Results 51 to 60 of about 7,499 (272)

Power losses and reactive power in three-phase power supply system with symmetrical sinusoidal voltage source [PDF]

open access: yes, 2014
Для симметричных трехфазных четырехпроводных систем электроснабжения получена зависимость между дополнительными потерями энергии и среднеквадратичным значением модуля вектора мгновенной реактивной мощности.
Жемеров, Георгий Георгиевич   +1 more
core  

Droop Control of Distributed Electric Springs for Stabilizing Future Power Grid [PDF]

open access: yes, 2013
published_or_final_versio
Chaudhuri, B   +3 more
core   +2 more sources

Bias‐Free Highly Efficient and Stable Dye‐Sensitized Photoelectrochemical Cells via Cascade Charge Transfer

open access: yesAdvanced Functional Materials, EarlyView.
A buried‐junction DSPEC design is introduced that leverages cascade charge transfer to enhance efficiency, stability, and versatility. This approach facilitates effective charge transfer and minimizes recombination losses, leading to significant improvements.
Jun‐Hyeok Park   +8 more
wiley   +1 more source

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

open access: yesAdvanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner   +9 more
wiley   +1 more source

Enhancing Low‐Temperature Performance of Sodium‐Ion Batteries via Anion‐Solvent Interactions

open access: yesAdvanced Functional Materials, EarlyView.
DOL is introduced into electrolytes as a co‐solvent, increasing slat solubility, ion conductivity, and the de‐solvent process, and forming an anion‐rich solvent shell due to its high interaction with anion. With the above virtues, the batteries using this electrolyte exhibit excellent cycling stability at low temperatures. Abstract Sodium‐ion batteries
Cheng Zheng   +7 more
wiley   +1 more source

Evolución y desarrollo de los dispositivos compensadores de potencia reactiva

open access: yesRevista Científica de Ingeniería Energética, 2011
Desde el  propio surgimiento de los sistemas eléctricos de corriente alterna durante la segunda mitad delsiglo XIX, numerosos científicos advirtieron de los efectos nocivos del desfase de corriente y tensiónproducidos por la ...
Davel Borges Vasconcellos   +1 more
doaj  

Reactive Power Compensation Method Considering Minimum Effective Reactive Power Reserve

open access: yesIOP Conference Series: Materials Science and Engineering, 2017
According to the calculation model of minimum generator reactive power reserve of power system voltage stability under the premise of the guarantee, the reactive power management system with reactive power compensation combined generator, the formation of a multi-objective optimization problem, propose a reactive power reserve is considered the minimum
Yiyu Gong   +6 more
openaire   +1 more source

Different power supplies for different machines [PDF]

open access: yes, 2006
Each time a new accelerator is built, the question of the right choice of technology for the power supplies (PS) is raised again. No specific advice can be given since the demands on the units as well as the available budget have a strong influence on ...
Eckoldt, H J
core   +1 more source

Unraveling the Mg Loss Mechanism and Degradation Kinetics in Thermoelectric n‐Type Mg2Si‐Mg2Sn Solid Solutions

open access: yesAdvanced Functional Materials, EarlyView.
Mg‐based thermoelectrics are among the most promising candidates for power generation applications but their performance is compromised by Mg loss at device operation temperatures due to the higher chemical potential of Mg (μMg${\mu}_{\mathrm{Mg}}$) inside the material compared to the environment.
Aryan Sankhla   +2 more
wiley   +1 more source

Compensación de la potencia reactiva en sistemas de baja tensión mediante bancos de capacitores fijos, utilizando algoritmos genéticos; Reactive compensation in low voltaje power systems with fixed capaciyors banks using genetic algorithms

open access: yesRevista Científica de Ingeniería Energética, 2011
Una óptima selección de estos, presupone tres aspectos: la selección de la capacidad de los bancos, el tipo de compensador a utilizar, así como la ubicación en el sistema eléctrico de baja tensión Existen ...
Davel Borges Vasconcellos   +3 more
doaj  

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