Grounding Fault Direction Algorithm Using Zero-sequence Current in Resonant Grounding System

被引：0
|
作者：
Jin X. [1 ]
Xue Y. [1 ]
Peng Z. [2 ]
Yang F. [3 ]
Xu B. [4 ]
机构：
[1] College of New Energy, China University of Petroleum (East China), Qingdao
[2] Nanchang Power Supply Company, State Grid Jiangxi Electric Power Co., Ltd., Nanchang
[3] Electric Power Research Institute of State Grid Hubei Electric Power Co., Ltd., Wuhan
[4] Shandong Kehui Power Automation, Zibo
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2020年 / 44卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Fault direction; Polarization phasor; Resonant grounding system; Single-phase grounding fault;
D O I：
10.7500/AEPS20190319001
中图分类号：
TM72 [输配电技术];
学科分类号：
摘要：
Most distribution terminals are difficult to obtain zero-sequence voltage or three-phase voltage signals. So the application of transient power direction method in fault location, multi-level protection and demarcation of single-phase grounding fault in resonant grounding system is limited. The relationship of the initial phase angle with different components of zero-sequence current of fault points on upstream and downstream, with single-phase grounding fault in resonant grounding system, is analyzed. The components could be power frequency component, transient main resonance component or decaying DC component. It is found that the power frequency component of zero-sequence current can be used as the polarization phasor of the zero-sequence voltage, to further identify the fault direction using zero-sequence current only. The fault direction is positive, when the phase of power frequency component is within (-45°, 75°) and the phase of transient main resonant component is within (-30°, 30°), or the phase of power frequency component is within (135°, 255°) and the phase of transient main resonant component is within (150°, 210°), or the ratio of the amplitudes of decaying DC component to power frequency component is greater than the preset threshold. Otherwise, the fault direction is opposite. Both the simulation and the field fault data verify the correctness of the proposed method. © 2020 Automation of Electric Power Systems Press.
引用
收藏
页码：164 / 170
页数：6
相关论文
共 17 条
  • [1] Technical guidelines for distribution network: Q/GDW 10370-2016, (2017)
  • [2] Ma S., Xu B., Gao H., Et al., An earth fault locating method in feeder automation system by examining correlation of transient zero mode currents, Automation of Electric Power Systems, 32, 7, pp. 48-52, (2008)
  • [3] Xue Y., Li T., Li W., Et al., A novel method of transient analysis and faulty section location for single-phase earth fault in non-effectively earthed network, Automation of Electric Power Systems, 38, 23, pp. 101-107, (2014)
  • [4] Liu J., Liu C., Zhang X., Et al., Coordination of relay protection for power distribution systems, Power System Protection and Control, 43, 9, pp. 35-41, (2015)
  • [5] Xue Y., Song Y., Liu R., Et al., The processing technology of single-phase earth fault based on the transient power direction in non-solidly earthed network, Distribution & Utilization, 35, 8, pp. 3-8, (2018)
  • [6] Liu W., Xu B., Liu Y., Et al., Transient current based demarcation method of small current grounding fault, Automation of Electric Power Systems, 42, 24, pp. 157-162, (2018)
  • [7] Xue Y., Xu B., Feng Z., Et al., The principle of directional earth fault protection using zero sequence transients in non-solid earthed network, Proceedings of the CSEE, 23, 7, pp. 51-56, (2003)
  • [8] Sun B., Sun T., Xue Y., Et al., Single phase to ground fault section location based on transient signals in non-solidly earthed network, Automation of Electric Power Systems, 32, 3, pp. 52-55, (2008)
  • [9] Zhang L., Xu B., Xue Y., Et al., Transient fault locating method based on line voltage and zero-mode current in non-solidly earthed network, Proceedings of the CSEE, 32, 13, pp. 110-115, (2012)
  • [10] Song G., Li G., Yu Y., Et al., Single-phase earth fault section location based on phase current fault component in distribution network, Automation of Electric Power Systems, 35, 21, pp. 84-90, (2011)
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