Results 11 to 20 of about 368,690 (301)

Harmonic current protection scheme for voltage source converter‐based high‐voltage direct current transmission system

open access: yesIET Generation, Transmission & Distribution, 2014
Based on the inherent characteristic of the carrier‐based pulse‐width modulation converters, the response of the first carrier frequency harmonic (FCFH) current in the voltage source converter (VSC)‐based high‐voltage direct current (HVDC) transmission system is analysed under different fault conditions in this paper.
Xiaodong Zheng   +3 more
openaire   +3 more sources

A Novel Modulation Function-Based Control of Modular Multilevel Converters for High Voltage Direct Current Transmission Systems

open access: yesEnergies, 2016
In this paper, a novel modulation function-based method including analyses of the modulation index and phase is proposed for operation of modular multilevel converters (MMCs) in high voltage direct current (HVDC) transmission systems.
Majid Mehrasa   +4 more
doaj   +3 more sources

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

Control of MTDC Transmission Systems under Local Information [PDF]

open access: yes, 2014
High-voltage direct current (HVDC) is a commonly used technology for long-distance electric power transmission, mainly due to its low resistive losses.
Andreasson, Martin   +3 more
core   +2 more sources

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

Inertia emulation control strategy for VSC-HVDC transmission systems [PDF]

open access: yes, 2013
There is concern that the levels of inertia in power systems may decrease in the future, due to increased levels of energy being provided from renewable sources, which typically have little or no inertia.
Adam, Grain Philip   +4 more
core   +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

Operation and control of a current source converter series tapping of an LCC-HVDC link for integration of offshore wind power plants [PDF]

open access: yes, 2016
This work presents a series tapping station for integrating Offshore Wind Power Plants (OWPP) into a (Line Commutated Converter High Voltage Direct Current) LCC-HVDC transmission system.
Galceran Arellano, Samuel   +3 more
core   +2 more sources

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