Results 11 to 20 of about 89,376 (259)

Calculating the Interface Flow Limits for the Expanded Use of High-Voltage Direct Current in Power Systems

open access: yesEnergies, 2020
Although loads are increasingly becoming concentrated in metropolitan areas, power generation has decreased in metropolitan areas and increased in nonmetropolitan areas; hence, power transmission must occur through interface lines.
Sangwook Han
doaj   +1 more source

Novel pilot protection scheme for line‐commutated converter high voltage direct current transmission lines based on behaviour of characteristic harmonic impedances

open access: yesIET Generation, Transmission & Distribution, 2021
Transient behaviour of high‐voltage direct current transmission lines under direct current faults can be easily affected by many factors, namely, fault location, fault resistance and transmission line length.
Farzad Dehghan Marvasti   +2 more
doaj   +1 more source

Novel Enhanced Modular Multilevel Converter for High-Voltage Direct Current Transmission Systems

open access: yesEnergies, 2020
This paper proposes an enhanced modular multilevel converter as an alternative to the conventional half-bridge modular multilevel converter that employs a reduced number of medium-voltage cells, with the aim of improving waveforms quality in its AC and ...
Dimitrios Vozikis   +3 more
doaj   +1 more source

Corrosion Behavior of Aluminum in Dilute Acetic Acid Solution Simulating Cooling Water in HVDC Transmission

open access: yesInternational Journal of Electrochemical Science, 2022
The concentration, temperature effect and thermodynamic activation energy of aluminum corrosion in dilute acetic acid solution were explored by the polarization curve and the electrochemical impedance spectroscopy.
Peng Zhang   +6 more
doaj   +1 more source

Hybrid Models of Alternative Current Filter for Hvdc

open access: yesMATEC Web of Conferences, 2017
Based on a hybrid simulation concept of HVDC, the developed hybrid AC filter models, providing the sufficiently full and adequate modeling of all single continuous spectrum of quasi-steady-state and transient processes in the filter, are presented.
Ufa Ruslan A.   +3 more
doaj   +1 more source

WSN-Based Measurement of Ion-Current Density Under High-Voltage Direct Current Transmission Lines

open access: yesIEEE Access, 2019
Ion-current density is a significant indicator of electromagnetic environment under high voltage direct current lines. To improve measurement accuracy and convenience, this paper concluded factors that affect measurement results and a wireless ...
Yong Cui   +5 more
doaj   +1 more source

Stability Improvement of The Iraqi Super Grid (400kV) using High Voltage Direct Current (HVDC) Transmission

open access: yesJournal of Engineering, 2021
This research analyzes the level of the short circuit effect of the Iraqi super network and decides the suitable location for the High Voltage Direct Current (HVDC) connections in order to obtain the best short circuit reduction of the total currents of ...
Zainab Nadhim Abbas   +1 more
doaj   +1 more source

Reliability evaluation and thermal design of medium-voltage converter for underwater long-distance high-voltage direct current transmission system

open access: yesThe Journal of Engineering, 2019
Underwater long-distance high-voltage direct current transmission system can provide long-term, reliable, and sustainable energy for ocean observatories system which has higher reliability requirement than onshore or conventional underwater equipment. As
Siyuan Ma   +10 more
doaj   +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

A Impact of High Voltage Direct Current Link on Transmission Line in Kurdistan Power System

open access: yesJournal of Engineering, 2022
Kurdistan power system is expanded along years ago. The electrical power is transmitted through long transmission lines. The main problem of transmission lines is active and reactive power losses. It is important to solve this issue, unless, the most of
Truska K. Mohammed Salih   +2 more
doaj   +1 more source

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