低气压下长间隙工频放电试验平台研究

摘要

To research the characteristics of AC discharge under extreme high altitude , low pressure conditions , this research built up a test platform to simulate AC discharge of long gaps under low pressure and tested its gas tightness and discharge performance .This platform is consisted of a vacuum test chamber , vacuum pump , vacuum gauge, AC power source, high-speed camera, etc.;pressure and gap length are adjustable within 23 Pa~100 kPa and 600 mm respectively .The results show that , this platform meets the requirements for simulating AC discharge of long gaps in 20 km and above altitude , and has good gas tightness and discharge performance for the research of AC discharge characteristics which test period is short .These results have reference value for researching the char-acteristics of AC discharge of long gaps under low pressure .%为研究极高海拔低气压下工频放电特性，搭建了包括真空试验腔、真空泵、真空计、工频电源、高速摄像机等仪器的低气压长间隙工频放电试验平台，并对其气密性和放电性能进行测试。该平台可实现23 Pa～100 kPa范围内气压调节和600 mm以内放电间隙调节。测试结果表明：试验平台能够模拟海拔20 km以上的长间隙工频放电，且对于试验周期较短的工频放电特性研究具有良好的气密性和放电性能。研究成果对高海拔低气压下长间隙放电特性研究具有重要参考价值。