带绝缘管并联间隙雷电放电特性研究

Study on Lightning Discharge Characteristics of Parallel Gap with Insulated Tube

并联间隙为一种简单、有效的雷电保护装置,但其击穿时间长且具有分散性,不利于快速泄放雷电流。因此,在并联间隙的下电极上加装了带通孔的绝缘管,以达到缩短并联间隙初始击穿时间的目的。COMSOL仿真与对比试验结果表明,加装绝缘管可减少并联间隙的初始击穿时间,并降低初始击穿电压。

The parallel gap is a simple and effective lightning protection device.But its long breakdown time is dispersed,which is not conducive to rapid discharge of lightning current.Therefore,an insulated pipe with a through hole is added to the lower electrode of the parallel gap to shorten the initial breakdown time of the parallel gap.The COMSOL simulation and comparison test was carried out.The results show that the addition of insulated pipes can reduce the initial breakdown time of the parallel gap and the initial breakdown voltage.