基于迁移管法气压对氮气正电晕放电离子迁移率的影响
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摘要
低气压下离子迁移率是高海拔地区输电线路导线电晕放电的关键参数之一,同时氮气作为正电晕放电参与反应的主要气体,目前均作为常量对待,其测量结果对于建立考虑海拔因素的离子流、电晕损失等计算模型具有重要意义,因此对不同气压下氮气正离子迁移率的测量显得尤为重要。在已有研究的基础上,自主设计了可模拟不同氮气气压条件下离子迁移率测量平台,并将离子门的动作方式由关闭—导通—关闭改进为关闭—导通,从而得到幅值尽可能大的离子流波形。利用此平台测量得到大气条件下纯氮气环境离子的迁移率为1.113cm2V-1S-1,并通过试验研究了气压在101.19~44.52k Pa范围内氮气环境离子迁移率变化情况,研究发现氮气正离子迁移率随气压增大呈非线性减小且具有一定的饱和趋势,最后提出了一种氮气正离子迁移率随气压变化的指数修正方法。
The ion mobility in low gas pressure is a key parameter for corona discharge of power transmission line in high altitude area. Meanwhile, nitrogen as the main reaction gas in positive corona discharge, its existing value of the ion mobility takes no consideration of gas pressure. Actually, the measurements of ion mobility in different gas pressures have great significance to establish the ion current and corona loss calculation models. A needle-ring corona discharge experiment platform is designed and set up, which can simulate different gas pressures. What's more, the execution of the ion gate is improved from off-on-off to off-on, thus the waveforms with higher amplitudes of the ion could be gained. Thanks to the designed platform, the measured ion mobility of pure nitrogen under normal atmospheric condition is 1.113cm2V-1S-1. Besides, the positive nitrogen ion mobility at gas pressure of 101.19~44.52 k Pa is measured. The experimental results indicate that the ion mobility decreases nonlinearly with the increasing of gas pressure and has a certain trend of saturation. Finally, an index correction method is put forward.
The ion mobility in low gas pressure is a key parameter for corona discharge of power transmission line in high altitude area. Meanwhile, nitrogen as the main reaction gas in positive corona discharge, its existing value of the ion mobility takes no consideration of gas pressure. Actually, the measurements of ion mobility in different gas pressures have great significance to establish the ion current and corona loss calculation models. A needle-ring corona discharge experiment platform is designed and set up, which can simulate different gas pressures. What's more, the execution of the ion gate is improved from off-on-off to off-on, thus the waveforms with higher amplitudes of the ion could be gained. Thanks to the designed platform, the measured ion mobility of pure nitrogen under normal atmospheric condition is 1.113cm2V-1S-1. Besides, the positive nitrogen ion mobility at gas pressure of 101.19~44.52 k Pa is measured. The experimental results indicate that the ion mobility decreases nonlinearly with the increasing of gas pressure and has a certain trend of saturation. Finally, an index correction method is put forward.
引文
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[18]汪沨,李锰,潘雄峰,等.基于FEM-FCT算法的SF6/N2混合气体中棒-板间隙电晕放电特性的仿真研究[J].电工技术学报,2013,28(9):261-267.Wang Feng,Li Meng,Pan Xiongfeng,et al.Corona discharge simulations of rod-plate gap in SF6/N2 gas mixtures using FEM-FCT method[J].Transactions of China Electrotechnical Society,2013,28(9):261-267.
[19]范欣然.用于离子迁移率谱仪的瞬态漂移电场研究[D].北京:中国科学院,2007.
[20]胡树植.离子迁移率谱仪(IMS)及其应用[J].核电子学与探测技术,1998,18(1):5-11.Hu Shuzhi.Ion mobility spectrometry and its application[J].Nuclear Electronics and Detection Technology,1998,18(1):5-11.
[21]Tabrizchi M,Rouholahnejad F.Corona discharge ion mobility spectrometry at reduced pressures[J].Review of Scientific Instruments,2004,75(11):4656-4661.
[2]Eiceman G A,Karpas Z.Ion mobility spectrometry[M].New York:Journal of the American Society for Mass Spectrometry,1994.
[3]Mason E A,Mc Daniel E W,Transport properties of ions in gases[M].New York:John Wiley&Sons,1987.
[4]徐学基,诸定昌.气体放电[M].上海:复旦大学出版社,1995.
[5]Prestion J M,Rajadhyax L.Effect of ion molecule reactions on ion mobilities[J].Analytical Chemistry,1988,60(1):31-34.
[6]Kanu A B,Dwivedi P,Tam M,et al.Ion mobilitymass spectrometry[J].Journal of Mass Spectrometry,2008,43(1):1-22.
[7]Arce L,Menendez M,Garrido-Delgado R,et al.Sample-introduction systems coupled to ion-mobility spectrometry equipment for determining compounds present in gaseous,liquid and solid samples[J].Trac Trends in Analytical Chemistry,2008,27(2):139-149.
[8]邵士勇,蔺瑞峰,侯可勇,等.离子迁移谱仪的研究进展[J].现代科学仪器,2004,12(4):9-12.Shao Shiyong,Lin Ruifeng,Hou Keyong,et al.Development of the ion mobility spectrometers[J].Modern Scientific Instruments,2004,12(4):9-12.
[9]刘欣.用于离子迁移色谱仪的负电晕放电电子源的研究[D].武汉:华中科技大学,2012.
[10]时迎国,姚琏,李安林,等.离子门参数对真空紫外光电离-大气压离子迁移谱仪性能的影响[J].质谱学报,2007,28(1):1-4.Shi Yingguo,Yao Lian,Li Anlin,et al.The parameters of ion gate on the performance of a VUV ionization-atmospheric pressure ion mobility spectrometer[J].Journal of Chinese Mass Spectrometry Society,2007,28(1):1-4.
[11]檀景辉.基于脉冲正电晕放电离子源的离子迁移谱仪研究[D].天津:天津大学,2010.
[12]Kim S H,Betty K R,Karasek F W.Mobility behavior and composition of hydrated positive reactant ions in plasma chromatography with nitrogen carrier gas[J].Analytical Chemistry,1978,50(14):2006-2016.
[13]刘升,黄超群,沈成银.非对称离子门控制方法和对离子迁移谱分辨率的改善[J].光谱学与光盘分析,2013,33(11):2881-2885.Liu Sheng,Huang Chaoqun,Shen Chengyin.Asymmetric control method for ion shutter and the resolution improvement of ion mobility spectrum[J].Spectroscopy and Spectral Analysis,2013,33(11):2881-2885.
[14]Eiceman G A,Nazarov E G,Rodriguez J E.Analysis of a drift tube at ambient pressure:models and precise measurements in ion mobility spectrometry[J].Review of Scientific Instruments,2001,72(9):3610-3621.
[15]欧阳吉庭,张子亮,彭祖林,等.空气针尖负电晕放电的特征辐射谱[J].高电压技术,2012,38(9):2237-2241.Ouyang Jiting,Zhang Ziliang,Peng Zulin,et al.Electromagnetic radiation from negative corona discharge in air[J].High Voltage Engineering,2012,38(9):2237-2241.
[16]王艳辉,王德真.介质阻挡均匀大气压氮气放电特性研究[J].物理学报,2006,55(11):5923-5930.Wang Yanhui,Wang Dezhen.Characteristics of dielectric barrier homogenous discharge atmospheric pressure in nitrogen[J].Acta Physica Sinica,2006,55(11):5923-5930.
[17]袁海燕,傅正财.基于有限元法的±800k V特高压直流输电线路离子流场计算[J].电工技术学报,2010,25(2):139-146.Yuan Haiyan,Fu Zhengcai.Corona ionized field analysis of±800k V HVDC transmission lines[J].Transactions of China Electrotechnical Society,2010,25(2):139-146.
[18]汪沨,李锰,潘雄峰,等.基于FEM-FCT算法的SF6/N2混合气体中棒-板间隙电晕放电特性的仿真研究[J].电工技术学报,2013,28(9):261-267.Wang Feng,Li Meng,Pan Xiongfeng,et al.Corona discharge simulations of rod-plate gap in SF6/N2 gas mixtures using FEM-FCT method[J].Transactions of China Electrotechnical Society,2013,28(9):261-267.
[19]范欣然.用于离子迁移率谱仪的瞬态漂移电场研究[D].北京:中国科学院,2007.
[20]胡树植.离子迁移率谱仪(IMS)及其应用[J].核电子学与探测技术,1998,18(1):5-11.Hu Shuzhi.Ion mobility spectrometry and its application[J].Nuclear Electronics and Detection Technology,1998,18(1):5-11.
[21]Tabrizchi M,Rouholahnejad F.Corona discharge ion mobility spectrometry at reduced pressures[J].Review of Scientific Instruments,2004,75(11):4656-4661.