典型断口结构下C4F7N/CO2混合气体绝缘特性实验研究与仿真分析

doi:10.19595/j.cnki.1000-6753.tces.201117

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摘要

环保C₄F₇N/CO₂混合气体是目前最具潜力的SF₆替代介质。为研究C₄F₇N/CO₂混合气体绝缘特性及其与典型断口结构下电场的匹配关系,该文结合72.5kV开关产品隔离断口、同轴电极两种结构进行了样机设计,通过实验研究了雷电冲击电压下,不同充气压力、不同断口开距等对气体绝缘性能的影响,通过仿真计算获得了不同断口结构、不同断口开距下的电场强度分布变化。实验与仿真结果表明,隔离断口结构及同轴电极结构下,表压0.4MPa的20%C₄F₇N+80%CO₂混合气体、表压0.5MPa的16.7%C₄F₇N+83.3%CO₂混合气体,绝缘强度均可达到同等气压下纯SF₆气体的80%以上。在隔离断口结构下,开距8mm、246kV施加电压（0.4MPa下50%击穿电压）,计算断口间的最高电场强度为38.3kV/mm;在同轴电极结构下,间隙10mm、228.5kV施加电压（0.4MPa下50%击穿电压）,计算同轴间隙间的最高电场强度为26.8kV/mm。为达到表压0.4MPa、开距6mm下纯SF₆气体的绝缘水平,C₄F₇N/CO₂混合气体的压力可增大至0.5MPa或断口距离增大至约8mm。该文最后还对C₄F₇N/CO₂混合气体的电场强度设计基准进行了探讨。实验研究与仿真分析结果验证了C₄F₇N/CO₂混合气体工程应用的可行性,尤其对开关设备中应用C₄F₇N/CO₂混合气体时的绝缘结构设计具有指导意义。

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关键词 ： C₄F₇N/CO₂, 绝缘特性, 典型断口, 仿真分析

Abstract：

Eco-friendly C₄F₇N/CO₂ mixed gas is one of the most potential substitutes for SF₆ at present. In order to study the insulation characteristic of the C₄F₇N/CO₂ mixed gas, and to search its matching relationship with the electric field under the typical clearance structure, the prototype was designed based on 72.5kV switch product including two kinds of electrode structures: disconnecting contact and coaxial electrode. The effects of different inflation pressures and different contact distances on the gas insulation performance under lightning impulse voltage was studied by experiments, and the electric field distribution changes under different clearance structures and different clearance distances were obtained through simulation calculation. Experimental and simulation results show that under the disconnecting contact structure and the coaxial electrode structure, 20%C₄F₇N+80%CO₂ mixed gas with a gauge pressure of 0.4MPa and 16.7% C₄F₇N+83.3%CO₂ mixed gas with a gauge pressure of 0.5MPa, of which the insulation strength can reach more than 80% of the pure SF₆ gas insulation strength at the same pressure. Under the disconnecting contact structure, the clearance distance is 8mm, 246kV applied voltage (50% breakdown voltage at 0.4MPa), the highest electric field strength between clearances is 38.3kV/mm; under the coaxial electrode structure, the gap is 10mm, and the applied voltage is 228.5kV (50% breakdown voltage at 0.4MPa), the highest electric field strength between coaxial gaps is 26.8kV/mm. In order to achieve the insulation level of pure SF₆ gas at a gauge pressure of 0.4MPa and a distance of 6mm, the pressure of the C₄F₇N/CO₂ mixed gas can be increased to 0.5MPa or the contact distance can be increased to about 8mm. At the end of this article, the field strength design basis of C₄F₇N/CO₂ mixed gas is discussed. The experimental research and simulation analysis in this article have verified the feasibility of C₄F₇N/CO₂ mixed gas engineering application, Especially, it has guiding significance for the design of insulation structure when C₄F₇N/CO₂ mixed gas is used in switchgear.

Key words： C₄F₇N/CO₂ insulation characteristics typical clearance structure simulation analysis

收稿日期: 2020-08-28

PACS:

TM213

基金资助:

陕西省重点研发计划资助项目（高压气体断路器数字化平台建设及关键技术,项目编号2019ZDLGY18-08）

作者简介: 辛昭昭男,1983年生,硕士,高级工程师,研究方向为中高压开关设计与电磁仿真。E-mail：xinzhao9916@163.com;姜旭男,1982年生,博士,高级工程师,研究方向为高压SF₆开关及环保型电力设备设计与仿真技术。E-mail：xu_jiang_cn@163.com

引用本文:

辛昭昭, 姜旭, 霍鹏. 典型断口结构下C₄F₇N/CO₂混合气体绝缘特性实验研究与仿真分析[J]. 电工技术学报, 2021, 36(17): 3572-3580. Xin Zhaozhao, Jiang Xu, Huo Peng. Experimental Research and Simulation Analysis of Insulation Characteristics of C₄F₇N/CO₂ Mixed Gas under Typical Clearance Structure. Transactions of China Electrotechnical Society, 2021, 36(17): 3572-3580.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.201117 https://dgjsxb.ces-transaction.com/CN/Y2021/V36/I17/3572

[1] 李兴文, 赵虎. SF₆替代气体的研究进展综述[J]. 高电压技术, 2016, 42(6): 1695-1701.
Li Xingwen, Zhao Hu.Review of research progress in SF₆ substitute gases[J]. High Voltage Engineering, 2016, 42(6): 1695-1701.
[2] 肖登明. 环保型绝缘气体的发展前景[J]. 高电压技术, 2016, 42(4): 1035-1046.
Xiao Dengming.Development prospect of gas insulation based on environmental protection[J]. High Voltage Engineering, 2016, 42(4):1035-1046.
[3] 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): 788-794.
Man Linkun, Deng Yunkun, Xiao Dengming.Insulating properties of c-C₄F₈/N₂ and c-C₄F₈/CO₂ mixtures[J]. High Voltage Engineering, 2017, 43(3): 788-794.
[4] 张然, 王珏, 李璟, 等. 替代SF₆ 的环境友好混合气体c-C₄F₈/N₂绝缘特性[J]. 高电压技术, 2017, 43(2): 414-419.
Zhang Ran, Wang Jue, Li Jing, et al.Insulation characteristics of environmentally friendly mix gas c-C₄F₈/N₂ substituting SF₆[J]. High Voltage Engineering, 2017, 43(2): 414-419.
[5] Tanaka Y, Yamachi N, Matsumoto S, et al.Thermodynamic and transport properties of CO₂, CO₂-O₂, CO₂-H₂ mixtures at temperatures of 300 to 30000K and pressures of 0.1 to 10MPa[J]. Electrical Engineering in Japan, 2008, 163(4): 18-29.
[6] 张晓星, 叶凡超, 张国治, 等. C₄F₇N/N₂混合气体在极不均匀电场下的局部放电特性[J]. 电网技术, 2019, 43(12): 1-7.
Zhang Xiaoxing, Ye Fanchao, Zhang Guozhi, et al.Partial discharge characteristics of C₄F₇N/N₂ mixture in highly non-uniform electric field[J]. Power System Technology, 2019,43(12):1-7.
[7] 李兴文, 邓云坤, 姜旭, 等. 环保气体C₄F₇N和C₅F₁₀O与CO₂混合气体的绝缘性能及其应用[J]. 高电压技术, 2017, 43(3): 708-714.
Li Xingwen, Deng Yunkun, Jiang Xu, et al.Insulation performance and application of enviroment-friendly gases mixtures of C₄F₇N and C₅F₁₀O with CO₂[J]. High Voltage Engineering, 2017, 43(3): 708-714.
[8] 姜旭, 霍鹏, 朱会, 等. 环保型C₄F₇N/CO₂混合气体试验平台搭建及绝缘特性分析[J]. 高压电器, 2018, 54(7): 179-183.
Jiang Xu, Huo Peng, Zhu Hui, et al.Building test platform and analyzing insulation characteristics of eco-friendly mixed gas C₄F₇N/CO₂[J]. High Voltage Apparatus, 2018, 54(7): 179-183.
[9] 张晓星, 陈琪, 张季, 等. 高气压下环保型C₄F₇N/CO₂混合气体工频击穿特性[J]. 电工技术学报, 2019, 34(13): 2839-2845.
Zhang Xiaoxing, Chen Qi, Zhang Ji, et al.Power frequency breakdown characteristics of environmental-friendly C₄F₇N/CO₂ gas mixtures under high pressure conditions[J]. Transactions of China Electrotechnical Society, 2019, 34(13): 2839-2845.
[10] 吕启深, 郭泽, 徐宏宇, 等. C₄F₇N -CO₂混合气体自由燃弧电弧特性实验研究[J]. 高电压技术, 2019, 45(12): 3804-3809.
Lü Qishen, Guo Ze, Xu Hongyu, et al.Experimental study on the free arc-burning arc characteristics of C₄F₇N-CO₂ mixture[J]. High Voltage Engineering, 2019, 45(12): 3804-3809.
[11] 陈琪, 张晓星, 李祎, 等. 环保绝缘介质C₄F₇N/ CO₂/O₂混合气体的放电分解特性[J]. 电工技术学报, 2020, 35(1): 64-72.
Chen Qi, Zhang Xiaoxing, Li Yi, et al.The discharge decomposition characteristics of environmental-friendly insulating medium C₄F₇N/CO₂/O₂ gas mixture[J]. Transactions of China Electrotechnical Society, 2020, 35(1): 64-72.
[12] 付鲁军, 邵先军, 辛昭昭, 等. C₄F₇N/CO₂混合气体在中压负荷开关中的开断性能实验研究[J]. 高压电器, 2020, 56(8): 86-91.
Fu Lujun, Shao Xianjun, Xin Zhaozhao, et al.Experimental research on breaking performance of C₄F₇N/CO₂ mixed gas in medium voltage load switch[J]. High Voltage Apparatus, 2020, 56(8):86-91.
[13] 刘一树, 丁卫东, 李志闯, 等. C₄F₇N/CO₂混合气体中绝缘子工频沿面闪络特性[J]. 高电压技术, 2019, 45(12): 3854-3859.
Liu Yishu, Ding Weidong, Li Zhichuang, et al.Surface flashover discharge under power frequency voltage in C₄F₇N/CO₂[J]. High Voltage Engineering, 2019, 45(12): 3854-3859.
[14] 李志闯, 郑忠波, 刘一树, 等. C₄F₇N/CO₂混合气体中252kV盆式绝缘子工频延面闪络特性研究[J]. 电工技术学报, 2020, 35(1): 75-82.
Li Zhichuang, Zheng Zhongbo, Liu Yishu, et al.Surface flashover characteristics of 252kV conical insulator in C₄F₇N/CO₂ gas mixtures under ac voltage[J]. Transactions of China Electrotechnical Society, 2020, 35(1): 75-82.
[15] 郑宇, 周文俊, 喻剑辉, 等. 温度对C₄F₇N/CO₂混合气体工频放电电场强度的影响规律[J]. 电工技术学报, 2020, 35(1): 10-19.
Zheng Yu, Zhou Wenjun, Yu Jianhui, et al.Influence of temperature on power frequency discharge field intensity of C₄F₇N/CO₂ mixed gas[J]. Transactions of China Electrotechnical Society, 2020, 35(1):10-19.
[16] 高克利, 颜湘莲, 刘焱, 等. 环保气体绝缘管道技术研究进展[J]. 电工技术学报, 2020, 35(1): 3-20.
Gao Keli, Yan Xianglian, Liu Yan, et al.Progress of technology for environment-friendly gas insulated transmission line[J]. Transactions of China Electrotechnical Society, 2020, 35(1): 3-20.
[17] 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.
[18] 姜旭, 金海云, 张文兵, 等. 环保型C₄F₇N/CO₂混合气体在极不均匀电场下的雷电冲击绝缘特性[J]. 中国电机工程学报, 2020, 40(3): 1030-1037.
Jiang Xu, Jin Haiyun, Zhang Wenbing, et al.Lightning impulse insulation properties of eco-friendly C₄F₇N/CO₂ mixed gas under extremely non-uniform electric field[J]. Proceedings of the CSEE, 2020, 40(3): 1030-1037.