低气压电晕放电电流特性理论与试验研究

Theory and Experiment for Characteristics of Corona Discharge Current under Low Atmospheric Pressure

为了解低气压环境下的电晕放电电流特性,对放电电流进行理论研究和仿真计算,并建立了由气压泵、气压计、密闭气罐、高压静电源、动态电位测试仪等组成的低气压电晕放电模拟试验系统。利用针-板电极结构模型,进行了低气压环境下的针-板电晕放电试验,并结合气体放电理论,从微观粒子运动方面对试验结果进行分析。研究结果表明:随着气压的降低,放电电流脉冲上升沿时间和电流脉冲重复频率逐渐增大,但下降沿和脉冲持续时间基本不变。

In order to research the corona discharge characteristics under high-altitude low atmospheric pressure,the theory and simulation for corona discharge current was studied,then the low atmospheric pressure discharge test system was established,consisting of pneumatic pump,barometer,sealed tank,high voltage static power,dynamic potential tester. Using the needle-plate electrode structure model,the needle-plate corona discharge under low pressure environment was tested in this system,the test results were analysed combining the gas discharge theory from the microscopic particles sports. The results show that: with the reduction of atmospheric pressure,the discharge current pulse rise time and current pulse repetition frequency gradually increased while the duration of pulse and the falling edge essentially unchanged.