湿度对悬浮液滴荷电特性及离子流场特性的影响  

Influence of Humidity on the Charge Characteristics of Suspension Droplets and the Characteristics of Ion Flow Field

作　　者：申南轩 苏子寒 张远航 卢铁兵 Shen Nanxuan;Su Zihan;Zhang Yuanhang;Lu Tiebing(State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University,Beijing 102206 China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京102206

出　　处：《电工技术学报》2022年第13期3422-3430,3452,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(52077074)。

摘　　要：为了明确湿度对高压直流导线离子流场的影响,在人工气候室中使用同轴圆柱电极电晕放电实验平台对不同湿度条件下正极性高压直流导线的离子流场进行测量,分析湿度对正极性导线离子流场的影响规律,通过引入用于表征悬浮液滴荷电能力大小的参数,计算不同湿度条件下悬浮液滴的荷电特性和电场分量。计算结果表明:相对湿度小于60%和大于等于60%环境下离子流场中悬浮液滴荷电特性不同,相对湿度小于60%时,悬浮液滴荷电能力较弱且几乎不随湿度发生变化,空间电荷以离子为主,荷电液滴对离子流场影响较小,导线电晕放电特性和离子迁移率随湿度变化是影响离子流场的主要因素;相对湿度大于等于60%时,悬浮液滴荷电能力随湿度线性增大,悬浮液滴空间电荷密度迅速增加,荷电悬浮液滴成为影响离子流场的主要因素之一。In order to define the influence mechanism of humidity on the ion flow field of HVDC conductor, the positive ion flow field of HVDC conductor under different humidity was measured by using the coaxial cylindrical electrode in the artificial climate chamber, and the influence of humidity on the ion flow field was analyzed. By introducing the charging parameter, which is used to characterize the charge capacity of suspension droplets, the charge characteristics of suspension droplets and electric field components under different humidity were calculated. The calculation results show that the charge characteristics of the suspension droplets in the ion flow field are different when the relative humidity is less and more than 60%. When the relative humidity is less than 60%, the charge capacity of suspension droplets is poor and almost does not change with the humidity, the space charge is mainly ions and charged droplets have less effect on the ion flow field, the corona discharge characteristics and ion mobility change with humidity are the main factors affecting the ion flow field. When the relative humidity is more than 60%, the charge capacity of suspension droplets increases linearly with the humidity, and the space charge density of the suspension droplets increases rapidly, which becomes one of the main factors affecting the ion flow field.

关 键 词：湿度 悬浮液滴 荷电特性 离子流场 影响因素 

分 类 号：TM851[电气工程—高电压与绝缘技术]