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Continuous comprehensive line selection technology based on D-S evidence theory
Energy Reports, 2022 Aiming at the single-phase grounding fault in 380 V three-phase AC power system with ungrounded neutral, a fault line selection method considering zero sequence current ratio method, zero sequence current phase ratio method and dual frequency method is ...
Kechang Dai, Zhihao Ye, Liang Chen
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Grounding Fault Line Selection by EMD and LSSVM [PDF]
Advances in Economics, Business and Management Research, 2015 According to the characteristics of transient zero sequence components as well as the existing information fusion technology has the disadvantage of high sample dimension and computer overhead in fault line selection in small current grounding fault . First of all, by using the empirical mode decomposition (EMD) and the Fast Fu Liye transform (FFT) on ...
Xiaofang Cao, Tianyi Qu
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Frontiers in Energy Research, 2022 It is important to select the fault line rapidly when single-phase grounding fault occurs in the small current grounding system. The fault information acquisition of existing methods generally need hardware modification, so the high cost makes it ...
Junyang Tian +4 more
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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
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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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Single‐pole fault line selection method for MVDC distribution grid based on 0‐mode power
IET Generation, Transmission & Distribution, 2021 At present, the MVDC distribution grid is developing rapidly and relay protection is the key technology to ensure stable operation. Therefore, this paper focuses on the fault line selection method.
Shuping Gao +4 more
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Journal of Harbin University of Science and Technology, 2021 In order to enhance effectiveness of single-phase ground fault feature extraction and to achieve exactly identification of fault line selection，a new fault line selection method of single phase grounding fault based on wavelet packet and online ...
JI Wen-lu +4 more
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Research on Arc Grounding Fault Selection Method of Distribution Network Based on Wavelet Analysis [PDF]
Zhengzhou Daxue xuebao. Gongxue ban, 2023 Chinese urban low-voltage distribution network capacitance current rose sharply, single-phase ground fault arc was difficult to self-extinguish and easy to produce arc light ground overvoltage and lead to accidents.
LI Jingli +5 more
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Gong-kuang zidonghua, 2014 In view of problems of complex fault situation and unobvious characteristics of fault signal of fault line selection method of existing small current grounding system, a fault line selection method of small current grounding system based on wavelet ...
WANG Xiaowei +3 more
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Journal of Hebei University of Science and Technology, 2021 In order to solve the problem that the fault line cannot be accurately identified after single-phase grounding fault occurs in power grid,an intelligent sensing method of residual current grounding fault based on wavelet packet decomposition was proposed.
Bingyu LI +5 more
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