10 kV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

针对配电网络通常不架设避雷线，雷击时极易引起闪络跳闸的情况，本文研究了一种应用于10kV线路的具备灭弧能力的防雷装置。压缩灭弧装置本质上是一种带有灭弧能力的并联间隙，为验证其有效性，对其分别进行了遮断灭弧实验以及雷电冲击放电实验，实验结果表明：该装置能在4ms内熄灭电弧且能达到抑制重燃的效果；通过雷电冲击实验得到了该装置在干弧长度为22.5cm的支柱绝缘子下的间隙长度为5、7、9cm的伏秒特性曲线，分析其伏秒特性曲线，最终得出适合此类绝缘子的间隙长度是不超过7.4cm，为日后的工程安装提供理论指导。

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.