Results 31 to 40 of about 25,508 (290)

Influence of single-phase circuit breaker tripping on inverter commutation

电力工程技术, 2022
If commutation failure does not occur when single-phase high resistance grounded in single-circuit AC line of inverter,then single-phase circuit breaker tripping may lead to commutation failure.
SONG Xinfu, MA Xing, LI Fengting, YIN Chunya, XIE Chao   +4 more
doaj   +1 more source

Research on commutation failure of Jinsu DC transmission project caused by a complex AC fault

The Journal of Engineering, 2019
Commutation failure is an important factor on safe and stable operation of the receiving-end power grid for high voltage direct current (HVDC) project. A commutation failure event in Jinsu DC transmission project caused by a complex AC failure was taken ...
Wei Peng, Liu Jian-Kun, Zhou Qian, Zhang Ning-Yu   +3 more
doaj   +1 more source

Influence of transition resistance and fault moment on DC system commutation process caused by two-phase fault of AC system

The Journal of Engineering, 2018
Commutation failure caused by the fault of AC system at inverter side seriously affects the safety and stability of high-voltage direct current (HVDC) system.
Jinzhao Song, Yongli Li, Yunke Zhang, Jingqiu Zhang   +3 more
doaj   +1 more source

Thermofield-Bosonization on Compact Space [PDF]

, 2014
We develop the construction of fermionic fields in terms of bosonic ones to describe free and interaction models in the circle, using thermofielddynamics. The description in the case of finite temperature is developed for both normal modes and zero modes.
Amaral, R. L. P. G., Belvedere, L. V.
core   +1 more source

Continuous commutation failure suppression strategy in hybrid multi-infeed HVDC transmission system

电力工程技术, 2022
For the wide application of high voltage direct current (HVDC) transmission engineering,the continuous commutation failure of line commutated converter HVDC (LCC-HVDC) has a seriously negative impact on the stable operation of the power system. Therefore,
ZHONG Mingming, XIA Chengjun, LI Shoutao, HUANG Chuyin, LI Chengxiang   +4 more
doaj   +1 more source

Quantitative Assessment for Commutation Security Based on Extinction Angle Trajectory

Journal of Modern Power Systems and Clean Energy, 2021
In order to reduce the risk of commutation failure (CF) in the AC/DC hybrid power system, the quantitative analysis on CF is required for on-line assessment and optimal control.
Qi Tao, Yusheng Xue
doaj   +1 more source

A Commutation Failure Suppression Control Method Based on the Controllable Operation Region of Hybrid Dual-Infeed HVDC System

Energies, 2018
With the increased use of high voltage direct current (HVDC) systems, line commutated converters (LCC-HVDC) and voltage source converters (VSC-HVDC) tend to feed into AC systems over short electrical distances.
Chao Xiao, Xiaofu Xiong, Jinxin Ouyang, Getu Ma, Di Zheng, Ting Tang   +5 more
doaj   +1 more source

A Dynamic Nonlinear VDCOL Control Strategy Based on the Taylor Expansion of DC Voltages for Suppressing the Subsequent Commutation Failure in HVDC Transmission

Energies, 2023
Subsequent commutation failure in high-voltage DC transmission systems seriously emphasizes the safe and stable operation of power systems. Via analyzing the mechanism of commutation failure and the principle of voltage-dependent current order limiter ...
Hongzheng Li, Kunlun Han, Shuhao Liu, Hailin Chen, Xiongfeng Zhang, Kangtai Zou   +5 more
doaj   +1 more source

General criterion for oblivious remote state preparation [PDF]

, 2006
A necessary and sufficient condition is given for general exact remote state preparation (RSP) protocols to be oblivious, that is, no information about the target state can be retrieved from the classical message.
A. Uhlmann, J. Janszky, P. Adam, Z. Kurucz   +3 more
core   +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