高电压技术2017，Vol.43Issue(12)：3862-3868,7.DOI:10.13336/j.1003-6520.hve.20171127006
基于SF6替代气体的高压混合断路器开断特性
Interruption Characteristics of High-voltage Hybrid Circuit Breaker Based on the Alternative of SF6 Gas
摘要
Abstract
To investigate the interruption characteristics of a high-voltage hybrid circuit breaker based on the substitute for SF6 gas,we prepared a test prototype of the hybrid circuit breaker composed of gas gap and vacuum gap,while the gas gap was filled with SF6 gas and CO2 gas,respectively.Based on the synthetic test circuit,the interruption performances of two types of hybrid circuit breakers were tested and compared.Moreover,the influences of different gas interruption dielectrics on the interruption performance of hybrid circuit breaker were analyzed.The influential factors on the interruption capacity of CO2 gas gap were discussed.As the test results convey,under favorable operating strategies,vacuum gap can provide about 100 μts for the dielectric strength recovery in gas gap.But limited by the slow dielectric strength recovery speed of CO2 gas in rotating arc gas interrupter,CO2 gas gap cannot cooperate with vacuum gap to achieve satisfied interruption performances compared to SF6 gas gap.The improvements in the interruption performance of CO2 gas gap are limited while increasing the gas pressure from 0.8 MPa to 0.6 MPa,as the breakdown voltage of 0.8 MPa CO2 gas gap is only 8 kV after 500 ts since current zero.It is suggested that the structure of gas interrupter should be optimized after combining with the properties of CO2 gas so as to enhance its interruption capacity and provide a basis for the development ofhvbrid circuit breaker based on CO2 gas.关键词
SF6气体间隙/CO2气体间隙/真空间隙/介质强度恢复速度/开断性能Key words
SF6 gas gap/CO2 gas gap/vacuum gap/dielectric strength recovery speed/interruption performance引用本文复制引用
程显,陈占清,葛国伟,焦连曜,廖敏夫..基于SF6替代气体的高压混合断路器开断特性[J].高电压技术,2017,43(12):3862-3868,7.基金项目
国家自然科学基金(51407163 （）
51477024) （）
中国博士后科学基金(2014M552012 （）
2015T80778) （）
河南省国际科技合作计划项目(152102410019).Project supported by National Natural Science Foundation of China (51407163,51477024),China Postdoctoral Science Foundation (2014M552012,2015T80778),International Science& Technology Cooperation Project of Henan Province of China (152102410019). （152102410019）
