   +1 more source

Impact of DC-Link Dynamics on Shaft Damping and Grid Frequency Coupling in Doubly Fed Induction Generator Wind Turbines: Mechanism Analysis and a Suppression Strategy

Energies
In this paper, we address shaft oscillations and grid-connected oscillation frequency coupling in doubly fed induction generators (DFIGs) under DC-link dynamics.
Zheng Wang, Yimin Lu
doaj   +1 more source

Mixed H2 / H∞ optimal control for three-phase Grid Connected Converter

, 2015
Three-phase Grid Connected Converter (GCC), which acts as an important component for integrating the renewable energy into the smart grid, are attracting a great deal of attention.
Bian J(卞晶), Li ZW(李忠文), Yu HB(于海斌), Li HP(李鹤鹏), Zeng P(曾鹏), Zang CZ(臧传治)   +5 more
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Inertia emulation control of VSC-HVDC transmission system

, 2011
The increasing penetration of power electronics interfaced renewable generation (e.g. offshore wind) has been leading to a reduction in conventional synchronous-machine based generation.
Roscoe, Andrew, Jiebei Zhu, Adam, Grain Philip, Grain P. Adam, Zhu, Jiebei, Andrew J. Roscoe, Booth, Campbell, Campbell D. Booth   +7 more
core   +1 more source

Tuning Amorphous‐Crystalline Catalytic Interfaces by Mechanochemistry: Cu‐Based Metallic Glasses Coupled with Ceria for CO Oxidation

Advanced Materials, EarlyView.
Ball‐milling Cu‐based metallic glasses with ceria creates a unique nanostructure where metallic glass particles are wrapped by CeO2 nanoparticles. The intimate integration triggers copper state reorganization during reaction and aging, boosting CO oxidation and COPrOx activity.
Maahin Mirzay‐Shahim, Mehran Nabahat, Laia Pascua‐Solé, Isabel Serrano, Ilaria Lucentini, Xènia Garcia, Marina Armengol‐Profitós, Asier Agrelo‐Lestón, Ignasi Burgués‐Ceballos, Núria J. Divins, Ignacio J. Villar‐Garcia, Virginia Pérez‐Dieste, Carlos Escudero, Carlo Marini, Jordi Llorca, Eloi Pineda, Pere Bruna, Lluís Soler   +17 more
wiley   +1 more source

Tecnologias GRID para bibliotecas digitais

, 2008
Mestrado em Engenharia Electrónica e TelecomunicaçõesEste trabalho teve como objectivo, numa primeira fase fazer um estudo das tecnologias Grid existentes, essencialmente para a plataforma Windows.
Arvins, Eduardo Nuno de Jesus
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