一种SF_6替代气体—氟碳气体的故障分解气体产生规律及基于分解物气体的故障判据研究
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摘要
氟碳气体(c-C_4F_8)温室效应小,耐电强度高,是一种潜在的SF_6替代气体。使用氟碳气体作为绝缘介质的气体绝缘开关,将成为新一代的环境友好的设备。分解气体分析法通过检测故障产生的气体组分诊断设备故障,是检测电力设备故障的重要方法,某些应用场合具有不可替代的作用,但该方法对于不同的绝缘介质需检测的气体组分不同,故障判据也大不相同。该文通过模拟实验研究了氟碳气体介质在几种常见故障条件下分解生成物产生规律,并初步建立基于分解气体的故障判据;结果显示过热故障主要产生C_2F_4和C_3F_6气体,同时过热温区不同,C_2F_4/C_3F_6比值不同;而放电性故障产生CF_4、C_2F_6、C_2F_4、C_3F_8及C_3F_6,存在明显差别;同时局部放电、火花放电、电弧放电故障下,C_2F_4/CF_4,C_2F_4/C_2F_6及C_3F_6/C_3F_8比值存在明显差别,基于此,提出"动态三比值法"即通过比值变化趋势识别三类放电故障,为监测c-C_4F_8绝缘设备故障提供一种思路。
Fluorocarbon gas c-C_4F_8 is one of the potential substitution candidates for SF_6 because of its low global warming potential(GWP) and high dielectric performance. Gas insulated switchgears using c-C_4F_8 gas mixture will be a new type of environment-friendly device. The decomposition gas analysis method is an important way for fault diagnosis by measuring the decomposition gases generated by electrical fault, which has an irreplaceable role in some situation. However, different criteria are needed for different insulation gases. In this paper, the gas decomposition properties of fluorocarbon were studied by the simulating experiments of four kinds of faults. Accordingly, a fault diagnostic criterion was proposed. The experiment results show the main decomposition gases are C_2F_4,C_3F_6 under overheating fault, and the ratio of C_2F_4/C_3F_6 is different in different overheating temperature zones. Different form the overheating fault, the main decomposition gases under discharges are CF_4, C_2F_6, C_2F_4, C_3F_8 and C_3F_6. Meanwhile, the ratios of C_2F_4/CF_4, C_2F_4/C_2F_6 and C_3F_6/C_3F_8 are quite different for partial discharge, spark discharge and arc discharge. Therefore, a dynamic three-ratio method was proposed to identify three types of discharge faults by ratio variation tendency, which provides a way for monitoring faults of c-C_4F_8 insulation equipment.
Fluorocarbon gas c-C_4F_8 is one of the potential substitution candidates for SF_6 because of its low global warming potential(GWP) and high dielectric performance. Gas insulated switchgears using c-C_4F_8 gas mixture will be a new type of environment-friendly device. The decomposition gas analysis method is an important way for fault diagnosis by measuring the decomposition gases generated by electrical fault, which has an irreplaceable role in some situation. However, different criteria are needed for different insulation gases. In this paper, the gas decomposition properties of fluorocarbon were studied by the simulating experiments of four kinds of faults. Accordingly, a fault diagnostic criterion was proposed. The experiment results show the main decomposition gases are C_2F_4,C_3F_6 under overheating fault, and the ratio of C_2F_4/C_3F_6 is different in different overheating temperature zones. Different form the overheating fault, the main decomposition gases under discharges are CF_4, C_2F_6, C_2F_4, C_3F_8 and C_3F_6. Meanwhile, the ratios of C_2F_4/CF_4, C_2F_4/C_2F_6 and C_3F_6/C_3F_8 are quite different for partial discharge, spark discharge and arc discharge. Therefore, a dynamic three-ratio method was proposed to identify three types of discharge faults by ratio variation tendency, which provides a way for monitoring faults of c-C_4F_8 insulation equipment.
引文
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[9]Zhang Liuchun,Xiao Dengming,Zhang Dong.Applying c-C4F8/CO2 substituting SF6 as insulation medium at low E/N(<400Td)[C]//XVI International Conference on Gas Discharges and Their Applications,Xi’an,2006:749-752.
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[11]Li Kang,Xing Weijun,Zhang Guoqiang,et al.Study on decomposition gas for faults diagnostic of electrical equipment using fluorocarbons[C]//2010International Conference on Power System Technology,Hangzhou,China,2010:1-7.
[12]李康,张国强,邢卫军,等.c_C4F8及其与N2混合绝缘气体在典型故障时分解生成物的试验分析[J].高电压技术,2012,38(4):985-992.Li Kang,Zhang Guoqiang,Xing Weijun,et al.Experiment analysis of decomposition products in typical fault of c-C4F8 gas and insulating gas mixture containing c-C4F8 and N2[J].High Voltage Engineering2012,38(4):985-992.
[13]唐念,乔胜亚,李丽,等.HF和H2S作为气体绝缘组合电器绝缘缺陷诊断特征气体的有效性[J].电工技术学报,2017,32(19):206-215.Tang Nian,Qiao Shengya,Li Li,et al.Validity of HFand H2S as target gases of insulation monitoring in gas insulated switchgear[J].Transactions of China Electrotechnical Society,2017,32(19):206-215.
[14]赵明月,林涛,颜湘莲,等.基于氧同位素示踪法的电晕放电中H2O和O2对SF6分解气体形成的影响[J].电工技术学报,2018,33(20):4722-4728.Zhao Mingyue,Lin Tao,Yan Xianglian,et al.Influence of trace H2O and O2 on SF6 decomposition characteristics under corona discharge based on oxygen isotope tracer[J].Transactions of China Electrotechnical Society,2018,33(20):4722-4728.
[15]乔胜亚,周文俊,王勇,等.典型吸附剂对GIS固体绝缘介质放电特征气体变化规律影响[J].电工技术学报,2018,33(19):4627-4635.Qiao Shengya,Zhou Wenjun,Wang Yong,et al.Effect of typical adsorbents on gas change characteristics of gas insulated switchgear solid insulation dielectric[J].Transactions of China Electrotechnical Society,2018,33(19):4627-4635
[2]张晓星,肖焓艳,黄杨珏.低温等离子体处理SF6废气综述[J].电工技术学报,2016,31(24):16-24.Zhang Xiaoxing,Xiao Hanyan,Huang Yangjue.Areview of degradation of SF6 waste by low temperature plasma[J].Transactions of China Electrotechnical Society,2016,31(24):16-24.
[3]肖焓艳,张晓星,肖淞,等.环境介质对介质阻挡放电降解SF6影响的实验[J].电工技术学报,2017,32(20):20-27.Xiao Hanyan,Zhang Xiaoxing,Xiao Song,et al.Experiment of effects of ambient medium on SF6degradation for a double dielectrica barrier discharge reactor[J].Transactions of China Electrotechnical Society,2017,32(20):20-27.
[4]李鑫涛,林莘,徐建源,等.SF6/N2混合气体电击穿特性仿真及实验[J].电工技术学报,2017,32(20):42-52.Lin Xintao,Lin Xin,Xu Jianyuan,et al.Simulation and experiments of eielectric breakdown characteristics in SF6/N2 gas mixtures[J].Transactions of China Electrotechnical Society,2017,32(20):42-52.
[5]Christophorou L G,Olthoff J K,Green D S.Gases for electrical insulation and arc interruption:possible present and future alternatives to SF6[J].IEEE Power Engineering Review,1998,18(6):10.1109/MTER.1998.123673.
[6]Yamamoto O,Takuma T,Hamada S,et al.Applying a gas mixtures containing c-C4F8 as an insulation medium[J].IEEE Transactions on Dielectrics and Electrical Insulation,2001,8(6):1075-1081.
[7]Hiroaki Y,Osamu T,Yutaka Y,et al.Analysis of discharge voltage in c-C4F8 mixtures with N2[J].Papers of Technical Meeting on Plasma Science and Technology,2000,PST-00(44-53):39-44.
[8]Wu Biantao,Xiao Dengming,Liu Zhangsheng,et al.Analysis of insulation characteristics of c-C4F8 and N2 gas mixtures by monte carlo method[J].Journal of Physics D:Applied Physics,2006,39(19):4204-4207.
[9]Zhang Liuchun,Xiao Dengming,Zhang Dong.Applying c-C4F8/CO2 substituting SF6 as insulation medium at low E/N(<400Td)[C]//XVI International Conference on Gas Discharges and Their Applications,Xi’an,2006:749-752.
[10]Xing Weijun,Li Kang,Zhang Guoqiang,et al.Experimental study on the cooling performances of gas mixtures with fluorocarbon used in gas insulated transmission line[C]//Proceedings of the 13th International Conference on Electrical Machines and Systems(ICEMS2010),Incheon,2010:1469-1472.
[11]Li Kang,Xing Weijun,Zhang Guoqiang,et al.Study on decomposition gas for faults diagnostic of electrical equipment using fluorocarbons[C]//2010International Conference on Power System Technology,Hangzhou,China,2010:1-7.
[12]李康,张国强,邢卫军,等.c_C4F8及其与N2混合绝缘气体在典型故障时分解生成物的试验分析[J].高电压技术,2012,38(4):985-992.Li Kang,Zhang Guoqiang,Xing Weijun,et al.Experiment analysis of decomposition products in typical fault of c-C4F8 gas and insulating gas mixture containing c-C4F8 and N2[J].High Voltage Engineering2012,38(4):985-992.
[13]唐念,乔胜亚,李丽,等.HF和H2S作为气体绝缘组合电器绝缘缺陷诊断特征气体的有效性[J].电工技术学报,2017,32(19):206-215.Tang Nian,Qiao Shengya,Li Li,et al.Validity of HFand H2S as target gases of insulation monitoring in gas insulated switchgear[J].Transactions of China Electrotechnical Society,2017,32(19):206-215.
[14]赵明月,林涛,颜湘莲,等.基于氧同位素示踪法的电晕放电中H2O和O2对SF6分解气体形成的影响[J].电工技术学报,2018,33(20):4722-4728.Zhao Mingyue,Lin Tao,Yan Xianglian,et al.Influence of trace H2O and O2 on SF6 decomposition characteristics under corona discharge based on oxygen isotope tracer[J].Transactions of China Electrotechnical Society,2018,33(20):4722-4728.
[15]乔胜亚,周文俊,王勇,等.典型吸附剂对GIS固体绝缘介质放电特征气体变化规律影响[J].电工技术学报,2018,33(19):4627-4635.Qiao Shengya,Zhou Wenjun,Wang Yong,et al.Effect of typical adsorbents on gas change characteristics of gas insulated switchgear solid insulation dielectric[J].Transactions of China Electrotechnical Society,2018,33(19):4627-4635
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