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Fault Line Selection Based on the Frequency Characteristics of Feeders
2020 IEEE 3rd Student Conference on Electrical Machines and Systems (SCEMS), 2020In resonant grounding system, the arc suppression coil could improve power supply reliability by compensating for capacitive fault current, which also makes fault line selection more difficult. This paper presents a fault line selection scheme which produces the line selection signal without changing the existing equipment.
Zhuoqun Wang +3 more
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Fault Line Selection in Resonant Grounded System Based on IMEn
Advanced Materials Research, 2014When the single phase ground fault occurs in resonant grounded system, there are significant differences in the components of fault phase current between fault line and non-fault line. This feature can be reflected by intrinsic mode entropy (IMEn) of fault current. IMEn is a new signal analysis over multiple oscillation levels.
Meng Zhang, Jian Wen Ren
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Research on Wavelet Transformation for Fault Line Selection of Distribution Network
2020 5th International Conference on Power and Renewable Energy (ICPRE), 2020Single-phase ground fault is one of the main reasons in distribution network fault. The fault line selection is the key step of fault location. In this paper, Db4 transform is used to decompose and reconstruct the fault bus zero-sequence voltage and the zero-sequence current of each feeder in five layers, which respectively extracts the high-frequency ...
Yang Wang +4 more
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The Summarization of Fault Line Selection of Small Current Grounding System
Applied Mechanics and Materials, 2014With the development of power technology and the improvement of reliability of power supply of power user requirement, small current grounding system become the main grounding mode of distribution network. Small current grounding power system fault line selection is always one of the puzzles in medium voltage distribution network relay protection ...
Zhi Xia Zhang, Zhi Lei Wang, Kun Li
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A novel fault line selection method of resonant grounding system
2017 IEEE Conference on Energy Internet and Energy System Integration (EI2), 2017In order to solve the problems of fault line selection in resonant grounding system, a novel fault line selection method for distribution network was proposed in this paper. First, continuously measure three-phase voltage and zero-sequence voltage, which detects single-phase ground fault.
Yongjun Yuan +5 more
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Fault line selection based on cross wavelet and Romanovsky Criterion
2019 IEEE 3rd International Electrical and Energy Conference (CIEEC), 2019A fault line selection method for small current grounding systems based on cross wavelet transform (XWT) and Romanovsky criterion is proposed. The transient zero-sequence current of each branch is analyzed by cross-wavelet transform. The characteristic time-frequency window with significant correlation is adaptively determined according to the cross ...
Jianwen Zhao +4 more
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A new principle of fault line selection for distribution
7th International Conference on Developments in Power Systems Protection (DPSP 2001), 2001Fault line selection is important to maintenance and normal operation of power distribution system. If a fault does not disappear for a long time, it could develop into a phase to phase fault. Then the fault line should be found out as quickly as possible and the fault should be removed.
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Application of distributed fault line selection device in digital substation
2010 5th International Conference on Critical Infrastructure (CRIS), 2010At present, the small analog signal transmission is adopted between process level and bay level in most of the digital substation systems below 35kV. Considering the characteristic of the structure and the special request for the earth fault line selection device, the design of line selection device is proposed for the digital substations.
null Qi Zheng +2 more
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Research on fault line selection in small-current neutral grounding power system
Proceedings of 2013 IEEE International Conference on Vehicular Electronics and Safety, 2013A method of fault line selection was proposed based on fault grounded point transfer and wavelet transform in small-current neutral grounding system in this paper. Phase-separation vacuum circuit breaker was installed in the busbar and realize fault grounded point transfer through vacuum breaker of fault phase when single-phase-to-ground fault occurs ...
Hai-Jun Cheng, Hui Meng, Pi-Jie Jiang
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Summary of Fault Line Selection for Single-phase Grounding in Small Current Systems
2020At present, fault line selection theory of small current grounding system mainly focuses on solving the reliability problem of urban power supply system. There is little research on the line selection theory of mine distribution network, but single phase ground fault in mine distribution network will cause more harm.
Xianhui Zhu +4 more
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