Results 21 to 30 of about 44,894 (246)

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

Measurement of resistance temperature characteristics of graphite based flexible grounding body with current heating voltammetry

Xi'an Gongcheng Daxue xuebao, 2022
The resistance temperature characteristics and thermal stability of graphite based flexible grounding materials were studied. With the method of current heating and constant temperature protection, the resistance of grounding body at each temperature was
HU Songjiang, CHEN Sifu, LIU Liqin, LI Fulei, DING Weidong, WANG Yang, CAO Wen   +6 more
doaj   +1 more source

Improved transient simulation of salient-pole synchronous generators with internal and ground faults in the stator winding [PDF]

, 2005
An improved model for simulating the transient behavior of salient-pole synchronous generators with internal and ground faults in the stator winding is established using the multi-loop circuit method.
Bi, D.Q., Howe, D., Wang, W.J., Wang, X.H., Zhu, Z.Q.   +4 more
core   +1 more source

High-resistance Grounding Fault Detector by Use of Feeding Current

Quarterly Report of RTRI, 2008
The detection of high-resistance grounding faults in DC electric railways is difficult due to the impossibility of distinguishing fault current from load current in such systems. We therefore propose a new detection method to distinguish fault current from load current using the total feeding current of two substations. The technique takes advantage of
Shin-ichi HASE, Akinobu OKUI, Shiro SEKIJIMA, Shunichi SUGAI, Masataka AKAGI, Takashi KIMURA   +5 more
openaire   +2 more sources

Power frequency interference and suppression in measurement of power transmission tower grounding resistance [PDF]

, 2014
“If you want peace, work for justice.” – Pope Paul VI This paper explores how the children’s right to be heard is implemented in the criminal proceedings in Romania and Norway.
Wenjun, Zhou, Yushun, Liu, Li, Gongxin, Yan, Guozhi, Yang, Shuai, Li, Han, Zhou, Chengke, Su, Charles Qi   +7 more
core   +3 more sources

Fault line selection method for coal mine power grid based on RCMDE and KFCM

Gong-kuang zidonghua, 2022
It is difficult to accurately select the fault line when the single-phase ground fault occurs in the coal mine power grid with the widely used resonant grounding system.
HAN Guoguo, SHI Xiaojun, WANG Hui, CHENG Weijian, MU Yanxiang   +4 more
doaj   +1 more source

Transient behavior of wind towers grounding systems under lightning strikes [PDF]

, 2015
Wind turbines, because of their height and localization, are frequently subject to direct lightning strikes. Thus, the investigation on the performance of their grounding system is of paramount interest for the prediction of the potential threats either ...
ARANEO, Rodolfo, CELOZZI, Salvatore
core   +1 more source

A Novel High-Frequency Voltage Standing-Wave Ratio-Based Grounding Electrode Line Fault Supervision in Ultra-High Voltage DC Transmission Systems

Energies, 2017
In order to improve the fault monitoring performance of grounding electrode lines in ultra-high voltage DC (UHVDC) transmission systems, a novel fault monitoring approach based on the high-frequency voltage standing-wave ratio (VSWR) is proposed in this ...
Yufei Teng, Xiaopeng Li, Qi Huang, Yifei Wang, Shi Jing, Zhenchao Jiang, Wei Zhen   +6 more
doaj   +1 more source

Analysis of fault current and overvoltage at the neutral point of ±800 kV High-Voltage DC converter transformer

Energy Reports, 2022
In order to enhance the security of ±800 kV High-Voltage DC (HVDC) system, it is needed to consider and analyze the grounding mode of the neutral point of converter transformer.
Jiaqing Fu, Yang Han, Ping Yang, Congling Wang, Amr S. Zalhaf   +4 more
doaj   +1 more source

Detection of Irregular Sheath Current Distribution for Diagnosis of Faults in Grounding Systems of Cross-Bonded Cables

IEEE Access, 2023
Sheath currents in high voltage cable circuits have proven to be one of the most convenient indicators for assessing cable health. The sheath currents are regularly distributed with fluctuation in a certain range under normal conditions, while the ...
Gen Li, Jie Chen, Hongze Li, Libin Hu, Wenjun Zhou, Chengke Zhou   +5 more
doaj   +1 more source