[1]钟建英,王志刚,张 博,等.热态SF6/N2混合气体击穿特性研究[J].高压电器,2020,56(07):8-14.[doi:10.13296/j.1001-1609.hva.2020.07.002]
 ZHONG Jianying,WANG Zhigang,ZHANG Bo,et al.Research on Breakdown Properties of Hot SF6/N2 Mixed Gas[J].High Voltage Apparatus,2020,56(07):8-14.[doi:10.13296/j.1001-1609.hva.2020.07.002]
点击复制

热态SF6/N2混合气体击穿特性研究()
分享到:

《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第56卷
期数:
2020年07期
页码:
8-14
栏目:
SF6替代气体研究
出版日期:
2020-07-20

文章信息/Info

Title:
Research on Breakdown Properties of Hot SF6/N2 Mixed Gas
作者:
钟建英12 王志刚1 张 博2 庚振新2 林 莘2
(1. 平高集团有限公司, 河南 平顶山 467001; 2. 沈阳工业大学电气工程学院, 沈阳 110870)
Author(s):
ZHONG Jianying12 WANG Zhigang1 ZHANG Bo2 GENG Zhenxin2 LIN Xin2
(1. Pinggao Group Co., Ltd., Henan Pingdingshan 467001, China; 2. School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China)
关键词:
热态SF6/N2混合气体 粒子组分 玻尔兹曼方程 折合击穿场强
Keywords:
hot SF6/N2 mixed gas particle composition Boltzmann equation equivalent breakdown field strength
DOI:
10.13296/j.1001-1609.hva.2020.07.002
摘要:
研究了热态SF6/N2混合气体的电击穿特性。在局部热力学和化学平衡假设下,采用质量作用定律法,计算压强0.01~2.00 MPa、温度300~4 000 K范围内的SF6/N2电弧等离子体各组分的摩尔分数,分析电弧熄灭过程热态SF6/N2电弧等离子体各粒子组分随温度和压强的变化过程。采用两项近似方法求解玻尔兹曼方程,得到了不同折合电场下热态SF6/N2混合气体的电子能量分布函数,分析不同碰撞过程中各微观粒子的折合电离系数和折合吸附系数,得到了热态SF6/N2混合气体的折合击穿场强(E/N)cr。研究表明:SF6/N2混合气体的折合击穿场强(E/N)cr随着电弧等离子体温度的降低而增大,其增大的速率主要与混合气体中SF6的分解复合特性有关,增大气压可有效抑制SF6在高温下的分解速度,加速电弧等离子体各粒子的复合过程,从而提高SF6/N2混合气体的(E/N)cr;40%SF6/60%N2和30%SF6/70%N2混合气体在2 000 ~3 500 K高温范围内的(E/N)cr分别至少高出相同条件下纯SF6 3 Td和6 Td;2 000 K温度以下,随着SF6的大量复合,混合气体折合击穿场强(E/N)cr快速增强,SF6含量越多增强速率越大,但仍低于相同条件下纯SF6的(E/N)cr。研究结果可为解决高压SF6/N2混合气体断路器弧后重击穿导致开断失败等问题奠定理论基础。
Abstract:
In this paper, the electrical breakdown characteristics of hot SF6/N2 mixed gas are studied. Under the assumption of local thermodynamics and chemical equilibrium, the mass action law is used to calculate the mole fraction of each component of the SF6/N2 arc plasma with a pressure of 0.01~2.0 MPa and a temperature of 300~4 000 K, and analyze the hot state SF6/N2 arc variation process of plasma particle composition with temperature and pressure. Two approximate methods are used to solve the Boltzmann equation, and the electron energy distribution function of the hot SF6/N2 mixed gas under different electric fields is obtained. The reduced ionization coefficient and reduced adsorption coefficient of each microscopic particle during different collisions are analyzed, and the equivalent breakdown field strength (E/N)cr of the hot SF6/N2 mixed gas is obtained. The research shows that the equivalent breakdown field strength (E/N)cr of the SF6/N2 mixed gas increases with the decrease of the arc plasma temperature, and its increase rate is mainly related to the decomposition and recombination characteristics of SF6 in the mixed gas. Atmospheric pressure can effectively suppress the decomposition rate of SF6 at high temperature, accelerate the recombination process of each particle of the arc plasma, thereby improving the (E/N)cr of the SF6/N2 mixed gas; 40%SF6/60%N2 and 30%SF6/70%N2 the (E/N)cr of the N2 mixed gas in the high temperature range of 2 000~3 500 K is at least higher than that of pure SF6 3 Td and 6 Td under the same conditions; below 2 000 K temperature, with the large amount of SF6 recombination, the mixed gas is equivalent to the breakdown field strength (E/N)cr increases rapidly. The more SF6 content, the greater the enhancement rate, but it is still lower than the (E/N)cr of pure SF6 under the same conditions. The results of the study can lay a theoretical foundation for solving the problems of high-voltage SF6/N2 mixed gas circuit breaker breaking failure caused by restriking after arcing.

参考文献/References:

[1] 林 莘. 现代高压电器技术[M]. 北京:机械工业出版社, 2011.
LIN Xin. The modern high voltage electrical technology[M]. Beijing: China Machine Press,2011.
[2] 汤 昕,廖四军,杨 鑫. SF6混合/替代气体绝缘性能的研究进展[J]. 绝缘材料,2014,47(6):18-22.
TANG Xin,LIAO Sijun,YANG Xin. Research progress of SF6 mixed/alternative gas insulation performance[J]. Insulation Materials,2014,47(6):18-22.
[3] HIKITA M, OHTSUKA S, OKABE S, et al. Insulation characteristics of gas mixtures including perfluorocarbon gas[J]. IEEE Transactions on Dielectrics and Electrical Insulation ,2008,15(4):1015-1022.
[4] ZHONG L,YANG A,WANG X, et al. Dielectric breakdown properties of hot SF6-CO2 mixtures at temperatures of 300~3 500 K and pressures of 0.01~1.0 MPa[J]. Physics of Plasmas, 2014, 21(5):3506-3506.
[5] 吴经锋,张 璐,仲鹏峰,等. SF6绝缘电流互感器SF6/N2混合气体替代技术研究[J]. 高压电器,2018,54(5):223-229.
WU Jingfeng,ZHANG Lu,ZHONG Pengfeng,et al. Research on SF6 insulation current transformer SF6/N2 mixed gas substitution technology[J]. High Voltage Electrical Apparatus, 2018,54(5): 223-229.
[6] LARIN A V, MEURICE N, TRUBNIKOV D N, et al. Theoretical analysis of the synergism in the dielectric strength for SF6/CF4 mixtures[J]. Journal of Applied Physics,2004,96(1):109-117.
[7] MIDDLETON R L, ENG P. Cold-weather application of gas mixture(SF6/N2, SF6/CF4) circuit breakers: A utility user’s perspective[C]//1st Conference on SF6 and Environment: Emission and Reduction Strategies.[S.l.]:IEEE,2000:1-10.
[8] 王 琦,邱毓昌. N2/SF6混合气体在气体绝缘管道电缆中的应用[J]. 电线电缆,2004(1):28-29.
WANG Qi, QIU Yuchang. The application of N2/SF6 mixed gas in gas insulated pipeline cable[J]. Wire and Cable,2004(1):28-29.
[9] 王志刚,金光耀,柏长宇,等. SF6/N2混合气体1 100 kV GIL产品研制及应用[J]. 高压电器,2019,55(8):16-21.
WANG Zhigang,JIN Guangyao,BAI Changyu,et al. Development and application of SF6/N2 mixed gas 1 100 kV GIL product[J]. High Voltage Electrical Appliances, 2019,55(8): 16-21.
[10] HIKITA M,OHTSUKA S,OKABE S,et al. Insulation chara-cteristics of gas mixtures including perfluorocarbon gas[J]. IEEE Transactions on Dielectricsand Electrical Insulation,2008,15(4):1015-1022.
[11] 林 莘,李鑫涛,徐建源,等. 均匀电场下SF6气体击穿电 压的数值计算及光谱实验研究[J]. 中国电机工程学报, 2016, 36(1):301-309.
LIN Xin,LI Xintao,XU Jianyuan,et al. Numerical calculation and spectral experimental study of SF6 gas breakdown voltage under uniform electric field[J]. Chinese Journal of Electrical Engineering, 2016, 36(1):301-309.
[12] LIN X,WANG F M,XU J Y,et al. Study on the mathematical model of dielectric recovery characteristics in high voltage SF6 circuit breaker[J]. Plasma Science & Technology, 2016, 18(3):223-229.
[13] 王平波,黄观荣,李知城,等. 不同介质灭弧室串联的混合断路器仿真研究[J]. 高压电器,2019,55(6):51-55.
WANG Pingbo,HUANG Guanrong,LI Zhicheng,et al. Simulation research on hybrid circuit breakers with different dielectric interrupters in series[J]. High Voltage Apparatus, 2019,55(6): 51-55.
[14] 刘振祥,徐建源,谭盛武,等. 超B类感应电流快速释放装置冷态介质恢复特性计算及分析[J]. 高压电器,2018,54(7):242-247.
LIU Zhenxiang,XU Jianyuan,TAN Shengwu,et al. Calculation and analysis of cold medium recovery characteristics of ultra-B induced current rapid release device[J]. High Voltage Apparatus, 2018,54(7): 242-247.
[15] 李世欣. 高温混合气体临界击穿场强的计算研究[J].高压电器,2018,54(8):97-103.
LI Shixin.Calculation study on critical breakdown field strength of high temperature mixed gas[J]. High Voltage Apparatus,2018,54(8):97-103.
[16] 黄青丹,刘 静,曾 炼,等.气体介质临界击穿电场强度计算方法综述[J]. 电器与能效管理技术,2019(12):1-7.
HUANG Qingdan, LIU Jing, ZENG Lian, et al. Summary of calculation methods for critical breakdown electric field strength of gas media[J]. Electrical Appliances and Energy Efficiency Management Technology,2019(12):1-7.
[17] SIMKA P, SEEGER M, VOTTELER T, et al. Experimental investigation of the dielectric strength of hot SF6[C]//10th International Conference on the Properties and Applications of Dielectric Materials. Bangalore, India: [s.n.], 2012:1-4.
[18] 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.
LI Xintao,LIN Xin,XU Jianyuan, et al. Simulation and experiment of electric breakdown characteristics of SF6/N2 mixed gas[J]. Journal of Electrical Engineering and Technology, 2017,32(20):42-52.
[19] 林 莘,夏亚龙,孙广雷,等. 热态SF6介质击穿特性研究[J]. 高压电器,2018,54(7):111-118.
LIN Xin, XIA Yalong, SUN Guanglei, et al. Study on breakdown characteristics of hot SF6 medium[J]. High Voltage Apparatus,2018,54(7):111-118.
[20] 赵 虎,李兴文,贾申利,等. 1个大气压下50%SF6-50%CF4混合气体电击穿特性的研究[J]. 中国电机工程学报,2013,33(19):200-207.
ZHAO Hu, LI Xingwen,JIA Shenli, et al. Research on electric breakdown characteristics of 50%SF6-50%CF4 mixed gas at 1 atmosphere pressure[J]. Journal of the Chinese Society of Electrical Engineering,2013,33(19):200-207.
[21] 王流火,赵 虎,张 晗,等. PTFE蒸气对热态SF6气体电击穿特性的影响[J]. 高电压技术,2017,43(3):119-125.
WANG Liuhuo, ZHAO Hu, ZHANG Han, et al. Effect of PTFE vapor on electrical breakdown characteristics of hot SF6 gas[J]. High Voltage Technology, 2017,43(3):119-125.
[22] 王伟宗,吴 翊,荣命哲,等. 局域热力学平衡态空气电弧等离子体输运参数计算研究[J]. 物理学报,2012,61 (10):272-281.
WANG Weizong,WU Yi, RONG Mingzhe, et al. Calculation study of local thermodynamic equilibrium air arc plasma transport parameters[J]. Journal of Physics,2012,61 (10):272-281.
[23] 庚振新,石 岩,钟建英,等. SF6放电等离子体分解特性的研究[J].高压电器,2017,53(4):18-24.
GENG Zhenxin, SHI Yan, ZHONG Jianying,et al. Study on the decomposition characteristics of SF6 discharge plasma[J]. High Voltage Electrical Apparatus,2017,53(4):18-24.
[24] CEKMEN Z C, DINCER M S. Effective ionization coefficients and transport parameters in binary and ultradilute SF6-Ar mixtures using Boltzmann equation analysis[J]. Journal of Physics D:Applied Physics, 2009, 42(14):5208.
[25] HAGELAAR G J M,PITCHFORD L C. Solving the Boltzmann equation to obtain electron transport coeffir-cients and rate coefficients for fluid models[J]. Plasma Sources Science and Technology, 2005, 14(4):722-733.
[26] YOUSFI M,ROBIN-JOUAN P,KANZARI Z.Breakdown electric field calculations of hot SF6 for high voltage ecircuit breaker applications[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2005, 12(6):1192-1200.
[27] YOUSFI M,ROBIN-JOUAN P,KANZARI Z,Electron molecule collision cross sections needed for break down electric field calculations of hot dissociated SF6[J]. Journal of Physics Conference Series, 2008, 115(1):1-9.

备注/Memo

备注/Memo:
收稿日期:2020-02-17; 修回日期:2020-04-20基金项目:国家电网公司总部科技项目资助(SF6/N2混合气体隔离接地开关与GIL产品样机研制)。Project Supported by Science & Technology Project of State Grid Corporation of China (Development of SF6/N2 Mixed Gas Isolation Grounding Switch and GIL).钟建英(1975—),女,高级工程师(教授级),博士生导师,博士,从事交直流设备及综合能源、能源互联网方面的研究工作。
更新日期/Last Update: 2020-07-25