冲击电压下CF_3I/CO_2混合气体间隙的绝缘特性与极性效应
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摘要
广泛应用于电力系统的SF_6气体是一种强温室效应气体,寻找新型环保型替代气体成为电力行业亟待解决的问题。为此文中对体积比为3:7的CF_3I/CO_2混合气体进行了实验研究,测量了雷电冲击电压下CF_3I混合气体的50%击穿电压,并和纯SF_6气体的绝缘性能进行了比较。结果表明:CF_3I/CO_2具有较好的绝缘能力,在稍不均匀电场下可以达到SF_6气体绝缘强度的0.84倍,在极不均匀场下也可以达到SF_6气体的0.65倍。还对CF_3I/CO_2混合气体的极性效应进行了分析,结果显示极不均匀场下的CF_3I混合气体极性效应更加明显,并且还出现了极性反转现象。
SF_6 gas has been widely used in power system, however, it has a strong greenhouse effect. Looking for new environmentally friendly alternative gas becomes an urgent task for the power industry. Therefore, we experimentally investigated the CF_3I/CO_2 gas mixture with a mixing ratio of 3:7. The 50% breakdown voltage of the CF_3I gas mixture under lightning impulse was measured and compared with pure SF_6 gas. The results show that the CF_3I/CO_2 mixture has good insulation properties, its insulation strength can reach 0.84 times of SF_6 gas under slightly uneven electrical field, and 0.65 times of SF_6 gas in extremely inhomogeneous electrical field. The polarity effect of the CF_3I/CO_2 gas mixture was also analyzed. The results show that the polarity effect of the CF_3I gas mixture in extremely inhomogeneous electrical field is more obvious, and the phenomenon of polarity reversal occurs.
SF_6 gas has been widely used in power system, however, it has a strong greenhouse effect. Looking for new environmentally friendly alternative gas becomes an urgent task for the power industry. Therefore, we experimentally investigated the CF_3I/CO_2 gas mixture with a mixing ratio of 3:7. The 50% breakdown voltage of the CF_3I gas mixture under lightning impulse was measured and compared with pure SF_6 gas. The results show that the CF_3I/CO_2 mixture has good insulation properties, its insulation strength can reach 0.84 times of SF_6 gas under slightly uneven electrical field, and 0.65 times of SF_6 gas in extremely inhomogeneous electrical field. The polarity effect of the CF_3I/CO_2 gas mixture was also analyzed. The results show that the polarity effect of the CF_3I gas mixture in extremely inhomogeneous electrical field is more obvious, and the phenomenon of polarity reversal occurs.
引文
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[18]TOYOTA H,MATSUOKA S,HIDAKA K,et al.Measurement of sparkover voltage and time lag characteristics in CF3I-N2 and CF3I-Air gas mixtures by using steep-front square voltage[J].Electrical Engineering in Japan,2006,15(2):1-7.
[19]KATAGIRI H,KASUYA H,MIZOGUCHI H,et al.Investigation of the performance of CF3I gas as a possible substitute for SF6[J].IEEETransactions on Dielectrics and Electrical Insulation,2008,15(5):1424-1429.
[20]张晓星,周君杰,唐炬,等.CF3I-CO2混合气体在针板电极下局部放电绝缘特性实验研究[J].电工技术学报,2013,28(1):36-42.ZHANG Xiaoxing,ZHOU Junjie,TANG Ju,et al.Experimental study of partial discharge insulating properties for CF3I-CO2 mixtures under needle-plate electrode[J].Transaction of China Electrotechnical Society,2013,28(1):36-42.
[21]IEC standard for high-voltage test techniques-part 1:general definitions and test requirements:IEC 60060-1:2010[S],2010.
[2]CHRISTOPHOROU L G,OLTHOFF J K,VAN BRUNT R J,et al.Sulfur hexafluoride and the electric power industry[J].IEEE Electrical Insulation Magazine,1997,13(5):20-24.
[3]肖登明,阎究敦.气体绝缘输电线路(GIL)的应用及发展[J].高电压技术,2017,43(3):699-707.XIAO Dengming,YAN Jiudun.Application and development of gas insulated transmission line(GIL)[J].High Voltage Engineering,2017,43(3):699-707.
[4]邓云坤,肖登明,陈炯.CF3I-N2混合气体作为SF6替代气体用于GIS/C-GIS的绝缘性能分析[J].高电压技术,2013,39(9):2288-2293.DENG Yunkun,XIAO Dengming,CHEN Jiong.Insulation performance of CF3I-N2 gas mixtures as alternative for SF6 in GIS/C-GIS[J].High Voltage Engineering,2013,39(9):2288-2293.
[5]CHRISTOPHOROU L G,VAN BRUNT R J.SF6/N2 mixtures basic and HV insulation properties[J].IEEE Transactions on Dielectrics and Electrical Insulation,1995,2(5):852-1003.
[6]WIDGER P.Investigation into CF3I-CO2 gas mixtures for insulation of gas-insulated distribution equipment[D].Wales,UK:Cardiff University,2014.
[7]WIDGER P,HADDAD A,GRIFFITHS H.Breakdown performance of vacuum circuit breakers using alternative CF3I-CO2 insulation gas mixture[J].IEEE Transactions on Dielectrics and Electrical Insulation,2016,23(1):14-21.
[8]满林坤,邓云坤,肖登明.c-C4F8/N2与c-C4F8/CO2混合气体的绝缘性能[J].高电压技术,2017,43(3):788-795.MAN Linkun,DENG Yunkun,XIAO Dengming.Insulating properties of c-C4F8/N2 and c-C4F8/CO2 mixtures[J].High Voltage Engineering,2017,43(3):788-795.
[9]张刘春,肖登明,张栋,等.C-C4F8/CF4替代SF6可行性的SST实验分析[J].电工技术学报,2008,23(6):14-18.ZHANG Liuchun,XIAO Dengming,ZHANG Dong,et al.SST experimental analysis on the feasibility of c-C4F8/CF4 substituting SF6 as insulation medium[J].Transactions of China Electrotechnical Society,2008,23(6):14-18.
[10]邓云坤,马仪,陈先富,等.CF3I-N2混合气体在稍不均匀和极不均匀电场中的工频击穿特性[J].高电压技术,2017,43(3):772-779.DENG Yunkun,MA Yi,CHEN Xianfu,et al.AC breakdown characteristics of CF3I-N2 gas mixtures in condition of quasi-homogeneous and extremely non-uniform electric field[J].High Voltage Engineering,2017,43(3):754-764.
[11]赵虎,李兴文,贾申利.300 K下不同比例CF3I-N2和CF3I-CO2混合气体绝缘特性的计算分析[J].高电压技术,2013,39(7):1692-1697.ZHAO Hu,LI Xingwen,JIA Shenli.Calculation of the insulation properties of different CF3I-N2 and CF3I-CO2 mixtures at 300 K[J].High Voltage Engineering,2013,39(7):1692-1697.
[12]焦俊韬,肖登明,赵谡,等.低比例CF3I的CF3I-CO2混合气体在极不均匀电场中的绝缘特性[J].高电压技术,2017,43(3):772-779.JIAO Juntao,XIAO Dengming,ZHAO Su,et al.Insulation characteristics for CF3I-CO2 gas mixtures with low proportion of CF3I in extreme non-uniform electric field[J].High Voltage Engineering,2017,43(3):772-779.
[13]张晓星,周君杰,唐炬,等.CF3I/N2混合气体局部放电特性实验研究[J].高电压技术,2013,39(2):287-293.ZHANG Xiaoxing,ZHOU Junjie,TANG Ju,et al.Experimental study of partial discharge properties for CF3I/N2 mixtures[J].High Voltage Engineering,2013,39(2):287-293.
[14]DENG Y K,XIAO D M.The effective ionization coefficients and electron drift velocities in gas mixtures of CF3I with N2 and CO2 obtained from Boltzmann equation analysis[J].Chinese Physics B,2013,22(3):035101.
[15]DENG Y,XIAO D.Analysis of the insulation characteristics of CF3Igas mixtures with Ar,Xe,He,N2,and CO2 using Boltzmann equation method[J].Japanese Journal of Applied Physics,2014,53(9):096201.
[16]NAKAYAMA N,ELIZABETH E F,DENISE R O,et al.Surface chemistry and radiation chemistry of CF3I on Mo(110)[J].Journal of Physical Chemistry,2004,108(13):4080-4085.
[17]DUAN Y Y,ZHU M S,HAN L Z,et al.Experimental vapor pressure data and a vapor pressure equation for trifluoroidomethane[J].Fluid Phase Equilibria,1996,121(1):227-234.
[18]TOYOTA H,MATSUOKA S,HIDAKA K,et al.Measurement of sparkover voltage and time lag characteristics in CF3I-N2 and CF3I-Air gas mixtures by using steep-front square voltage[J].Electrical Engineering in Japan,2006,15(2):1-7.
[19]KATAGIRI H,KASUYA H,MIZOGUCHI H,et al.Investigation of the performance of CF3I gas as a possible substitute for SF6[J].IEEETransactions on Dielectrics and Electrical Insulation,2008,15(5):1424-1429.
[20]张晓星,周君杰,唐炬,等.CF3I-CO2混合气体在针板电极下局部放电绝缘特性实验研究[J].电工技术学报,2013,28(1):36-42.ZHANG Xiaoxing,ZHOU Junjie,TANG Ju,et al.Experimental study of partial discharge insulating properties for CF3I-CO2 mixtures under needle-plate electrode[J].Transaction of China Electrotechnical Society,2013,28(1):36-42.
[21]IEC standard for high-voltage test techniques-part 1:general definitions and test requirements:IEC 60060-1:2010[S],2010.