单一环境应力条件下短空气间隙放电特性实验研究

Air Gap Discharge Characteristics under Single Environmental Stress Condition

空气间隙放电是研究雷电屏蔽问题最有效的手段之一。对于短间隙棒-板放电电压U_(50)受气压、湿度及温度等环境影响的研究较少。但青藏高原等高海拔地区的低气压和南方地区的高湿度都会对短间隙棒-板的放电电压产生更大的影响。为此,以短间隙棒-板为研究对象,在步入式高海拔环境试验箱和三综合试验系统中展开低气压和不同温湿度条件下短间隙棒-板正极性雷电冲击放电特性试验,并分析了气压、相对湿度,温度对其放电特性的影响。研究表明:短间隙棒-板受海拔的影响比较明显,受温湿度的影响较弱。

Air gap discharge is one of the most effective methods to study lightning shielding. At present,there are few studies about the influence of air pressure,humidity and temperature on short gap rod plate discharge voltage U_(50). However,the low pressure in high altitude areas such as the Qinghai Tibet Plateau and the high humidity in the South will have a greater impact on the discharge voltage of short rod plate gap. Therefore,this paper takes short gap rod plate as the research object,conducts the short gap rod plate positive lightning impulse discharge characteristic test under the conditions of low air pressure and different temperatures and humidity in the walk-in high altitude environment test chamber and three comprehensive test systems,and analyzes the influence of air pressure,relative humidity and temperature on its discharge characteristics. The results show that the influence of altitude on short gap rod plate is obvious,and the influence of temperature and humidity is weak.