Results 21 to 30 of about 787,692 (200)

An Overview of HVDC Technology

open access: yesEnergies, 2020
There is a growing use of High Voltage Direct Current (HVDC) globally due to the many advantages of Direct Current (DC) transmission systems over Alternating Current (AC) transmission, including enabling transmission over long distances, higher ...
Neville R. Watson, Jeremy D. Watson
doaj   +1 more source

Xenon excimer emission from pulsed high-pressure capillary microdischarges [PDF]

open access: yes, 2007
Intense xenon vacuum ultraviolet (VUV) emission is observed from a high-pressure capillary cathode microdischarge in direct current operation, by superimposing a high-voltage pulse of 50 ns duration.
Frank, Klaus   +4 more
core   +1 more source

High Voltage Direct Current Transmission (HVDC)

open access: yesRevista de Operaciones Tecnologicas, 2023
High Voltage Direct Current (HVDC) transmission links are currently in operation throughout the world. Until a few years ago, what has limited the use of this way of transmitting power has generally been its cost, but with the advances in power electronics in reducing costs in thyristors: higher rated voltage and current, and simplification of the ...
openaire   +1 more source

Design of ± 535 kV hybrid high voltage direct current (HVDC) circuit breaker

open access: yesIET Generation, Transmission & Distribution, 2022
This paper proposes a ± 535 kV hybrid high voltage direct current (HVDC) circuit breaker. In this paper, the interruption processes of the main branch, transferring branch, and MOV (metal oxide varistors) branch are studied by PSCAD/EMTDC computer ...
Chenyang Liu   +4 more
doaj   +1 more source

Overview of Various Voltage Control Technologies for Wind Turbines and AC/DC Connection Systems

open access: yesEnergies, 2023
Wind power generation is one of the mainstream renewable energy resources. Voltage stability is as important as the frequency stability of a power system with a high penetration of wind power generation.
Yuan-Kang Wu   +2 more
doaj   +1 more source

Space Charge Accumulation under Effects of Temperature Gradient and Applied Voltage Reversal on Solid Dielectric DC Cable [PDF]

open access: yes, 2009
A well-known fact of the existence and accumulation of space charge within the insulating material poses threat to the reliability in the operation of dc power cables.
Chen, George   +2 more
core   +1 more source

Research on Thyristor Reverse Recovery Behavior in High-Voltage Direct Current Transmission Converter Valves and Its Application in Integrated Protection Systems

open access: yesEnergies
The performance of converter valves is essential for the reliability and efficiency of high-voltage direct current (HVDC) transmission systems. Converter valves consist of multiple thyristor levels, each requiring regular testing to ensure proper ...
Cao Wen   +7 more
doaj   +1 more source

The Interest of the Wind Farm of Adrar to the Southwest Network of Algeria [PDF]

open access: yesIranica Journal of Energy and Environment, 2019
The interest in renewable energy has been increasing over the last few years, especially after global awareness regarding the hazardous effect of fossil fuel burning.
G. Hocine   +3 more
doaj   +1 more source

Distributed Voltage and Current Control of Multi-Terminal High-Voltage Direct Current Transmission Systems

open access: yes, 2014
High-voltage direct current (HVDC) is a commonly used technology for long-distance power transmission, due to its low resistive losses and low costs. In this paper, a novel distributed controller for multi-terminal HVDC (MTDC) systems is proposed.
Andreasson, Martin   +5 more
core   +1 more source

S-Transform Based Traveling Wave Directional Pilot Protection for Hybrid LCC-MMC-HVDC Transmission Line

open access: yesEnergies, 2022
In this paper, the traveling wave protection issue of a hybrid high-voltage direct-current transmission line based on the line-commutated converter and modular multilevel converter is investigated.
Wei Zhang, Dong Wang
doaj   +1 more source

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