高电压技术2017，Vol.43Issue(3)：736-742,7.DOI:10.13336/j.1003-6520.hve.20170303007
温度变化对SF6/N2混合气体放电特性的影响
Effect of Temperature Variation on Discharge Characteristics of SF6/N2 Gas Mixtures
摘要
Abstract
The ions mean free path and the thermal motion speeds are different at different temperatures around SF6/N2 mixed gas,thus SF6/N2 mixed gas discharge exhibits a different characteristics.Therefore,under the severe non-uniform electric field and lightning impulse voltage,we studied the breakdown characteristics of SF6/N2 mixed gas along with the temperature change.Moreover,under the positive and negative polarity of lightning impulse voltage,we measured the impulse breakdown voltage and pre-discharge current waveforms,and analyzed the pre-discharge phenomenon,stepping time,corona onset electric field,and breakdown strength in SF6/N2 mixed gas at different temperatures.The temperature range during experiment was set from-20 ℃ to 20 ℃.Results show that the stepping time,corona onset electric field strength,and breakdown field strength present great randomness.The stepping time under negative polarity impulse voltage is longer than that under positive polarity impulse voltage.Under the negative polarity impulse voltage,as the temperature increases,the corona onset electric field and the breakdown strength of 10％SF6-90％N2 mixed gas will increase.The results are of certain research significance in the design of cubicle gas insulated switchgear and gas insulated metal-enclosed transmission line.关键词
冲击电压/电晕起始场强/击穿场强/SF6/N2混合气体/步长时间/温度变化Key words
impulse voltage/corona onset electric field strength/breakdown strength/SF6/N2 gas mixtures/stepping time/temperature change引用本文复制引用
李峰,张潇,张周胜..温度变化对SF6/N2混合气体放电特性的影响[J].高电压技术,2017,43(3):736-742,7.基金项目
上海绿色能源并网工程技术研究中心项目(13DZ2251900).Project supported by Shanghai Engineering Research Center of Green Energy Grid-Connected Technology (13DZ2251900). （13DZ2251900）
