Results 61 to 70 of about 8,449 (262)
Investigations on the safe stroke of mechanical HVDC vacuum circuit breaker
The Journal of Engineering, 2019 Here, a DC vacuum arc interruption test based on the hybrid high-speed actuator and the method of commutation is carried out in the synthetic loop system. The safe stroke is one of the basic breaking parameters.
Ning Xia +5 more
doaj +1 more source
Reduced DC circuit breaker requirement on mixed converter HVDC networks [PDF]
, 2015 © 2015 IEEE.Recently proposed meshed HVDC networks include both converters and DC circuit breakers, and the fault currents experienced and therefore the capacity requirement of circuit breakers are dependent on the topology of converters used on the ...
Chaffey, G, Green, TC
core +1 more source
Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges
Advanced Functional Materials, EarlyView.Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky +3 more
wiley +1 more source
2D Magnetic and Topological Quantum Materials and Devices for Ultralow Power Spintronics
Advanced Functional Materials, EarlyView.2D magnets and topological quantum materials enable ultralow‐power spintronics by combining robust magnetic order with symmetry‐protected, Berry‐curvature‐driven transport. Fundamentals of 2D anisotropy and spin‐orbit‐coupling induced band inversion are linked to scalable growth and vdW stacking.
Brahmdutta Dixit +5 more
wiley +1 more source
IEEE AccessConsidering the voltage source characteristics of the converters in the flexible DC grid, the current-limiting reactors are usually placed on the DC line terminals to limit the fault current rising speed.
Yingqing Ma +5 more
doaj +1 more source
Experimental Modeling of Forward Recovery Characteristics of IGBT for DC Circuit Breaker
Zhongguo dianli, 2021 DC circuit breaker is the main means to clear the faults in VSC-HVDC power grid. Before action of the hybrid DC circuit breaker, the IGBT in the transfer branch is in a state of zero voltage and zero current.
Hong SHEN +4 more
doaj +1 more source
Evaluation of a Local Fault Detection Algorithm for HVDC Systems [PDF]
, 2019 A great increase in the amount of energy generated from clean and renewable sources integrated in the electric power system is expected worldwide in the coming years.
Eguia Lopez, P. +4 more
core +2 more sources
Advanced Functional Materials, EarlyView.A robust solid‐state protein junction with a semi‐transparent eC/Au electrode allows photoexcitation of the bacterio‐rhodopsin, bR layer, to isomerize the bR retinal. The resulting photo‐response shows the protein is functional in the solid‐state junction.
Shailendra K. Saxena +5 more
wiley +1 more source
A multiport superconducting fault‐current‐limiting circuit breaker for a flexible DC power grid
IET Energy Systems Integration, 2021 The fault current of the high‐voltage and large‐capacity flexible DC power grid has the characteristics of a fast rising rate, high peak value, and large influence area; therefore, fault current suppression equipment suitable for the flexible DC power ...
Weiru Wang +4 more
doaj +1 more source
DC fault protection structures at a DC-link node in a radial multi-terminal high-voltage direct current system [PDF]
, 2016 In a multi-terminal HVDC system, DC circuit breakers (DCCBs) are conventionally connected in a star-configuration to enable isolation of a DC fault from the healthy system parts.
Fletcher, John E. +3 more
core +1 more source