Results 51 to 60 of about 306,024 (298)

Dominant instability mechanism of VSI connecting to a very weak grid [PDF]

, 2022
In this paper, it is identified that unstable weak grid connection of voltage source inverters (VSIs) is dominantly caused by the current control. In particular, it is found the proportional gain k p of conventional PI controller cannot balance the grid ...
Colas, Frederic, Li, Chuanyue, Wang, Sheng, Liang, Jun   +3 more
core   +1 more source

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source

Uncertainty quantification and weak approximation of an elliptic inverse problem [PDF]

, 2011
We consider the inverse problem of determining the permeability from the pressure in a Darcy model of flow in a porous medium. Mathematically the problem is to find the diffusion coefficient for a linear uniformly elliptic partial differential equation ...
Worthington, Claire, Robinson, Stewart, Davis, Neil D., Radnor, Zoe, Cooke, Matthew W, Burgess, Nicola, Cooke, Matthew, M. Dashti, Davies, Neil, Dashti, M., A. M. Stuart, Masoumeh Dashti (4463344), Worthington, Claire H, A M Stuart (13396491), Stuart, A. M.   +14 more
core   +1 more source

The transient instability mechanism and stability‐enhanced LVRT control for VSC riding‐through severe grid voltage sag

IET Renewable Power Generation, 2023
As the grid‐connected interface device of wind and photovoltaic power generation, the voltage source converter (VSC) must pass the low voltage ride‐through (LVRT) test. However, existing literature demonstrates that under weak grid conditions, there is a
Huiqiang Sun, Xinchun Lin, Guangzhou Huang, Jiayan Zhang, Dan Liu, Kezheng Jiang, Yong Kang   +6 more
doaj   +1 more source

Robust Control and Optimization Method for Single-Phase Grid-Connected Inverters Based on All-Pass-Filter Phase-Locked Loop in Weak Grid

Energies, 2022
In a distributed generation system, the all-pass-filter phase-locked loop (APF-PLL) is a commonly used method for grid synchronization. However, the coupling effect between APF-PLL and current control loop increases the risk of oscillation instability ...
Longyue Yang, Tian Cao, Huapeng Chen, Xinwei Dong, Shuyuan Zhang   +4 more
doaj   +1 more source

Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes

FEBS Open Bio, EarlyView.
Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard, Emma‐Jayne Proctor, Jiawa Wang, Nikolas P. Johnston, Andrew Hayes, Georgia McCorkell, Haibo Yu, Jai Tree, Mark R. Davies, Mark J. Walker, Ronald Sluyter, Stephan Brouwer, Martina L. Sanderson‐Smith   +12 more
wiley   +1 more source

Robust control of grid-connected converters under wide grid impedance variation

, 2019
This paper investigates the robust current control of grid-connected converters operating under wide grid impedance variation. Digital state feedback control gains are obtained based on linear matrix inequalities that ensure the location of the closed ...
Montagner, Vinícius F., Osório, Caio R. D., Vinicius F. Montagner, Lucas C. Borin, Caio R. D. Osorio, Gustavo G. Koch, Borin, Lucas C., Nascimento, Monique R., Oliveira, Ricardo C. L. F., Koch, Gustavo G., Monique R. Nascimento, Ricardo C. L. F. Oliveira   +11 more
core   +1 more source

Frequency Coupling Suppression Control Strategy for Single-Phase Grid-Tied Inverters in Weak Grid [PDF]

, 2022
In single-phase voltage source inverters (VSI) under a weak grid, the frequency coupling, caused by the asymmetrical system structure, poses a challenge to system modeling and controller design.
Yang, Dongsheng; id_orcid, Lin, Jianheng, Xie, Shiming, Yang, Dongsheng, Su, Mei, Sun, Yao, Zhang, Guanguan, Xiong, Wenjing   +7 more
core   +1 more source

Plasma EV Proteomics Identifies ECM Remodeling and Inflammatory Proteins LUM and C7 as Candidate Biomarkers in FSHD

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Facioscapulohumeral muscular dystrophy (FSHD) is one of the most debilitating and common muscular dystrophies. Despite its severity, no approved therapy exists for FSHD patients. However, several therapeutic candidates are currently under development, and some have recently entered clinical trials, marking the need for reliable ...
Mustafa Bilal Bayazit, Chiranth K. Nagaraj, Jackson S. Newell, Kim Truc Nguyen, Xilal Y. Rima, Jacob Doon‐Ralls, Eduardo Reátegui, Jeffrey M. Statland, Rabi Tawil, Kevin M. Flanigan, Scott Q. Harper, Nizar Y. Saad   +11 more
wiley   +1 more source

Instability of Grid Connected Converter Under Weak AC Grid Conditions

, 2019
International audienceRenewable energy sources like wind or hydrogen have been worked as a reliable option to traditional power sources. But for distributed power generation systems (DPGSs), the operation of the grid-connected converter under the weak ac
Rui Ma, Hao Bai, Gao, Fei, Zhang, Xinyue, Liu, Chen, Chen Liu, Bai, Hao, Gechter, Franck, Fei Gao, Xinyue Zhang, Franck Gechter, Ma, Rui   +11 more
core   +1 more source