Results 31 to 40 of about 5,287 (159)

Analysis of Transformer Insulation Risk Due to Back Flashover Lightning on High Voltage Substations by Considering the Effect of Environmental Pollution [PDF]

مجله مدل سازی در مهندسی
The improved limiting parameter method of Monte Carlo is used in this study to estimate the impact of back-flashover (BF) due to lightning and provide an evaluation criterion for the insulation risk of the transformer in the high-voltage substation.
Faridoddin Safaei, Mohsen Niasati
doaj   +1 more source

Study on the impact of AC system operating frequency elevation on overvoltage characteristics and equipment insulation levels of converter stations

Zhejiang dianli
The economic advantages of medium-frequency AC collection and flexible DC transmission make it a key choice for deep-sea wind power development， where overvoltage and insulation coordination emerge as critical technical bottlenecks.
YE Wenyao, LU Yi, QIAN Zhengxu, XU Feng, LU Chengyu, ZHANG Zheren, XU Zheng   +6 more
doaj   +1 more source

Design and Test of 500-kV Lightning Protection Insulator

IEEE Access, 2019
In this paper, based on insulation coordination and simulation, a lightning protection composite insulator is proposed, made up of an insulation part and an arrester part connected in series, whose length is close to that of the standard composite ...
Zhenglong Jiang, Wei Wu, Bowen Wang, Pengkang Xie, Hua Li, Fuchang Lin   +5 more
doaj   +1 more source

Highly conductive polymer nanocomposites for emerging high voltage power cable shields: experiment, simulation and applications

High Voltage, 2020
High voltage power cables play a critical role in global electricity transmission and distribution. The currently used power cables cannot fulfil the green and sustainable requirement of modern society because of the thermoset nature of cable insulation ...
Xingyi Huang, Boyang Sun, Boyang Sun, Chunyang Yu, Jiandong Wu, Jun Zhang, Pingkai Jiang   +6 more
doaj   +1 more source

Statistical approach for insulation coordination of high voltage substation exposed to lightning strikes

Electrical engineering & Electromechanics
Introduction. Insulation coordination requires accurate prediction of overvoltages at various points within a substation. Computer simulations of electromagnetic transients in real structures of substations become more precise due to the improvements of ...
S. Bedoui, A. Bayadi
doaj   +1 more source

Transient Behaviour of Superconducting Magnet Systems of Fusion Reactor ITER during Safety Discharge

Modelling and Simulation in Engineering, 2008
To investigate the transient behaviour of the toroidal and poloidal field coils magnet systems of the International Thermonuclear Experimental Reactor during safety discharge, network models with lumped elements are established.
A. M. Miri, S. Fink, W. H. Fietz
doaj   +1 more source

Portable High Voltage Impulse Generator

Ingeniería e Investigación, 2011
This paper presents a portable high voltage impulse generator which was designed and built with insulation up to 20 kV. This design was based on previous work in which simulation software for standard waves was developed.
S. Gómez, M. P. Buitrago, F. A. Roldán
doaj  

Recent advances in understanding the cellular roles of GSK-3 [version 1; referees: 3 approved]

F1000Research, 2017
Glycogen synthase kinase-3 (GSK-3) is a ubiquitously expressed protein kinase that sits at the nexus of multiple signaling pathways. Its deep integration into cellular control circuits is consummate to its implication in diseases ranging from mood ...
Kevin W. Cormier, James R. Woodgett
doaj   +1 more source

Long-term field measurement and characteristics of lightning-induced overvoltages on 10 kV distribution lines in high-altitude mountainous areas and optimization of insulation coordination

Results in Engineering
Aiming at the lack of measured data on lightning overvoltages in operational distribution networks and the irrationality of insulation coordination based on standard lightning impulse waveforms, this paper carries out large-scale and long-term ...
Li Shao, Ke Wang, Zhisong Xu, Hao Yang, Ran Huang, Bao Zhao, Hengxin He   +6 more
doaj   +1 more source

Transient overvoltage on overhead metal return lines of ±500 kV MMC-HVDC grid

The Journal of Engineering, 2018
The ±500 kV half-bridge modular multilevel converter-high-voltage DC (MMC-HVDC) grid project with overhead transmission line is under construction in China at present.
Huiwen He, Xiaolan Li, Ying Lou, Lei Wang, Peihong Zhou   +4 more
doaj   +1 more source