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| Fault feeder detection method for single-phase earth fault in small current grounding system based on difference of sequence components |
| Yang Fan1, Mou Longhua1, Zhang Xin1, Qiu Jin2 |
1. Department of Electrical Engineering, Tongji University, Shanghai 201804;
2. China Electric Power Research Institute, Wuhan 430074 |
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Abstract There are certain limitations in fault feeder detection by using the zero-sequence current characteristics of single-phase earth faults in small current grounding systems. In view of this problem, this paper starts with the principle and distributional characteristics of the negative sequence current of single-phase earth fault, and illustrates the superiority of fault feeder detection based on negative sequence current. By comparing the transient amplitude characteristics of zero-sequence current and negative-sequence current of each feeder after fault, a transient fault feeder detection method based on the difference of sequence components is proposed. The method has high line selection accuracy and high sensitivity to fault feeder detection of high-resistance grounding or zero-crossing grounding. Simulation experiments verify the effectiveness of the proposed method.
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Received: 05 September 2018
Published: 19 March 2019
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| Cite this article: |
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Yang Fan,Mou Longhua,Zhang Xin等. Fault feeder detection method for single-phase earth fault in small current grounding system based on difference of sequence components[J]. Electrical Engineering, 2019, 20(3): 13-17.
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| URL: |
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http://dqjs.cesmedia.cn/EN/Y2019/V20/I3/13
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2019, Vol. 20 
