电网技术2012，Vol.36Issue(4)：260-264,5.
0．1-0．25MPa气压下二元混合气体SF6-N2和SF6-CO2的击穿特性
Breakdown Characteristics of Binary Gas Mixtures SF6-N2 and SF6-CO2 Under 0.1-4）.25 MPa Atmosphere Pressures
摘要
Abstract
Owing to its high reliability, security and small size, the cubicle gas insulated switchgear （C-GIS）, in which the SF6 gas is utilized as the principal insulating medium, is widely adopted in power system. However, due to high cost and strong greenhouse effect of SF6, it is urgently needed to reduce the amount of SF6 used in C-GIS or not to use it. According to the lower pressure inside C-GIS cabinet, the feasibility of replacing pure SF6 gas by gas mixture composed of SF6 is researched. In th~s research, circular plate electrodes are adopted to simulate uniform electric field and the breakdown characteristics of binary gas mixtures of SF6-CO2 and SF6-N2 under different gas mixing ratios and different forms of voltages, namely the power frequency voltage and negative polarity of lightning surge, in uniform electric field with lower atmosphere pressures within the range from 0.1 MPa to 0.25 MPa inside C-GIS cabinet are respectively researched. Test results show that when atmosphere pressure is lower than 0.25 MPa, the insulation strength of gas mixture can reach to the same as insulation strength of pure SF6 gas by raising the atmosphere pressure of SF6 gas mixture appropriately. Results of this research offer key teat basis for the design and manufacture of new type of C-GIS cabinet.关键词
混合气体/击穿特性/柜式气体绝缘开关设备/（C-GIS）/SF6-N2/SF6-C02Key words
gas mixture/breakdown characteristic/cubicle gas insulated switchgear (C-GIS)/SF6-N2/SF6-CO2分类
信息技术与安全科学引用本文复制引用
李旭东,周伟,屠幼萍,张贵峰,王璁..0．1-0．25MPa气压下二元混合气体SF6-N2和SF6-CO2的击穿特性[J].电网技术,2012,36(4):260-264,5.基金项目
“十一五”国家科技支撑计划项目（2009BAG12A00）. （）
