Results 11 to 20 of about 89,125 (297)
Gong-kuang zidonghua, 2015 For the problem that failure current was small of grounding point of neutral point grounding system grounded by arc suppression coil when single-phase ground fault occurs, the paper proposed a kind of current leakage protection method of coal mine based ...
CHEN Zhaoye +4 more
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Meikuang Anquan, 2020 In order to provide theoretical support for the necessity of remote manual leakage tripping test, the distributed parameter circuit theory is applied to analyze the underground power supply system. By comparing and analyzing the AC equivalent circuit of
GUO Chunping
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Brief Analysis of Leakage Protection System of Coal Preparation Plant
Gong-kuang zidonghua, 2011 The paper analyzed hazards of leakage and current status of leakage protection system of domestic coal preparation plant, and put forward proposals that coal preparation plant should construct leakage protection system.
ZHANG Bo, LI Yan-chong
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A New Method of Using Pulse Broadening to Realize Selective Leakage Protection in Coal Mine
Gong-kuang zidonghua, 2010 In order to improve the reliability of selective leakage protection of power network in mine, a hardware circuit using pulse broadening to realize selective leakage protection of zero-sequence current direction was proposed. Its test on 660 V test device
HU Xiao-dong, TONG Ju
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Gong-kuang zidonghua, 2010 The paper explained that traditional leakage protection principles such as zero-sequence direction relay principle and zero-sequence current's maximum principle are unable to implement selective leakage protection in situation of great disparity between ...
SU Po, CHEN Qing
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Design of a mine-used low-voltage leakage protection device
Gong-kuang zidonghua, 2020 In view of low reliability of leakage protection device of coal mine low-voltage power grid based on line selection principle of zero-sequence power direction, a hardware and software design scheme of mine-used low-voltage leakage protection device was ...
ZHENG Qingle +3 more
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Intelligent leakage protection method of mine power grid based on equivalent conductance
Gong-kuang zidonghua, 2020 The phenomenon of harmonic wave and arc light in mine power grid is increasingly serious, and leakage fault signal distortion and probability of arc light leakage increases, resulting in serious fault signal distortion and less fundamental wave component.
WANG Qingliang +5 more
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A line selection method of mine leakage protectio
Gong-kuang zidonghua, 2020 Aiming at problem of low accuracy of line selection when single-phase grounding fault occurs in mine power supply system at present, according to characteristics of obvious difference of zero-sequence current waveform between fault line and non-fault ...
YU Qun, SHANG Xueli
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Asymptotic information leakage under one-try attacks [PDF]
, 2011 We study the asymptotic behaviour of (a) information leakage and (b) adversary’s error probability in information hiding systems modelled as noisy channels.
Pampaloni, Francesca +5 more
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Leakage protection system of underground power grid based on ZigBee wireless sensor network
Gong-kuang zidonghua, 2014 In view of shortcomings such as poor reliability, high error rate existed in current leakage protection system of underground high-voltage power grid，a design scheme of leakage protection system of underground power grid based on ZigBee wireless sensor ...
ZHU Yankai +4 more
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