Results 91 to 100 of about 2,596,360 (213)

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

A Novel Ensemble Fault Diagnosis Model for Main Circulation Pumps of Converter Valves in VSC-HVDC Transmission Systems. [PDF]

open access: yesSensors (Basel), 2023
Zhou S   +9 more
europepmc   +1 more source

Vulnerability assessment of high-voltage direct current transmission systems to cyberattacks

open access: yesSecurity and Safety
High-voltage direct current (HVDC) transmission systems demonstrate significant advantages in long-distance and high-capacity power transmission. Voltage-source converter-based HVDC (VSC-HVDC), with its flexible power flow control and independent active ...
Guo Rong, Liu Mengxiang, Deng Ruilong
doaj   +1 more source

New two chamber transfer switch for 6500 A commutation current

open access: yesGlobal Energy Interconnection, 2018
HVDC transfer switches are used in different locations in electrode lines of HVDC transmission systems for their reconfigurations. They have to carry and commutate currents to the overload currents of HVDC transmission systems, which increased to 6,400A ...
Lutz-Rüdiger Jänicke   +4 more
doaj   +1 more source

Impedance modeling and stability analysis of a three-phase three-level NPC inverter connected to the grid

open access: yesCSEE Journal of Power and Energy Systems, 2020
Bo Zhang   +4 more
doaj   +1 more source

Coordinated Strategy to Improve Post-Fault Characteristics of Hybrid Multi-Infeed HVDC Transmission System

open access: yesEnergies
The characteristics of the dynamic reactive power demand of a hybrid multi-infeed HVDC transmission system during the post-fault recovery period are analyzed and a coordinated control strategy to improve the fault recovery characteristics of the hybrid ...
Bingjie Jin   +7 more
doaj   +1 more source

Hybrid Converters for HVDC Transmission

open access: yes, 2019
The line-commutated converter (LCC) and the voltage-source converter (VSC) are the two main converter technologies utilized in high-voltage direct current (HVDC) transmission applications. Depending on the application requirements, one technology might be more advantageous than the other.
openaire   +1 more source

Short-term Optimal Scheduling Model for Hydropower Stations Considering Peak Shaving of Local and HVDC Receiving Power Grids

open access: yesRenmin Zhujiang
In the face of the increasingly severe peak shaving pressure on both sending and receiving power grids of the high voltage direct current (HVDC) of large-scale hydropower stations,a short-term optimal scheduling model that takes into account peak shaving
ZHOU Binbin   +5 more
doaj  

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