Results 21 to 30 of about 23,164 (247)

Research on influencing factors of arc grounding over-voltage in mine power supply system

Gong-kuang zidonghua, 2017
In order to comprehensively study influence factors such as grounding resistance, line resistance, fault location, grounding capacitance, interphase capacitance and arc ignition time on arc grounding over-voltage in mine power supply system, typical mine
LIU Jucai, GENG Pulong, QU Bingni, SONG Jiancheng, LUO Chao, LI Yongxue, YUAN Leiming   +6 more
doaj   +1 more source

Comprehensive Modeling of Transient Analysis of Grounding System under Lightning Surges [PDF]

مجله مدل سازی در مهندسی, 2019
During lightning discharge, the transient performance of grounding system is influenced by the time-dependent nonlinear behavior related to soil ionization and frequency dependence of soil electrical parameters related to high-frequency spectrum of ...
Jalil Ghayur safar, Reza Shariatinasab
doaj   +1 more source

Modeling of different tower grounding systems using hybrid continuous circuit-trapezoidal integration method [PDF]

Serbian Journal of Electrical Engineering, 2021
In order to protect the transmission lines against lightning strikes, it is important to investigate the tower grounding system. In this paper, a recent method called hybrid continuous circuit-trapezoidal integration method is used to calculate ...
Asadpourahmadchali Mohammadbagher, Niasati Mohsen, Alinejad-Beromi Yousef   +2 more
doaj   +1 more source

Research and application of substation grounding wire error prevention management technology based on wireless radio frequency and short-distance communication

Diance yu yibiao
Aiming at the problems that the existing grounding wire management technology is immature when the power grid is overhauling and hanging grounding wires, which is easy to cause power grid accidents such as missed disassembly and wrong connection, this ...
QIAN Ping, DAI Zheren, QIN Wei, LING Qiuyang, XI Yujia, CHEN Yu   +5 more
doaj   +1 more source

A New Approach to Include Complex Grounding System in Lightning Transient Studies and EMI Evaluations

Energies, 2019
A new approach to lightning transient studies including complex grounding grids is presented in this paper. The grounding system is modeled in Matlab/Simulink based on the transmission line theory.
Vegard Steinsland, Lasse Hugo Sivertsen, Emil Cimpan, Shujun Zhang   +3 more
doaj   +1 more source

Study on a standard for grounding systems realization [PDF]

Serbian Journal of Electrical Engineering, 2012
Grounding systems of objects inside power facilities are very often realized as structures consisting of protective electrodes’ system placed in the object foundation, and neutral electrodes’ system placed at a specified distance from the object.
Vučković Dragan D., Cvetković Nenad N., Stojanović Miodrag S.   +2 more
doaj   +1 more source

Investigation and Optimization of Grounding Grid Based on Lightning Response by Using ATP-EMTP and Genetic Algorithm

Complexity, 2018
A large number of electromagnetic transient studies have been analyzed for finding the overvoltage behavior of power system. A grounding grid of power system is so important for reducing the effect of overvoltage phenomena during a short-circuit event ...
Saeid Gholami Farkoush, Tahir Khurshaid, Abdul Wadood, Chang-Hwan Kim, Kumail Hassan Kharal, Kyu-Ho Kim, Namhun Cho, Sang-Bong Rhee   +7 more
doaj   +1 more source

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

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

The point ground electrode in vicinity of the semi-spherical inhomogenity [PDF]

Serbian Journal of Electrical Engineering, 2005
Characterization of the point ground electrode placed in the surroundings or inside of the semi-spherical earth inhomogenity and fed by low frequency (LF) current using isolated earthling conductor, is presented in this paper.
Cvetković Nenad N., Rančić Predrag D.
doaj   +1 more source