电工技术学报  2020, Vol. 35 Issue (1): 70-79    DOI: 10.19595/j.cnki.1000-6753.tces.190845
环保型管道输电技术专题 |
气体绝缘输电线路用C3F7CN/CO2混合气体与环氧树脂相容性试验
袁瑞君1, 李涵1, 郑哲宇1, 周文俊1, 叶三排2
1. 武汉大学电气与自动化学院 武汉 430072;
2. 国网平高集团有限公司 平顶山 467001
Experiment on the Compatibility between C3F7CN/CO2 Gas Mixture and Epoxy Resin Used in Gas Insulated Transmission Line
Yuan Ruijun1, Li Han1, Zheng Zheyu1, Zhou Wenjun1, Ye Sanpai2
1. School of Electrical Engineering and Automation Wuhan University Wuhan 430072 China;
2. State Grid Pinggao Group Co. Ltd Pingdingshan 467001 China
全文: PDF (4428 KB)   HTML
输出: BibTeX | EndNote (RIS)      
摘要 气体绝缘输电线路(GIL)中气体与固体绝缘材料的相容性表现为:两种材料长期接触后导致的绝缘性能变化以及气体成分和固体材料的改变。作为目前有潜力替代SF6的环保绝缘气体,C3F7CN/CO2混合气体与GIL内使用的环氧树脂材料之间的相容性亟待研究,因相容性不良可能引发设备的绝缘故障。该文提出C3F7CN/CO2气体与环氧树脂相容性的评价方法,搭建气固相容性试验平台,在不同温度下进行C3F7CN/CO2与环氧树脂的热加速试验,并设置惰性气体He和SF6作为对照试验组。比较试验前后环氧树脂的介质损耗、沿面闪络电压、表面形貌与气体成分,发现不同试验组中的环氧树脂沿面绝缘性能均未下降;仅当试验温度为160℃时,C3F7CN/CO2中检测出少量的C3F6和C3F7CN三聚体,推测此条件下环氧树脂与C3F7CN发生了化学反应,但并未对环氧树脂的绝缘性能产生影响。试验结果表明,在GIL正常运行条件下,C3F7CN/CO2与环氧树脂具有较好相容性,与SF6与环氧树脂的相容性相当。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
袁瑞君
李涵
郑哲宇
周文俊
叶三排
关键词 C3F7CN/CO2环氧树脂相容性SF6替代气体    
Abstract:The compatibility between gas and solid insulating materials in gas insulated transmission lines (GIL) is defined as follows: the changes of insulation performance caused by long-term contact between the two materials and the changes of gas composition and solid material. As an environmental-friendly insulating gas with potentiality to replace SF6, the compatibility between C3F7CN/CO2 and epoxy resin used in GIL needs to be studied urgently to avoid insulation failure of equipment. The authors proposed the method for evaluating the compatibility and set up a gas-solid compatibility test platform in this paper. Thermal acceleration tests of C3F7CN/CO2 and epoxy resin are carried out at different temperatures. Also, the control groups of SF6 and He gas were set to distinguish the influence of temperature. Dielectric loss, surface flashover voltages, surface morphology of epoxy resin and gas composition before and after the tests were compared. A small amount of C3F6 and trimer of C3F7CN were found after testing at 160℃ and the surface insulation properties of epoxy resins did not deteriorate. Tests results shows the compatibility between C3F7CN/CO2 and epoxy resin is as good as the compatibility between SF6 and epoxy resin under normal operation of GIL.
Key wordsC3F7CN/CO2    epoxy resin    compatibility    SF6-alternative gas   
收稿日期: 2019-07-11      出版日期: 2020-01-17
PACS: TM213  
基金资助:国家重点研发计划(2017YFB0902500)和国家电网有限公司总部科技项目(环保型管道输电关键技术)资助
通讯作者: 李 涵 男,1980年生,博士,研究方向为高电压绝缘技术与气体放电。E-mail: li_han@whu.edu.cn   
作者简介: 袁瑞君 女,1996年生,硕士研究生,研究方向为气体绝缘技术。E-mail:2018202070015@whu.edu.cn
引用本文:   
袁瑞君, 李涵, 郑哲宇, 周文俊, 叶三排. 气体绝缘输电线路用C3F7CN/CO2混合气体与环氧树脂相容性试验[J]. 电工技术学报, 2020, 35(1): 70-79. Yuan Ruijun, Li Han, Zheng Zheyu, Zhou Wenjun, Ye Sanpai. Experiment on the Compatibility between C3F7CN/CO2 Gas Mixture and Epoxy Resin Used in Gas Insulated Transmission Line. Transactions of China Electrotechnical Society, 2020, 35(1): 70-79.
链接本文:  
https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.190845          https://dgjsxb.ces-transaction.com/CN/Y2020/V35/I1/70