Results 21 to 30 of about 23,110 (309)

Comparative high voltage impulse measurement

Journal of Research of the National Institute of Standards and Technology, 1996
A facility has been developed for the determination of the ratio of pulse high voltage dividers over the range from 10 kV to 300 kV using comparative techniques with Kerr electro-optic voltage measurement systems and reference resistive voltage dividers. Pulse voltage ratios of test dividers can be determined with relative expanded uncertainties of 0.4
FitzPatrick, Gerald J., Kelley, Edward F.   +1 more
openaire   +2 more sources

The analytical method for determining the parameters of impulse overvoltages from atmospheric discharges [PDF]

Bakar
Impulse generators with RC circuits form the foundation for producing surge voltages used in high-voltage equipment testing. In high-voltage engineering literature, the expressions for impulse voltage waveforms include known parameters of lightning or ...
Marković Nenad, Bjelić Slobodan, Marković Strahinja   +2 more
doaj   +1 more source

Coherence and time-frequency analysis of impulse voltage and current measurements

Journal of Energy in Southern Africa, 2017
The aim of this paper is to point out the advantages of the use of the time-frequency analysis in the digital processing of waveforms recorded in high voltage impulse tests.
Jelena Dikun, Emel Onal
doaj   +1 more source

Mitigation of Lightning Overvoltages Using STATCOM in Grid-Connected PV Systems [PDF]

Port Said Engineering Research Journal, 2020
Lightning strike causes a large lightning voltage injection into grid-connected PV systems at the point between inverter and transformer. The overvoltage resulting from the lightning-impulse voltage is a major concern for the multiple expensive ...
ibrahim hamdeen, Ebrahim Badran, Mohammed Saeed   +2 more
doaj   +1 more source

Leader Propagation Characteristics Under Positive Lightning Impulse Voltages

IEEE Access
Lightning strikes on transmission lines often generate overvoltage, which is the primary reason for insulator string flashover. This overvoltage, with a rapid rise time of just a few microseconds, causes leader propagation characteristics to differ ...
Lei Jia, Song Zhang, Lu Qu, Yongxiang Cai, Huaifei Chen, Xiaobing Xiao, Ruihan Qi, Minchuan Liao, Jian Hu   +8 more
doaj   +1 more source

Comparative Evaluation of Hemodiafiltration, Hemoperfusion, and Standard Hemodialysis on Efficacy, Inflammatory Control, Dialysis Adequacy, and Safety in End‐Stage Renal Disease: A Prospective Observational Study

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Chronic micro‐inflammation in patients with end‐stage renal disease (ESRD) is a significant driver of cardiovascular complications and diminished quality of life. While standard hemodialysis (SHD) effectively manages small‐molecule clearance, its ability to remove medium‐to‐large uremic toxins—the primary catalysts of systemic ...
Hongwei Zuo, Weisi Dai, Jie Mao, Mei Ye, Xingshan Lu, Xiaocui Zhang   +5 more
wiley   +1 more source

Organoids in pediatric cancer research

FEBS Letters, EarlyView.
Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley   +1 more source

Electric Field Distribution Characteristics and Space Charge Motion Process in Transformer Oil Under Impulse Voltage

IEEE Access, 2019
The electric field and space charge dynamics characteristics in oil under impulse voltage are key factors to the transformer insulation design, which are mainly obtained through simulation, falling short of experimental verifications.
Bo Qi, Chunjia Gao, Hao Han, Xiaolin Zhao, Qing Yuan, Shuqi Zhang, Chengrong Li   +6 more
doaj   +1 more source

Extended Use for the Frequency Response Analysis: Switching Impulse Voltage Based Preliminary Diagnosis of Potential Sources of Partial Discharges in Transformer

Applied Sciences, 2020
The Frequency Response Analysis approach (FRA) is useful in the fault diagnosis of transformers. However, its usefulness in diagnosing any potential sources of Partial Discharge (PD) in transformers has not been thoroughly investigated so far.
Kamalaselvan Arunachalam, Balasubramanian Madanmohan, Rajesh Rajamani, Natarajan Prabaharan, Hassan Haes Alhelou, Pierluigi Siano   +5 more
doaj   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source