A novel approach treating single-phase ground fault in distribution system

被引：0
|
作者：
Liu J. [1 ]
Zhang X. [1 ]
Li P. [1 ]
Zhang Z. [1 ]
Quan L. [1 ]
机构：
[1] Shaanxi Electric Power Research Institute, Xi'an, 710054, Shaanxi Province
来源：
| 1600年 / Power System Technology Press卷 / 40期
关键词：
Arc blowing; Distribution grids; Instantaneous faults; Permanent faults; Single-phase ground faults; Zero sequence current;
D O I：
10.13335/j.1000-3673.pst.2016.11.045
中图分类号：
学科分类号：
摘要：
To improve single-phase ground fault treatment in distribution systems, a new approach based on arc blowing and zero sequence current increasing was put forward. Corresponding device was developed, composed of a controller, a single-phase arc blower and a resistor connected to neutral point with a switch. Once single-phase ground fault was detected, corresponding single-phase arc blower turned on the switch to ground the phase to blow out the arc. The switch was turned off after a certain time delay. Treatment of an instantaneous fault is thus finished if arc reignition didn't occur. Otherwise, it was identified as permanent fault, where the resistor would be connected to neutral point by turning on corresponding switch. Therefore, zero sequence current along up-stream of grounding point is increased remarkably, so that easy to detect. Permanent single-phase ground fault may be treated with coordination of distribution automation system (DAS) or zero sequence current based relay protection. Feasibility and effectiveness of the proposed approach and device was verified with an experiment in a 10 kV distribution system. An example was also given to describe application of the proposed method. © 2016, Power System Technology Press. All right reserved.
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页码：3586 / 3590
页数：4
相关论文
共 13 条
  • [1] Cheng L., Chen Q., A survey on faulty line selection technology for single-phase grounded transmission line in small current neutral grounded system, Power System Technology, 33, 18, pp. 219-224, (2009)
  • [2] Wang H., Fan Z., The"S Signal Injection Method"and its application in single phase-to-earth fault line identification and fault point location, Electric Power Automation Equipment, 19, 3, pp. 18-20, (1999)
  • [3] Chen H., Chen W., Zero-sequence current and new method of fault line location in distribution network, High Voltage Engineering, 33, 1, pp. 49-52, (2007)
  • [4] Wang Q., Wang B., Single phase earth fault line selection of resonant grounding system based on residual current incremental method, Qinghai Electric Power, 1, pp. 50-52, (2010)
  • [5] He R., Pan J., Huo C., Faulty line selection based on variable reactance, Electric Power Automation Equipment, 27, 12, pp. 48-52, (2008)
  • [6] Xiong R., Zhang H., Zhang C., Study of an intelligent selection device in indirect-grounded fault system, Relay, 34, 6, pp. 6-10, (2006)
  • [7] Zheng G., Du X., Qi Z., Research and implementation of neutral ineffective single-phase ground fault online location device, Power System Protection and Control, 40, 8, pp. 135-139, (2012)
  • [8] Liang R., Xin J., Wang C., Fault line selection in small current grounding system by improved active component method, High Voltage Engineering, 2, pp. 375-379, (2010)
  • [9] Tang K., Tang C., Luo J., A new method of single terminal fault location for distribution network based on eigenvalue, Power System Technology, 38, 3, pp. 762-767, (2014)
  • [10] Li Y., Meng X., Song X., Et al., Single-phase-to-ground fault line detection for distribution network based on optimal Finite impulse response filter and hierarchical clustering, Power System Technology, 39, 1, pp. 143-149, (2015)
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