毛成程,王巨丰,周勇军,孟伟航,韩力.10kV配电网压缩灭弧防雷装置工频续流遮断与雷电冲击实验研究[J].电测与仪表,2022,59(10):38-44. maochengcheng,wangjufeng,zhouyongjun,mengweihang,hanli.Research on power frequency continuous current interruption and lightning impulse of 10 kV distribution network compression arc extinguishing lightning protection device[J].Electrical Measurement & Instrumentation,2022,59(10):38-44.
10kV配电网压缩灭弧防雷装置工频续流遮断与雷电冲击实验研究
Research on power frequency continuous current interruption and lightning impulse of 10 kV distribution network compression arc extinguishing lightning protection device
In view of the fact that the distribution network usually does not set up lightning wires, which is easy to cause flashover and trip when lightning strikes, this paper studies a lightning protection device with arc extinguishing capability applied to 10kV lines. The compressed arc extinguishing device is essentially a kind of parallel gap with arc extinguishing capability. In order to verify its effectiveness, the experiments of interrupting arc extinguishing and lightning impulse discharge are carried out respectively. The experimental results show that the device can extinguish the arc within 4ms and achieve the effect of restraining reignition. Through the lightning impulse test, the V-s characteristic curve of the device with the gap length of 5, 7 and 9 cm under the post insulator with the dry arc length of 22.5 cm is obtained, and the V-s characteristic curve is analyzed. Finally, the gap length suitable for this kind of insulator is not more than 7.4 cm, which provides theoretical guidance for the future engineering installation.
