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A new single-phase-to-ground fault-detecting relay
Electrical Engineering, 1942In the application of differential relays the need for a supervising relay which will detect the existence of a single-phase-to-ground fault condition to the exclusion of all others has frequently arisen. Heretofore, the only scheme available has been to utilize a relay energized by zero-sequence quantities. Generally, the relay has been energized by a
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Transient processes at single phase-to-ground faults in combined grounded networks
2012 Electric Power Quality and Supply Reliability, 2012This paper deals with the combined method of neutral grounding when a high-value resistor is continuously connected to a neutral in parallel with a Petersen coil. Monitoring of processes at single phase-to-ground faults was organized in the 6 kV network of the large-scale iron and steel plant.
Andrey Shirkovets +3 more
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2020 5th International Conference on Power and Renewable Energy (ICPRE), 2020
The fault characteristics of the small current grounding system are not obvious when the fault occurs. Currently, it is hard to accurately select and locate the ground fault in the small current grounding system. Therefore, in this paper, a scheme of fault grounding line selection and location is proposed based on the characteristic of the zero ...
Kaiji Liao +4 more
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The fault characteristics of the small current grounding system are not obvious when the fault occurs. Currently, it is hard to accurately select and locate the ground fault in the small current grounding system. Therefore, in this paper, a scheme of fault grounding line selection and location is proposed based on the characteristic of the zero ...
Kaiji Liao +4 more
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Estimating locations of single-phase-to-ground faults of ungrounded distribution systems
IEEE PES ISGT Europe 2013, 2013This paper proposes a new method for determining single-phase-to-ground fault locations of ungrounded distribution systems based on the measurements collected from the feeder breakers and intelligent switches during the fault. The method first narrows down the possible faulted area into a specific feeder section based on the reactive power factors of ...
Hongbo Sun 0003 +4 more
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Single-phase grounding fault identification and fault line selection for compensation grid
Proceedings of The 7th International Power Electronics and Motion Control Conference, 2012A new grounding fault line selection method based on small-world network theory is proposed in order to solve the problems existing in grounding fault line selection device of compensation grid, such as that the correct rate of grounding fault line selection is not high and the selection device cannot recognize high-impedance and low-impedance ...
null Chen Zhongren +2 more
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Detection of places of single-phase ground fault by frequency of the resonance
2016 57th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), 2016Long-term single-phase ground fault in overhead 6–35 kV power lines with isolated neutral, accompanied by intermittent arc, lead to overvoltage and damage of electrical equipment. In turn, precise localisation of the damaged sections of the overhead power lines is a challenging task, as external inspection of power lines takes a lot of time, effort and
Aleksander Fedotov +3 more
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Study on Fault Location of Single-Phase-to-Ground for Distribution Network
Advanced Materials Research, 2012The AC-DC method (the AC method combined with the DC method) has integrated the superiority of the AC method’s easy measurement and the DC method’s reliability, so it has achieved some degree of use. The method before only took the ground resistor as the condition of combination, so it is not perfect.
Li Zhang, Xiu Yuan Yang, Jun Ling Ren
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Ground-fault loop impedance calculations in single-phase systems
49th IEEE/IAS Industrial & Commercial Power Systems Technical Conference, 2013Protection against electric shock in low-voltage installations by automatic disconnection of the supply must be provided in compliance with applicable national or international standards. Such regulations (e.g. National Electrical Code in the U.S., IEC 60364, BS 7671 in the U.K., etc.) take into account the earthing system of the installation, such as ...
Haijun Liu, Massimo Mitolo, Jun Qiu
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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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A survey on faulty line selection technology for single-phase-to-ground fault in China
2013 IEEE Industry Applications Society Annual Meeting, 2013Single-phase-to-ground fault is difficult to detect with traditional methods in NIEPS because of minor fault current, fault arc, harmonics influence and the protection principle limitation. In order to improve the precision and reliability of traditional faulty line selection technologies for NIEPS, more attention has been paid by many researchers over
Yuanyuan Wang +3 more
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