Results 31 to 40 of about 5,008 (230)

Overview and Assessment of HVDC Current Applications and Future Trends

open access: yesEnergies, 2022
High voltage direct current (HVDC) technology has begun to gather a high degree of interest in the last few decades, showing a fast evolution of achievable voltage levels, transfer capacities, and transmission lengths.
Andrei Stan   +2 more
doaj   +1 more source

Engineering practices for the integration of large-scale renewable energy VSC-HVDC systems

open access: yesGlobal Energy Interconnection, 2020
With the continuous development of power electronic devices, intelligent control systems, and other technologies, the voltage level and transmission capacity of voltage source converter (VSC)-high-voltage direct current (HVDC) technology will continue to
Yan Li   +3 more
doaj   +1 more source

An Overview on VSC-HVDC Power Transmission Systems

open access: yesInternational Journal of Control and Automation, 2016
The Voltage Source Converter based High Voltage Direct Current(VSC-HVDC) is a new generation HVDC technology. Because of the technology of the PWM and the turn- on and turn-off electronic apparatus, VSC-HVDC could make up for the defective of the traditional HVDC. And the development is rapid.
Zhenying Pei   +3 more
openaire   +1 more source

HVDC power transmission electrode siting and design [PDF]

open access: yes, 1997
This research strives to shed light on the feasibility and practicality of using deep earth electrodes to permit their use for extended periods without adverse consequences. This report begins with a review of the fundamentals associated with current conduction in earth, including the various techniques available for measuring the earth`s electrical ...
Holt, R.J., Dabkowski, J., Hauth, R.L.
openaire   +2 more sources

Recent advances in High-Voltage direct-current power transmission systems

open access: yes, 2006
The ever increasing progress of high-voltage high-power fully-controlled semiconductor technology continues to have a significant impact on the development of advanced power electronic apparatus used to support optimised operations and efficient ...
Nikolas Flourentzou   +5 more
core   +1 more source

Evaluation, Analysis and Diagnosis for HVDC Transmission System Faults via Knowledge Graph under New Energy Systems Construction: A Critical Review

open access: yesEnergies, 2022
High voltage direct current (HVDC) transmission systems play a critical role to optimize resource allocation and stabilize power grid operation in the current power grid thanks to their asynchronous networking and large transmission capacity.
Jiyang Wu   +6 more
doaj   +1 more source

Inertia emulation control strategy for VSC-HVDC transmission systems

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.
Roscoe, Andrew   +4 more
core   +1 more source

HVDC-System-Interaction Assessment through Line-Flow Change-Distribution Factor and Transient-Stability Analysis at Planning Stage

open access: yesEnergies, 2016
Many of the recent projects for new transmission line have considered the high-voltage direct current (HVDC) system, owing to the many advantages of the direct current (DC) system.
Sungchul Hwang, Jaegul Lee, Gilsoo Jang
doaj   +1 more source

Classification and spatial mapping of atmospheric corrosion of China

open access: yesnpj Materials Degradation, 2022
Atmospheric corrosion is ubiquitous in China but varies a lot among different regions covering the cold, temperate, and tropical zones. Categorizing the atmospheric corrosivity and plotting precise atmospheric corrosion map remain key interest for a ...
Wenkui Hao   +10 more
doaj   +1 more source

A Review of Overcurrent Protection in Smart Grids Under Cyber‐Physical Threats With a Cyber‐Physical Evaluation Framework

open access: yesEnergy Science &Engineering, EarlyView.
By manipulating current and voltage measurements, an assailant can induce unwanted relay action while attempting to avoid detection. Detecting advanced cyber intrusions in power protection environments requires specialised data analysis and anomaly detection methods.
Feras Alasali   +6 more
wiley   +1 more source

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