110 kV沙土变同等条件下不同中性点接地设备故障处理对比试验及其分析

Comparative Test and Analysis of Fault Treatment in Different Neutral Grounding Equipment under the Same Condition

2015年10月,国网江西省电力公司赣西供电分公司在同等条件下分别对自动消弧线圈和ZXC系列主动干预型故障相转移接地装置做了单相瞬时性接地故障、单相永久性接地故障处理试验。试验结果表明:自动消弧线圈由于补偿后的残流控制的不好,不能及时熄灭瞬时性接地电弧,对永久性接地故障接地选线的准确率仅为33%;ZXC系列主动干预型故障相转移接地装置能及时消除瞬时性接地故障,选线准确率达100%,能及时选出并切除永久性接地故障。确保了故障点的安全。

In October 2015, State Grid Jiangxi Electric Power Company in Power Supply Company made single-phase instantaneous ground fauh on the automatic arc-suppressing coil and ZXC series active interferential fault phase-shift grounding device under the same conditions, the single-phase permanent grounding fault handling test.. Experimental results show that the automatic arc suppression coil due to residual current compensation control is not good, Can not extinguish the instantaneous grounding arc in time, the accurate rate of permanent grounding fault grounding line selection is only 33%; ZXC series of active intervention type fault phase transfer grounding device can eliminate the transient grounding fault the accurate rate of 100%, line selection, timely select and remove permanent grounding fault, to ensure the safety of the fault point.