Results 31 to 40 of about 136,863 (312)

Evaluation of the Transient Overvoltages of HVDC Transmission Lines Caused by Lightning Strikes

Energies, 2022
High-voltage direct-current (HVDC) transmission systems are considered an outstanding solution due to high electrical losses emerging from long-distance transmission. However, HVDC transmission lines (TLs) are vulnerable to lightning strikes.
Amr S. Zalhaf, Ensheng Zhao, Yang Han, Ping Yang, Abdulrazak H. Almaliki, Reda M. H. Aly   +5 more
doaj   +1 more source

Research on selective leakage protection of 10 kV system based on transient characteristic parameters in coal mine

Meikuang Anquan, 2022
When a single-phase grounding fault occurs in the coal mine 10 kV power supply system, due to the low sampling frequency of the system, the traditional transient line selection method is easy to lose the “line selection information”, and is greatly ...
GUO Runshou, CAO Jiyuan
doaj   +1 more source

Design of Grounding Grid for Main Substations in High Soil Resistivity Areas Based on CDEGS Software

Chengshi guidao jiaotong yanjiu
Objective To address the difficulty of reducing the grounding resistance of main substations in high soil resistivity areas, it is necessary to study the design of grounding grids for main substations in such regions.
CAO Jianshe
doaj   +1 more source

Fault Protection Based on the Ratio of Zero-sequence Current Projection Components for Low-resistance Grounding System

Taiyuan Ligong Daxue xuebao, 2021
The electrical characteristics of a single-phase grounding fault in a low-resistance grounding system was aualyzed, and a fault protection scheme was proposed for low-resistance grounding systems according to the ratio of the zero-sequence current ...
Yuan NIU, Wenping QIN, Fuliang XIA, Xin SHANGGUAN, Pengfei ZUO   +4 more
doaj   +1 more source

The High Voltage Feedthroughs for the ATLAS Liquid Argon Calorimeters [PDF]

, 2007
The purpose, design specifications, construction techniques, and testing methods are described for the high voltage feedthrough ports and filters of the ATLAS Liquid Argon calorimeters.
, A Talalaevskii, ASTM, ATLAS collaboration, ATLAS collaboration, B Botchev, Douglas Electrical Components (formerly Douglas Engineering Company), G Finocchiaro, Ground-R-Guide, HABIA Cable, J Farrell, J Hoffman, J Steffens, J.R. Perkins, Kynar, M Rijssenbeek, M Thioye, M Zdrazil, Mylar by DuPont, NASA, NOVACAP, NOVACAP, Product no. 0037, R L McCarthy, S Kan, T. Droege, Tefzel, TRA-CON   +27 more
core   +2 more sources

Molecular bases of circadian magnesium rhythms across eukaryotes

FEBS Letters, EarlyView.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source

Ground distance relaying algorithm for high resistance fault

IET Generation, Transmission & Distribution, 2010
This study proposes a new fault impedance estimation algorithm of phase-ground fault for ground distance relaying based on the negative-, zero- and comprehensive negative-zero-sequence current component. The principle is based on the assumption that fault path is purely resistive, and the phase angle of fault point voltage and fault path current is ...
Z.Y. Xu, S.J. Jiang, Q.X. Yang, T.S. Bi
openaire   +1 more source

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Feasibility Analysis of Application of HX Series Electric Locomotive Under Ground Fault Mode

机车电传动, 2021
Three grounding fault detection schemes of HX series electric locomotives were introduced, and it was evaluated whether there were potential electrical safety hazards when single point grounding occured in different grounding ranges under different ...
Yanmin ZHANG, Fengrong HAO, Guangxing TIAN, Ying FU, Baosheng SUN, Jianlong CHEN   +5 more
doaj  

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

FEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman, Anna E. Lester, Brian D. Zoltowski   +2 more
wiley   +1 more source