配电网树线放电故障容性电流转移消弧实验研究

山区配电网发生树线放电故障可能诱发山火，因此需研究低成本、易控制的配电网树线放电故障消弧措施。基于10 kV配电线路实验平台，对配电网树线放电故障容性电流转移消弧进行了实验研究。实验表明，容性电流转移开关闭合后，故障点电弧或亮斑消失，烟雾消散，故障点电流由数百mA降低至20 mA左右，表明该方法具备良好的消弧效果。容性电流转移时间与接地转移开关固有动作时延接近。进一步设置了不同的容性电流和树木电阻，均能实现有效熄弧，且转移时间与树木电阻和容性电流均无明显关系，表明了容性电流转移消弧方法的普适性。

Experimental Study on Capacitive Current Transfer Arc Suppression of Tree-line Discharge Fault in Distribution Network

The tree-line discharge faults of mountainous distribution networks may induce forest fires, so it is indispensable to study the low-cost and easy-to-control arc suppression measures for tree-line discharge faults in distribution networks. Based on a 10 kV distribution line experimental platform, the paper conducted an experimental study on the capacitive current transfer arc suppression for tree-line discharge faults in distribution networks. The experiments show that when the capacitive current transfer switch is closed, the arc or bright spot at the fault point disappears and the smoke dissipates, and the fault point current is reduced from several hundreds mA to about 20 mA, indicating that the method has a good arc suppression effect. The capacitive current transfer time is close to the intrinsic action time delay of the grounding transferring switch. Furthermore, different capacitive current and tree resistance are set to achieve effective arc suppression, and the transfer time is not significantly related to either tree resistance or capacitive current, demonstrating the universality of the capacitive current transfer arc suppression method.