高电压技术2017，Vol.43Issue(5)：1535-1542,8.DOI:10.13336/j.1003-6520.hve.20170428019
SF6断路器动态接触电阻测量方法及影响因素
Measurement Method and Influencing Factors of the Dynamic Contact Resistance of SF6 Circuit Breakers
摘要
Abstract
Dynamic contact resistance measurement is an effective method to measure the erosion condition of arcing contacts of SF6 circuit breakers.However,there are many factors influencing dynamic contact resistance measurement.So it is important to analyze arcing contacts erosion condition accurately by studying these influencing factors.By building a measurement circuit of dynamic contact resistance and an SF6 circuit breaker test model,the influences of measurement current,power-supply types,arc erosion,the opening speed of circuit breakers on the dynamic contact resistance are analyzed.The results show that measurement current should be more than 1 000 A for obtaining accurate dynamic contact resistance.Both super capacitors and batteries can be used as power supply,and the output current of batteries is more stable.Arc erosion produced by 30 kA test current is more serious than that produced by 10 kA test current.Dynamic contact resistance will increase by 169.9 μΩ and 11.9 μΩ after 100 tests,respectively.Dynamic contact resistance is less affected when the opening speed of circuit breakers range from 4.4 rn/s to 8.43 m/s.The biggest difference is 15.6 μΩ.关键词
SF6断路器/弧触头/动态接触电阻/测量电流/分闸速度/电源型式/电弧烧蚀Key words
SF6 circuit breaker/arcing contact/dynamic contact resistance/measurement current/opening speed/power resource type/arc erosion引用本文复制引用
傅中,陈维江,李志兵,刘北阳,邢高启,李宾宾..SF6断路器动态接触电阻测量方法及影响因素[J].高电压技术,2017,43(5):1535-1542,8.基金项目
国家电网公司科技项目(52120016000W).Project supported by Science and Technology Project of SGCC(52120016000W). （52120016000W）
