摘要
在绝缘子两端并联熔丝,通过熔丝熔断引弧模拟绝缘子闪络,研究单相接地故障熄弧时间。在10 kV模拟配电网中对P-15、P-20型针式绝缘子进行试验,配置电容器改变故障点电流,通过统计学方法得到不同电流下置信度为95%的熄弧时间。同时,改变熔丝直径,比较不同熔丝材料及连接方式对熄弧时间的影响,通过本文的试验方法可以测定不同故障电流、不同工况下单相接地故障熄弧时间,从而为单相接地故障处理装置判断单相接地故障性质提供参考。
This paper makes a study on the arc extinguishing time of single-phase grounding fault by means of connecting a fuse in parallel at both ends of the insulator and causing a fuse burn-out to start arc to simulate the flashover of the insulator. In the 10 kV analog distribution network is conducted the experiment on P-15 and P-20 pin-typed insulators,and the capacitor is configured to change the fault point current,obtaining the arc extinguishing time with 95% confidence of different current by use of statistical method. At the same time,the fuse diameter is changed and the influences of different fuse materials and connection modes on arc extinguishing time are compared. Through the proposed test method,the arc extinguishing time of single-phase grounding fault under different fault currents and different working conditions can be measured,thus providing a reference for singlephase grounding fault processing device to judge the nature of single-phase grounding fault.
作者
阮琦
薛晨
RUAN Qi;XUE Chen(Guodian Hanchuan Power Generation Co.,Ltd.,Hanchuan Hubei 432000,China)
出处
《湖北电力》
2019年第5期59-64,共6页
Hubei Electric Power
关键词
10kV模拟配电网
不接地系统
单相接地故障
熄弧时间
模拟试验
analog distribution network
non-grounded system
single-phase grounding fault
arc extinguishing time
simulation test
