Results 51 to 60 of about 3,066,783 (329)

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

Integration of a failure monitoring within a hybrid dynamic simulation environment [PDF]

, 2008
The complexity and the size of the industrial chemical processes induce the monitoring of a growing number of process variables. Their knowledge is generally based on the measurements of system variables and on the physico-chemical models of the process.
Alur, Anderson, Barton, Basseville, Chen, Chow, David, David, De Kleer, Franck, Frank, Gertler, Gilles Hétreux, Isermann, Jean Marc Le Lann, Jourda, Marie Véronique Le Lann, Mehra, Nelly Olivier-Maget, Olivier, Olivier, Perret, Shih, Shih, Sifakis, Simani, Venkatasubramanian, Watanabe, Willsky, Wöllhaf, Xiong, Zaytoon   +31 more
core   +2 more sources

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

Relativistic Theory of Infinite Statistics Fields [PDF]

, 2009
Infinite statistics in which all representations of the symmetric group can occur is known as a special case of quon theory. However, the validity of relativistic quon theories is still in doubt.
Chao Cao, Jian-Long Li, S. Weinberg, Yi-Xin Chen   +3 more
core   +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

Exploring the diffeomorphism invariant Hilbert space of a scalar field [PDF]

, 2006
As a toy model for the implementation of the diffeomorphism constraint, the interpretation of the resulting states, and the treatment of ordering ambiguities in loop quantum gravity, we consider the Hilbert space of spatially diffeomorphism invariant ...
Ashtekar A, Ashtekar A, Bojowald M, Han M, Hanno Sahlmann, Kaminski W, Kaminski W, Starodubtsev A, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Thiemann T   +12 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

Study on Dynamic Characteristics of UHVDC System under Hierarchical Infeed Mode with STATCOM

Advances in Electrical and Electronic Engineering, 2021
This paper focuses on the investigation of the dynamic characteristics of Ultra High Voltage Direct Current (UHVDC) system Under Hierarchical Infeed Mode (UHVDC-HIM) with Static Synchronous Compensator (STATCOM). The STATCOM at the inverter side of UHVDC-
Atiq Ur Rehman, Zmarrak Wali Khan, Bilawal Rehman, Sheeraz Iqbal, Mehr Gul   +4 more
doaj   +1 more source

Implementing Gauss's law in Yang-Mills theory and QCD [PDF]

, 1995
We construct a transformation that transforms perturbative states into states that implement Gauss's law for `pure gluonic' Yang-Mills theory and QCD. The fact that this transformation is not and cannot be unitary has special significance.
Fermi, Goldstone, Haller, Haller, Haller, Haller, Jackiw, James, Kurt Haller, Lusheng Chen, Mario Belloni, Rajaraman   +11 more
core   +2 more sources