Results 11 to 20 of about 2,111,098 (215)

An Improved Commutation Prediction Algorithm to Mitigate Commutation Failure in High Voltage Direct Current [PDF]

Energies, 2017
Commutation failure is a common fault for line-commutated converters in the inverter. To reduce the possibility of commutation failure, many prediction algorithms based on alternating current (AC) voltage detection have already been implemented in high voltage direct current (HVDC) control and protection systems.
Li, Xinnian, Li, Fengqi, Chen, Shuyong, Li, Yanan, Zou, Qiang, Wu, Ziping, Lin, Shaobo   +6 more
openaire   +3 more sources

Strategy for Suppressing Commutation Failures in High-Voltage Direct Current Inverter Station Based on Transient Overvoltage

Energies
Commutation failures in high-voltage direct current (HVDC) transmission systems often occur within inverter stations, posing challenges to the safe and consistent operation of HVDC transmission projects.
Dandan Zhao, Shaoyin He, Hua Huang, Zheng Han, Lv Cui, Yuxin Li   +5 more
doaj   +2 more sources

Improved Commutation Failure Prevention Control for Inter-Phase Short-Circuit Faults

Applied Sciences
To enhance the resistance to commutation failures of high-voltage direct current (HVDC) transmission systems under interphase short-circuit faults, an improved commutation failure prevention (CFPREV) control strategy is developed and validated. Initially,
Lei Liu, Xiaopeng Li, Yufei Teng, Yiping Luo, Keao Chen   +4 more
doaj   +2 more sources

Heisenberg-Lie commutation relations in Banach algebras. [PDF]

, 2009
Given q1, q2 ∈ ℂ { 0 }, we construct a unital Banach algebra Bq1, q2 that contains a universal normalised solution to the (q1, q2)-deformed Heisenberg-Lie commutation relations in the following specific ...
Laustsen, Niels Jakob, Silvestrov, Sergei D.   +1 more
core   +4 more sources

Analysis and prevention of commutation failure caused by HVDC rectifier AC faults

IET Generation, Transmission & Distribution, 2022
Earlier works have reported that rectifier AC faults also can cause commutation failure during fault‐off recovery process. Whereas the occurrence of CF is merely ascribed to inverter AC faults in conventional wisdom.
Sheng Lin, Yuqing Lei, Jian Liu, Lei Liu
doaj   +1 more source

Variable Extinction Angle Control Strategy Based on Virtual Resistance to Mitigate Commutation Failures in HVDC System

IEEE Access, 2020
To mitigate commutation failures (CFs) and minimize the instability of HVDC systems due to AC faults or control mode ambiguity, a constant extinction voltage-time area based control strategy with virtual resistance is proposed.
Zhanhong Wei, Wanliang Fang, Jun Liu
doaj   +1 more source

An Introspective Review on Commutation Failure Inhibition Strategies in LCC-HVDC Transmission Networks

, 2022
Line-Commutated Converter High Voltage Direct Current (LCC-HVDC) technology plays an irreplaceable role in power transmission systems due to its thyristor's superior power handling capability and low operating power losses.
Jinghan He (6458033), Kashem M Muttaqi (13589731), Sohrab Mirsaeidi (20257917), Dimitrios Tzelepis (20259048), Dalila Mat Said (12413386), Alice Giramata (20259045)   +5 more
core   +3 more sources

An Evaluation Method for Commutation Failure Caused by Waveform Distortion

, 2021
Commutation failure is a key issue that affects the safe operation of HVDC transmission systems. Scholars at home and abroad have conducted research on the mechanism, evaluation indicators, and control strategies of commutation failure.
Hao Zhou, Can Su
core   +1 more source

A DC Chopper Topology to Mitigate Commutation Failure of Line Commutated Converter Based High Voltage Direct Current Transmission [PDF]

Journal of Modern Power Systems and Clean Energy, 2020
To reduce the probability of commutation failure (CF) of a line commutated converter based high-voltage direct current (LCC-HVDC) transmission, a DC chopper topology composed of power consumption sub-modules based on thyristor full-bridge module (TFB-PCSM) is proposed.
Chunyi Guo, Bo Liu, Chengyong Zhao
openaire   +2 more sources

Research on the characteristics of multi-infeed DC system with hybrid commutation converter suppressing successive commutation failure

International Journal of Electrical Power & Energy Systems
In view of the problem of successive commutation failure in multi-infeed direct current systems, this paper investigates the commutation characteristics of hybrid commutation convert technology and its application in mitigating successive commutation ...
Jian Cui, Zhichang Yuan, Kangsheng Cui, Long Zhang, Pengbo Zhao, Zhanqing Yu, Xiaoguang Wei, Xuejiao Han   +7 more
doaj   +1 more source