Results 21 to 30 of about 45,198 (267)
Frontiers in ElectronicsThis paper addresses the critical need to determine the stable operating limit of modular multilevel converter-based high voltage direct current (MMC-HVDC) systems, particularly concerning the integration of extensive renewable energy sources. To achieve
Maolan Peng +3 more
doaj +1 more source
Frequency Dynamic Characteristic Analysis of Ultra-Low Frequency Oscillation and Multi-Machine GPSS Parameter Tuning Method [PDF]
Dianli jianshe[Objective] The growing concern over frequency stability is attributed to the decreasing overall inertia of power systems. To improve the analysis of frequency stability and performance of modern power systems， a frequency dynamic characteristic analysis
ZENG Pijiang, XU Hao, YE Pengju, ZHENG Chao, SAI Xiangyu, CHEN Gang, ZHAO Yong, JIANG Chuyang, GAN Deqiang
doaj +1 more source
A Comprehensive Loss Model and Comparison of AC and DC Boost Converters
Energies, 2021 DC microgrids have become a prevalent topic in research in part due to the expected superior efficiency of DC/DC converters compared to their AC/DC counterparts.
Daniel L. Gerber +6 more
doaj +1 more source
Simulation and analysis of UHV half wavelength and DC hybrid transmission system
Global Energy Interconnection, 2018 The scenarios of a half wavelength transmission line (HWTL) connected to the original DC asynchronous interconnection system are established based on the quasi-steady state model of HWTL, which include single or double loops of single channel and multi ...
Qianyu Zhao +4 more
doaj +1 more source
Stability enhancement of power system by simultaneous ac-dc power transmission
IEICE Electronics Express, 2009 Generators may supply power to infinite bus through a single circuit long ac transmission line. The system becomes unstable after the clearance of a fault if the pre fault power transfer or the fault clearance time is high. Conversion of the line for simultaneous ac-dc power flow may keep the system stable with high values of pre fault power and fault ...
Basu, K. P., H., Naeem M.
openaire +2 more sources
Application aspects of multiterminal DC power transmission [PDF]
IEEE Transactions on Power Delivery, 1990 Four practical multiterminal DC systems are described. Two are already in commercial operation: Nelson River (double-bipole four-terminal), and Sardinia-Corsica-Italy (two-terminal monopolar tapped to become three-terminal). Two others are expansions of existing systems and are under construction: Pacific HVDC (high-voltage DC) Intertie (bipolar four ...
W.F. Long +6 more
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Heterotropic regulation and negative homotropic cooperativity
FEBS Open Bio, EarlyView.We identified a structural module common to some proteins that couple negative cooperativity with heterotropic regulation, two features that rarely coexist. These proteins are ring‐like and present an ordered asymmetry whereby noncontacting subunits are symmetric, and their tertiary structure differs from that of contacting subunits.
Veronica Morea +5 more
wiley +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Considerable efforts have been dedicated to developing effective treatments for post‐stroke executive impairment (PSEI), among which repetitive transcranial magnetic stimulation (rTMS) has shown great potential. This study aimed to investigate the therapeutic effects of high‐frequency rTMS on working memory (WM) and response ...
Mengting Lao +6 more
wiley +1 more source
Power Upgrading of Transmission Line by Combining AC-DC Transmission and Analysis of UPFC [PDF]
International Journal of Trend in Scientific Research and Development, 2019 The basic concept in designing of any power lines in transmission of ac dc power with power upgrading using UPFC is proposed through a single circuit ac transmission line. In this proposal certain limitation are their due to the use of ground as return path.
Sandeep Sonwane, Pratik Ghutke
openaire +2 more sources
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Neurochemical levels measured by brain MR spectroscopy (MRS) have been proposed as endpoints for clinical trials in early‐stage spinocerebellar ataxia (SCA) trials. We tested their trial‐readiness by quantifying neurochemicals in three affected brain regions in early‐stage cohorts of SCA2 and SCA3, examining their reproducibility in ...
James M. Joers +19 more
wiley +1 more source