Results 91 to 100 of about 506,427 (304)

Power-Based Droop Control in DC Microgrids Enabling Seamless Disconnection From Upstream Grids [PDF]

, 1997
This paper proposes a local power-based droop controller for distributed energy resource converters in dc microgrids that are connected to upstream grids by grid-interface converters.
Atherton, C., Bakwin, P., Brasseur, G., Carroll, M., Dickerson, R., Doddridge, B., Emmons, L., Gerbig, C., Hauglustaine, D., Honrath, R., Hubler, G., Jacob, D., Jaffe, D., Kondo, Y., Levy, H., Munger, J., Penner, J., Rohrer, F., Sillman, S., Torres, A., VanVelthoven, P., Volz-Thomas, A., Wang, Y., Wauben, W.   +23 more
core   +1 more source

A modular multi-level DC-DC converter for HVDC grids

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016
A double-T DC-DC modular multilevel converter (DC-DC-MMC) topology for high-voltage dc (HVdc) applications is presented in this paper. The topology is intended to interconnect large power dc grids with different voltage levels or to control the power flow in meshed dc grids. A two level control hierarchy is used to regulate the dc voltage of each cell.
Vidal-Albalate, Ricardo, Barahona, Javier, Soto-Sanchez, Diego, Belenguer, Enerique, Pena, Ruben S, Blasco-Gimenez, Ramon, de la Parra, Hector Zelaya   +6 more
openaire   +3 more sources

Water Permeates and Plasticizes Amorphous Carbon Dots: Unraveling the Inner Accessibility of the Nanoparticles by Glass Transition Studies

Advanced Materials, EarlyView.
The water permeability of amorphous carbon dots (CDs) is demonstrated by investigating their plasticization. Novel polyamide‐based and amorphous nanoparticles are synthesized by controlling their inner packing density. Water plasticization is evidenced by the decrease of the CDs glass transition temperature with increasing the hydration degree.
Elisa Sturabotti, Valerio Di Lisio, Lucia Cardo, Alessandro Camilli, Estela Moretón Alfonsín, Daniele Cangialosi, Amaia Iturrospe Ibarra, Arantxa Arbe, Maurizio Prato   +8 more
wiley   +1 more source

A new grid side inertia support control method for cascaded power converters in Bi-directional EV chargers

Frontiers in Energy Research
To provide inertia support to the power grid, the grid side frontend DC/AC inverter of the bidirectional electric vehicle (EV) charging facilities can use the virtual synchronous generator (VSG) control in its grid-side DC/AC converter.
Yan Tian, Bo Huang, Jian Fang, Wei Chen, Yu Xin, Haobo Lin, Xiang Lin   +6 more
doaj   +1 more source

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Impedance-Based Stability Analysis of a Low-Inertia AC Grid Connected to a DC Grid by a VSC With Virtual Inertia Controllers

IEEE Open Journal of Power Electronics
The dynamics and performance of low-inertia ac grids with frequency support (e.g., droop and virtual inertia controls) have been investigated thoroughly.
Ahmed M.E.I. Mohamad, Hassanien Ramadan A. Mohamed, Yasser Abdel-Rady I. Mohamed   +2 more
doaj   +1 more source

2D Co‐Mo‐Hydroxide‐Based Multifunctional Material for the Development of H2‐Based Clean Energy Technologies

Advanced Materials, EarlyView.
2D α‐Co(OH)2 interleaved with Mo species displays an appealing dual functionality for the production and use of green hydrogen.Mo incorporation greatly benefits the electrochemical behaviour in Oxygen Evolution Reaction for H2 production, while the magnetocaloric response at liquid H2 temperature paves the way for alternative cryogenic refrigerants ...
Daniel Muñoz‐Gil, Celia Castillo‐Blas, Dawid Krystian Feler, Isabel Gómez‐Recio, Miguel Tinoco, Ana Querejeta‐Fernández, Rodrigo González‐Prieto, Felipe Gándara, Romualdo Santos Silva Jr, Pilar Ferrer, Carlos Prieto, Luc Lajaunie, José Luis Martinez‐Peña, María Luisa Ruiz‐González, José María González‐Calbet   +14 more
wiley   +1 more source

Investigation of Impacts of Wind Source Dynamics and Stability Options in DC Power Systems With Wind Energy Conversion Systems

IEEE Access, 2020
Wind energy conversion systems (WECSs), based on permanent magnet synchronous generators (PMSGs), are becoming common sources in dc grids. However, in previous dc grids integration studies, turbine-generator mechanical dynamics are represented by a ...
Ahmed M. I. Mohamad, Mohammadreza Fakhari Moghaddam Arani, Yasser Abdel-Rady I. Mohamed   +2 more
doaj   +1 more source

Multigrid solver for axisymmetrical 2D fluid equations

, 2005
We have developed an efficient algorithm for steady axisymmetrical 2D fluid equations. The algorithm employs multigrid method as well as standard implicit discretization schemes for systems of partial differential equations.
J.M. Byskov, L. Drori, L. Liu, O. Angelsmark, O. Kullmann, P. Crescenzi, V. Dahllöf, V. Dahllöf   +7 more
core   +1 more source

A current source inverter with series connected AC capacitors for photovoltaic application with grid fault ride through capability [PDF]

, 2009
The current source inverter (CSI) is preferred to interface a renewable source such photovoltaics (PV) to the AC power grid because it can provide smooth current source in the DC side, which fits to the PV behaviour and also steps-up the voltage from DC ...
Klumpner, Christian, Photong, Chonlatee, Wheeler, Patrick   +2 more
core   +1 more source