雾对棒-板空气间隙交流放电特性的影响  

Influence of Fog on AC Discharge Characteristics of Rod-plane Air Gaps

作　　者：董冰冰[1] 蒋兴良[1] 黄俊[1] 郭裕钧 黎振宇[1] 舒立春[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030

出　　处：《高电压技术》2014年第5期1339-1344,共6页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724501/502/503);国家创新研究群体基金(51021005)~~

摘　　要：目前有关雾中棒-板空气间隙交流放电特性的研究较少。为此,在人工气候室内利用超声波雾发生器对不同湿润条件和雾环境下的棒-板空气间隙交流放电进行多次试验,得到了雾水质量浓度、电导率和温度对不同棒-板空气间隙距离（5、10、15 cm）交流放电电压的影响规律;并在综合考虑雾水质量浓度、电导率影响的基础上,得到了该放电电压的计算式。结果表明,棒-板空气间隙的雾中交流放电电压比其在干闪下有所增加,5、10、15cm间隙的击穿电压比干闪时增加了3.1%～4.7%;随着雾水质量浓度的增加（1～4 g/m3）,放电电压先上升后下降,且在3 g/m3时达到最大;此外,相比雾水电导率为100μS/cm的情况,雾水电导率为5 150μS/cm时的间隙击穿电压在雾水质量浓度为1、2、3、4 g/m3时分别降低了2.70%、2.72%、4.99%、9.07%。利用所提出的计算式得到的结果与试验结果的偏差〈7.3%。Currently, few researches on AC discharge characteristics of rod-plane air gap（RPAG） under fog conditions are reported. To this end, we experimentally investigated the AC discharge in RPAG in fog environment of various humid conditions in artificial climate chamber using an ultrasound fog generator. The influences of water content in fog, conductivity and temperature on the AC discharge in three RPAGs（5, 10, 15 cm） were obtained. Then with a comprehensive consideration of the effects of water content in fog and conductivity, a formula of discharge voltage was deduced. The results show that the AC discharge voltage of RPAG in fog is higher than the voltage of dry flashover, and the break voltages of 5, 10, 15 cm gaps are higher than those under dry condition by 3.1%～4.7%. With increasing water content in fog within 1～4 g/m3, the discharge voltage increases first until the content reaches 3 g/m3 and then it decreases. Moreover, compared those in fog of 100 μS/cm water drops, the gap-break voltages in fog of 5 150 μS/cm water drops decrease by 2.70%, 2.72%, 4.99%, and 9.07% when the water contents in fog are 1, 2, 3, and 4 g/m3, respectively. The deviations between the test results and the calculation results obtained by the proposed correction formula are less than 7.3%.

关 键 词：雾 棒-板 空气间隙 交流 放电特性 击穿电压 

分 类 号：TM852[电气工程—高电压与绝缘技术]