中国电机工程学报2025，Vol.45Issue(10)：4067-4076,中插32,11.DOI:10.13334/j.0258-8013.pcsee.240084
六氟-2-丁炔及其与N2混合的电离与击穿特性
Ionization and Breakdown Characteristics of Hexafluoro-2-butyne and Its Mixture With N2
摘要
Abstract
To evaluate the feasibility of using hexafluoro-2-butyne(C4F6)as a substitute for SF6 gas in gas insulated power equipment,the ionization and breakdown characteristics of C4F6 pure gas and C4F6/N2 mixtures are studied.The reduced ionization coefficient,reduced attachment coefficient,and critical reduced field strength(E/N)lim of C4F6 and C4F6/N2 mixtures in the range of 200 to 800 Td(1 Td=10-21V·m2)are measured through steady-state Townsend(SST)test,and their insulation performance and stability are evaluated through breakdown discharge test under power frequency voltages.The results show that the(E/N)lim of C4F6 gas is 697.7 Td,which is 1.96 times that of SF6.The(E/N)lim of C4F6/N2 mixture shows a linear growth pattern with the increase of C4F6 molar ratio,and there is no synergistic effect between C4F6 and N2.The(E/N)lim value of 34.0％C4F6/66％N2 mixture is equivalent to SF6.The insulation strength of 25％C4F6/75％N2 under 0.5 MPa is 0.89 compared to SF6 under the same pressure.After the breakdown test,a large number of solid decomposition products are generated on the electrode surface,indicating poor stability of C4F6 gas.Taking into account insulation performance and stability,C4F6 and its mixture are difficult to be applied as insulation media in gas insulated equipment.关键词
六氟-2-丁炔/SF6替代气体/稳态汤逊试验/临界约化场强/击穿特性Key words
hexafluoro-2-butyne/SF6 alternative gas/steady state Townsend(SST)/critical reduced field strength/breakdown characteristics分类
信息技术与安全科学引用本文复制引用
向志辉,郑宇,任书波,郝东昕,颜湘莲,董利,周文俊..六氟-2-丁炔及其与N2混合的电离与击穿特性[J].中国电机工程学报,2025,45(10):4067-4076,中插32,11.基金项目
国家重点研发计划项目(2021YFB2401400).National Key R&D Program of China(2021YFB2401400). （2021YFB2401400）
