Results 21 to 30 of about 4,139,382 (260)

Reliability evaluation of MMC system considering working conditions

The Journal of Engineering, 2018
The reliability is a key issue of the high-voltage high-power modular multilevel converter (MMC) system due to the usage of fragile insulated gate bipolar transistor (IGBT) modules. In this study, it is proposed that the reliability of the MMC system can
Tao Zheng, Meng Huang, Lingyi Zhu, Xiaoming Zha   +3 more
doaj   +1 more source

Enteropathogenic E. coli shows delayed attachment and host response in human jejunum organoid‐derived monolayers compared to HeLa cells

FEBS Letters, EarlyView.
Enteropathogenic E. coli (EPEC) infects the human intestinal epithelium, resulting in severe illness and diarrhoea. In this study, we compared the infection of cancer‐derived cell lines with human organoid‐derived models of the small intestine. We observed a delayed in attachment, inflammation and cell death on primary cells, indicating that host ...
Mastura Neyazi, Pilar Samperio Ventayol, Natalie Burkard, Nicolas Schlegel, Carmen Aguilar, Sina Bartfeld   +5 more
wiley   +1 more source

A VSC transmission system using flying capacitor multilevel converters and selective harmonic elimination pWM control [PDF]

, 2005
A transmission system based on voltage-source three-level flying capacitor (FC) multilevel converters with selective harmonic elimination pulse-width modulation (SHE-PWM) control is presented in this paper.
Lie Xu, Agelidis, V.G., V.G. Agelidis, Xu, L.   +3 more
core   +1 more source

An auto-reclosing scheme for DC circuit breaker in VSC-HVDC transmission system

The Journal of Engineering, 2019
When a DC line fault happens, the converter will be blocked instantly. This leads to an interruption of power transmission and influences the stability of DC and AC systems.
Yuan Wang, Yuhong Wang, Chengzhuo Liu, Liwen Yang   +3 more
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Optimal control set expansion method for three‐phase voltage source converter with slip window selection and online parameter modification

IET Power Electronics
Finite control set model predictive control (FCS‐MPC) has been widely used in the control of three‐phase voltage source converter (VSC), but its control performance declines sharply at low sampling frequencies.
Linqiang Hu, Wanjun Lei, Zhongxiu Xiao, Xing Sun   +3 more
doaj   +1 more source

Analysis of DC voltage oscillation mechanism in AC/DC hybrid distribution system

The Journal of Engineering, 2019
DC voltage oscillation occurs more and more frequently in voltage source converter (VSC)-based AC/DC hybrid distribution system (AC/DC HDS). However, currently, the explanation of the oscillation mechanism is not clear enough.
Luyang Li, Wei Pei, Hao Xiao, Wei Deng, Li Kong   +4 more
doaj   +1 more source

Hyperosmotic stress induces PARP1‐mediated HPF1‐dependent mono(ADP‐ribosyl)ation

FEBS Letters, EarlyView.
Sorbitol‐induced hyperosmotic stress rapidly induces reversible mono(ADP‐ribosyl)ation (MARylation) on PARP1 without the signs of genotoxic signaling. We show that PARP1 autoMARylation is HPF1 dependent and forms hydroxylamine‐resistant O‐glycosidic linkages.
Anna Georgina Kopasz, Mihály Mérey, Rebeka Vásárhelyi, Ramóna Pék, Victor Imburchia, László Henn, Adrián Kószó, Nicholas D. Lakin, Ivan Ahel, Sébastien Huet, Ágnes Czibula, Gyula Timinszky   +11 more
wiley   +1 more source

Tuning harmonic absorption of voltage source converters

, 2010
This paper develops a tool for controlling the harmonic absorption of hysteretic controlled voltage source converters that are connected to a power system. Each VSC is controlled by a state feedback control input to a hysteretic comparator.
Zare, F, Ghosh, Arindam, Firuz Zare, Gerard Ledwich, Arindam Ghosh, Ledwich, Gerard, zare, F., Ledwich, G.   +7 more
core   +1 more source

A Generalised Power Synchronisation Loop Design for Performance Enhancement of Grid‐Forming Converter

IET Smart Grid
The dynamic characteristics of a grid‐forming converter (GFM) directly affect the stable operation of converter‐based power systems, where the power synchronisation loop plays a critical role in the shaping of the dynamic characteristics of the GFM ...
Yifeng Li, Wei Pei, Jiawang Xiong, Wei Deng   +3 more
doaj   +1 more source