湿度对负极性直流导线起晕电压和离子流场的影响

Effect of Humidity on Corona Onset Voltage and Ion Flow Field of Negative DC Wires

为了研究湿度对负极性直流导线起晕电压和离子流场的影响,在温湿度可控的人工气候室内,使用直径1 mm、3 mm和5 mm的光滑不锈钢导线,搭建了同轴圆柱电晕放电实验平台。实验同时测量了电晕笼壁处的电场强度和离子流密度。实验结果表明:随着相对湿度增加,直径1 mm导线起晕电压整体呈先上升后下降趋势;直径3 mm和5 mm导线起晕电压整体呈上升趋势。离子流密度随相对湿度的增加而降低;电场强度随相对湿度的增加呈先减小后增大的趋势。

In order to study the effect of humidity on the corona onset voltage and ion flow field of Negative DC Wires,a platform using the coaxial cylinder electrode was built in an artificial climate chamber where the temperature and humidity could be controlled,using stainless steel wires of 1 mm,3 mm and 5 mm diameter respectively.The electric field intensity and ion current density are measured.The experimental results show that with the increase of relative humidity,the corona onset voltage of 1 mm diameter wire increases first and then decreases,the corona onset voltage of 3 mm and 5 mm diameter wire is increasing.The ion flow density decreases with relative humidity increasing,the electric field strength tends to decrease and then increase with increasing relative humidity.