C4F7N/CO2混合气体中252kV盆式绝缘子工频沿面闪络特性研究

doi:10.19595/j.cnki.1000-6753.tces.190975

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Abstract Developing alternatives to SF₆ and investigating its feasibility of application to gas-insulated equipment have become one of the hot spots in the field of electrical engineering in recent years. C₄F₇N is an environment-friendly insulating gas with low global warming potential and excellent insulation performance, its mixtures with CO₂ are expected to completely replace SF₆. In this paper, the power frequency voltage withstand and surface flashover characteristics of 252kV conical insulators are studied in mixed gases with C₄F₇N content of 5%, 9% and 13%, and compared with the test results in 0.5MPa SF₆. It is shown that most flashovers along the surface occur on the concave side of the insulator rather than on the convex side. The surface flashover voltage of C₄F₇N/CO₂ mixture increases with the increase of gas pressure. Under the same gas pressure, the surface flashover voltage increases as the content of C₄F₇N in gas mixture increases, and there is a saturation trend. The flashover voltage of insulators in the 9% C₄F₇N/91% CO₂ gas mixture under 0.6MPa is approximately equal to that in SF₆ under 0.5MPa. The design criteria of the electrical field strength is given based on the experimental results.

Key words： C₄F₇N /CO₂ gas mixture power frequency voltage surface flashover 252kV conical insulator

Received: 31 July 2019 Published: 17 January 2020

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TM85

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	Li Zhichuang
	Zheng Zhongbo
	Liu Yishu
	Ding Weidong
	Li Xinyi

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Li Zhichuang,Zheng Zhongbo,Liu Yishu等. Surface Flashover Characteristics of the 252kV Conical Insulator in C₄F₇N/CO₂ Gas Mixtures under AC Voltage[J]. Transactions of China Electrotechnical Society, 2020, 35(1): 62-69.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.190975 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I1/62

[1] 李鹏, 颜湘莲, 王浩, 等. 特高压交流 GIL 输电技术研究及应用[J]. 电网技术, 2017, 41(10): 3161-3167.
Li Peng, Yan Xianglian, Wang Hao, et al.Research and application of UHVAC gas-insulated transmission line[J]. Power System Technology, 2017, 41(10): 3161-3167.
[2] 王亚楠, 丁卫东, 苟杨, 等. 气体绝缘金属封闭输电线路(GIL)接地问题探讨[J]. 高压电器, 2016, 52(4): 98-102.
Wang Yanan, Ding Weidong, Gou Yang, et al.Discussion of the grounding method of gas insulated transmission line[J]. High Voltage Apparatus, 2016, 52(4): 98-102.
[3] Wets'03 Workshop “World Energy Transmission Systems” Discussion Topics[OL]. http://jicable.org/ wets03/pdf/wets03-1-07.pdf.
[4] Koch H, Hillers T.Second-generation gas-insulated line[J]. Power Engineering Journal, 2002, 16(3): 111-116.
[5] 张潮海, 韩冬, 李康, 等. SF₆替代气体技术及其在GIL中的应用与发展[J]. 高电压技术, 2017, 43(3): 689-698.
Zhang Chaohai, Han Dong, Li Kang, et al.SF₆ Alternative techniques and their applications and prospective developments in gas insulated transmission lines[J]. High Voltage Engineering, 2017, 43(3): 689-698.
[6] Technical Data: 3M^TM Novec^TM 4710 Dielectric Fluid[Z]. Data: 3M^TM Novec^TM 4710 Dielectric Fluid[Z]. 2015.
[7] Nechmi H E, Beroual A, Girodet A, et al.Fluoronitriles/ CO₂ gas mixture as promising substitute to SF₆ for insulation in high voltage applications[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2016, 23(5): 2587-2593.
[8] Nechmi H E, Beroual A, Girodet A, et al.Effective ionization coefficients and limiting field strength of fluoronitriles-CO₂ mixtures[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2017, 24(2): 886-892.
[9] 龙云翔, 郭立平, 沈震宇, 等. SF₆替代气体C₄F₇N-N₂电离特性的稳态汤逊法研究[J]. 高电压技术, 2019, 45(4): 1064-1070.
Long Yunxiang, Guo Liping, Shen Zhenyu, et al.Investigation of ionization characteristics of C₄F₇N-N₂ gas mixtures as alternative gas to SF₆ by steady-state Townsend method[J]. High Voltage Engineering, 2019, 45(4): 1064-1070.
[10] 王凌志, 周文俊, 张天然, 等. C₄F₇N/CO₂混合气体在均匀和极不均匀电场下的工频绝缘性能[J]. 高电压技术, 2019, 45(4): 1101-1107.
Wang Lingzhi, Zhou Wenjun, Zhang Tianran, et al.Power frequency insulation performance of C₄F₇N/CO₂ mixture under uniform and extremely non-uniform electric field[J]. High Voltage Engineering, 2019, 45(4): 1101-1107.
[11] 屠幼萍, 艾昕, 成毅, 等. C₃F₇CN/N₂混合气体的直流击穿特性[J]. 电工技术学报, 2018, 33(22): 5189-5195.
Tu Youping, Ai Xin, Cheng Yi, et al.DC breakdown characteristics of C₃F₇CN/N₂ gas mixtures[J]. Transactions of China Electrotechnical Society, 2018, 33(22): 5189-5195.
[12] 李志闯, 丁卫东, 高克利, 等. C₄F₇N/CO₂混合气体中环氧绝缘子雷电冲击沿面绝缘特性[J]. 高电压技术, 2019, 45(4): 1071-1077.
Li Zhichuang, Ding Weidong, Gao Keli, et al.Surface flashover characteristics of epoxy insulator in C₄F₇N/CO₂ mixtures under lightening impulse voltage[J]. High Voltage Engineering, 2019, 45(4): 1071-1077.
[13] Li Zhichuang, Ding Weidong, Liu Yishu, et al.Surface flashover characteristics of epoxy insulator in C₄F₇N/CO₂ mixtures in a uniform field under AC voltage[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2019, 26(4): 1065-1072.
[14] 孙秋芹, 罗宸江, 汪沨, 等. 特高压GIS 盆式绝缘子沿面闪络特性研究综述[J]. 高压电器, 2018, 54(5): 17-25.
Sun Qiuqin, Luo Chenjiang, Wang Feng, et al.Overview on the surface flashover of basin-type insulator in UHV GIS[J]. High Voltage Apparatus, 2018, 54(5): 17-25.
[15] Volpov E.Dielectric strength coordination and generalized spacer design rules for HVAC/DC SF₆ gas insulated systems[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2004, 11(6): 949-963.
[16] 黎斌. SF6高压电器设计[M]. 5版. 北京: 机械工业出版社, 2019.
[17] GB311.1—2012 绝缘配合第1部分: 定义、原则和规则[S]. 2012.
[18] IEC60071.1—2011 Insulation for co-ordination high voltage transmission and distribution equipment[S]. 2011.
[19] Koch H.Gas insulated transmission lines (GIL)[M]. New Jersey: John Wiley & Sons, 2012.
[20] Cooke C M.Surface flashover of gas/solid interfaces[C]// Proceedings of the Third International Symposium on Gaseous Dielectrics, Knoxille, Tennessee, USA, 2013: 337-348.