Results 31 to 40 of about 15,785 (223)

Minimum Frequency and Voltage Stability Constrained Unit Commitment for AC/DC Transmission Systems

open access: yesApplied Sciences, 2019
An increased use of the high-voltage direct current (HVDC) technologies can have important effects on frequency performance and voltage stability of the receiving-end grid during normal operation as well as during blocking failure.
Ningyu Zhang, Qian Zhou, Haoming Hu
doaj   +1 more source

Modeling of HVDC System to Improve Estimation of Transient DC Current and Voltages for AC Line-to-Ground FaultAn Actual Case Study in Korea [PDF]

open access: yes, 2019
A new modeling method for high voltage direct current (HVDC) systems and associated controllers is presented for the power system simulator for engineering (PSS/E) simulation environment.
Kim, Chanki   +3 more
core   +1 more source

High-Voltage Direct Current (HVDC) Transmission: Reliability and applications

open access: yesWorld Journal of Advanced Research and Reviews, 2022
High-Voltage Direct Current (HVDC) transmission has emerged as a transformative technology for long-distance and high-power electrical transmission, addressing the limitations of conventional Alternating Current (AC) transmission systems. HVDC technology is characterized by reduced transmission losses, improved grid stability, and enhanced capability ...
openaire   +1 more source

Comparative study of AC and positive and negative DC visual corona for sphere-plane gaps in atmospheric air [PDF]

open access: yes, 2018
Due to the expansion of high-voltage direct current (HVDC) power systems, manufacturers of high-voltage (HV) hardware for alternating current (ac) applications are focusing their efforts towards the HVDC market. Because of the historical preponderance of
Capelli, Francesca   +2 more
core   +2 more sources

Accurate optical fiber current transducer for high-voltage direct current (HVDC) transmission

open access: yesInstrumentation Science & Technology, 2022
Accurate optical fiber current transducer based on the Faraday magneto-optical effect is described for high voltage direct current (HVDC) transmission. The transducer may be used to measure DC and high-order harmonic currents in a ± 800 kV DC transmission field.
Liu, Haifeng   +5 more
openaire   +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

Research on DC Protection Strategy in Multi-Terminal Hybrid HVDC System

open access: yesEngineering, 2021
Multi-terminal hybrid high-voltage direct current (HVDC) systems have been developed quickly in recent years in power transmission area. However, for voltage-source converter (VSC) stations in hybrid HVDC systems, no direct current (DC) filters are ...
Yuping Zheng   +5 more
doaj   +1 more source

Advanced Control Strategies of VSC Based HVDC Transmission System: Issues and Potential Recommendations

open access: yesIEEE Access, 2018
The converters and their control strategies play an important role in converting, transmitting, and improving the performance of high-voltage direct current (HVDC) system. There are different types of converter and their control strategies being employed
M. A. Hannan   +8 more
doaj   +1 more source

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  

Partial discharge behavior under operational and anomalous conditions in HVDC systems [PDF]

open access: yes, 2017
Power cables undergo various types of overstressing conditions during their operation that influence the integrity of their insulation systems. This causes accelerated ageing and might lead to their premature failure in severe cases.
Azizian Fard, M.   +3 more
core   +3 more sources

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