Results 31 to 40 of about 351,030 (147)

A High-Precision Error Calibration Technique for Current Transformers under the Influence of DC Bias

Energies, 2023
A bias current in the power system will cause saturation of the measuring current transformer (CT), leading to an increase in measurement error. Therefore, in this paper, we first conducted measurements of the direct current component in a 10 kV ...
Sanlei Dang, Yong Xiao, Baoshuai Wang, Dingqu Zhang, Bo Zhang, Shanshan Hu, Hongtian Song, Chi Xu, Yiqin Cai   +8 more
doaj   +1 more source

Real-time phase-selective data acquisition system for measurement of wave phenomena in pulsed plasma discharges [PDF]

, 1998
A novel data acquisition system and methodology have been developed for the study of wave phenomena in pulsed plasma discharges. The method effectively reduces experimental uncertainty due to shot-to-shot fluctuations in high repetition rate experiments.
Bellan, P. M., Sanders, S. J., Stern, R. A.   +2 more
core   +1 more source

A Time-Domain Pilot Protection for AC Transmission Lines Connecting BESSs Based on Sequence Matching Index

Elektronika ir Elektrotechnika
Battery energy storage station (BESS) possesses flexible operating states and complex fault characteristics. With the continuous increase in its installed capacity and number, the risk of maloperation of traditional relay protection significantly ...
Ping Xiong, Xiaoqian Zhu, Xing Wang, Lie Li, Yifan Zhao, Xiaoyang Yang   +5 more
doaj   +1 more source

Longitudinal assessment of chest computerized tomography and oxygen saturation for patients with COVID-19

The Egyptian Journal of Radiology and Nuclear Medicine, 2020
Background COVID-19 is a pandemic disease and is important to know the nature of the disease during follow-up. We aimed to study different imaging signs and changes that occurred during the initial scan, follow-up, and complications.
Ahmed M. Osman, Suzan Farouk, Nehad M. Osman, Ahmed M. Abdrabou   +3 more
doaj   +1 more source

Dynamic Differential Protection of Transformer Considering CT Saturation Based on Waveform Distortion Estimation

IEEE Access
The protection relay performs a significant role in maintaining the power system’s reliability and stability. However, Current Transformer (CT) saturation affects the overcurrent, differential and distance protection under various conditions ...
Nilesh Chothani, Swapnil Kumar
doaj   +1 more source

A hybrid intelligent busbar protection strategy using hyperbolic S‐transforms and extreme learning machines

Engineering Reports, 2021
In power systems, busbars connect important components such as generators, transmission lines, and loads. A typical fault occurrence on the busbar may result in the isolation of faulty sections from other normally operating parts of the system resulting ...
Abolfazl Rahimnejad, Milad Gil, Aliakbar Abdoos, S. Andrew Gadsden   +3 more
doaj   +1 more source

Transmission Line Distance Protection Under Current Transformer Saturation

Journal of Modern Power Systems and Clean Energy, 2021
Conventional transmission line distance protection approaches are subject to malfunction under reverse fault-induced current transformer (CT) saturation for the typically employed breaker-and-a-half configuration.
Yuping Zheng, Tonghua Wu, Feng Hong, Gang Yao, Jimin Chai, Zhinong Wei   +5 more
doaj   +1 more source

Physics of the saturation of particle acceleration in relativistic magnetic reconnection

, 2017
We investigate the saturation of particle acceleration in relativistic reconnection using two-dimensional particle-in-cell simulations at various magnetizations \sigma.
Kagan, Daniel, Nakar, Ehud, Piran, Tsvi
core   +1 more source

Chiral Extrapolation of the Strangeness Changing K pi Form Factor [PDF]

, 2010
We perform a chiral extrapolation of lattice data on the scalar K pi form factor and the ratio of the kaon and pion decay constants within Chiral Perturbation Theory to two loops. We determine the value of the scalar form factor at zero momentum transfer,
A Kastner, A Lai, A Roessl, B Moussallam, B Moussallam, C Allton, C Aubin, C Dawson, CG Callan, D Becirevic, D Becirevic, Emilie Passemar, F Ambrosino, G Abbas, G Amoros, G Amoros, G Ecker, G Ecker, H Leutwyler, J Bijnens, J Bijnens, J Gasser, J Gasser, J Gasser, J Gasser, J Hirn, J Hirn, J Hirn, J Stern, JC Hardy, JM Flynn, K Kampf, M Ademollo, M Frink, M Jamin, M Jamin, P Buettiker, PA Boyle, PA Boyle, R Oehme, RF Dashen, S Descotes-Genon, S Descotes-Genon, S Descotes-Genon, S Descotes-Genon, TA Lahde, V Bernard, V Bernard, V Bernard, V Bernard, V Bernard, V Cirigliano, V Cirigliano, V Lubicz, Véronique Bernard   +54 more
core   +4 more sources

Experiments on CO2 foam seepage characteristics in porous media

Petroleum Exploration and Development, 2016
Simulative experiments were carried out for CO2 foam flooding process in homogeneous porous media prepared with the sand packing method, and the CO2 foam seepage characteristics in porous media were studied with CT technology.
Dongxing DU, Dexi WANG, Ninghong JIA, Weifeng LYU, Jishun QIN, Chengcheng WANG, Shengbin SUN, Yingge LI   +7 more
doaj   +1 more source