Results 41 to 50 of about 787,692 (200)

A dc to dc converter [PDF]

open access: yes, 1984
The object of the invention is to provide an improved converter for converting one direct current voltage to another. A plurality of phased square wave voltages are provided from a ring counter through amplifiers to a like plurality of output ...
Garrett, H.   +3 more
core   +1 more source

A Review on Multi-Terminal High Voltage Direct Current Networks for Wind Power Integration

open access: yesEnergies, 2022
With the growing pressure to substitute fossil fuel-based generation, Renewable Energy Sources (RES) have become one of the main solutions from the power sector in the fight against climate change.
Luís F. Normandia Lourenço   +7 more
doaj   +1 more source

Pulsed high-voltage dc RF sputtering [PDF]

open access: yes, 1969
Sputtering technique uses pulsed high voltage direct current to the object to be plated and a radio frequency sputtered film source.
Przybyszewski, J. S., Jr.   +1 more
core   +1 more source

Vulnerability assessment of high-voltage direct current transmission systems to cyberattacks

open access: yesSecurity and Safety
High-voltage direct current (HVDC) transmission systems demonstrate significant advantages in long-distance and high-capacity power transmission. Voltage-source converter-based HVDC (VSC-HVDC), with its flexible power flow control and independent active ...
Guo Rong, Liu Mengxiang, Deng Ruilong
doaj   +1 more source

Piezoelectric transformer-based high conversion ratio interface for driving dielectric actuator in microrobotic applications

open access: yesInternational Journal of Advanced Robotic Systems, 2016
Dielectric actuators are utilized to convert electrical power into mechanical strain with considerable potential in microrobotic applications. However, critical challenges that need to be addressed include high-voltage interface with high conversion ...
Chen Chen   +4 more
doaj   +1 more source

Load insensitive electrical device [PDF]

open access: yes, 1974
A class of power converters is described for supplying direct current at one voltage from a source at another voltage. It includes a simple passive circuit arrangement of solid-state switches, inductors, and capacitors by which the output voltage of the ...
Schwarz, F. C.
core   +1 more source

Research on High Voltage Direct Current Power Supply System for Telecommunications

open access: yesDianxin kexue, 2013
The analysis was made for the nominal voltage selection and system design method which was based on energy efficiency prompt and power reliability increasing,these different goals to replace AC power system by DC power system,and these two direct current
Li Lu   +3 more
doaj   +2 more sources

R&D and application of voltage sourced converter based high voltage direct current engineering technology in China

open access: yesJournal of Modern Power Systems and Clean Energy, 2014
As a new generation of direct current (DC) transmission technology, voltage sourced converter (VSC) based high voltage direct current (HVDC) has been widely developed and applied all over the world.
Guangfu Tang, Zhiyuan He, Hui Pang
doaj   +1 more source

Comparative analysis of high voltage alternating current & high voltage direct current offshore collection grid systems [PDF]

open access: yes, 2021
An increase in industries as well as the world’s population, is causing a strain on the electricity supply. This coupled with the fact that fossil fuel supplies are decreasing, is leading the world to new, greener methods of electrical energy generation.
openaire   +2 more sources

Analysis of harmonics in subsea power transmission cables used in VSC-HVDC transmission systems operating under steady-state conditions [PDF]

open access: yes, 2007
Subsea power cables are a critical component of a voltage-source converter-high-voltage direct current (VSC-HVDC) transmission system in any offshore electrical power scheme.
Bucknall, R.W.G., Chien, C.H.
core  

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