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.
杨帆, 牟龙华, 张鑫, 邱进. 基于序分量差异性的小电流接地系统单相接地故障选线法[J]. 电气技术, 2019, 20(3): 13-17.
Yang Fan, Mou Longhua, Zhang Xin, Qiu Jin. Fault feeder detection method for single-phase earth fault in small current grounding system based on difference of sequence components. Electrical Engineering, 2019, 20(3): 13-17.
2019, Vol. 20 
