摘要
针对石墨间隙不同间距的配合使用问题,根据其工作原理并结合汤逊气体放电理论,采用1.2/50μs开路电压波和8/20μs短路电流波对不同级数的石墨间隙进行试验,结果表明:电压保护水平随着间隙距离的增加而增加,当间隙距离超过2mm时,电压保护水平远大于IEC规定的2.5kV。石墨间隙的残压、通流和动作响应时间都随着石墨级数的增加而增加,且间隙距离与残压比呈负相关关系。验证了石墨间隙的多间隙结构能够有效提升通流容量且减少续流。据此现象及理论分析,提出合理间隙距离条件下设计开关型电涌保护器的方法,在实际应用中具有一定参考价值。
Aiming at the problem of the use of graphite gaps with different spacings,according to its working principle and combined with the Thompson theory of gas discharge,we use the 1.2/50μs open circuit voltage wave and 8/20μs short-circuit current wave to test different series of graphite clearance.It is concluded that:the voltage protection level as the clearance increases with the increase of the distance,and when the gap distance is greater than 2 mm,the voltage protection level is greater than 2.5 kV stipulated by the IEC.The residual pressure,flow passage and action response time of the graphite gap all increase with the increase of the graphite order,and the gap distance is negatively correlated with the residual pressure ratio.It is verified that the multi-clearance structure of the graphite gap can effectively improve the flow capacity and reduce the flow continuation.Based on the phenomenon and theoretical analysis,the design method of switch type surge protector under the condition of reasonable gap distance is put forward,which has certain reference value in practical application.
作者
徐乐
曹洪亮
游志远
王成芳
陈建华
XU Le;CAO Hongliang;YOU Zhiyuan;WANG Chengfang;CHEN Jianhua(Yangzhou Meteorological Service,Jiangsu,Yangzhou 225009;Wujiang Construction Engineering Quality-Inspection Center Co.,Ltd,Jiangsu,Suzhou 215000;Suzhou Institute of Building Science Group Co.,Ltd,Jiangsu,Suzhou 310012;Jiangxi Meteorological Service,Nanchang 330046)
出处
《气象科技》
2021年第3期498-503,共6页
Meteorological Science and Technology
基金
国家自然科学基金项目(41175003)
江苏高校优势学科建设工程资助项目(PAPD)资助。
关键词
石墨间隙
气体放电
响应时间
残压
通流
graphite gap
gas discharge
response time
residual pressure
through flow
