摘要
为解决雷击闪络造成的直流输电线路跳闸这一难题,建立了高速气流的速度冲击模型,分析了直流电弧运动的受力情况,并推导出直流电弧熄灭的条件;然后在建模分析的基础上,利用FLUNET软件仿真分析了在理想状态下高速气流熄灭直流弧的过程,并在高压试验室的条件下进行了灭弧试验。研究结果表明:仿真的灭弧时间为1.2 ms,而试验得出的灭弧时间为1.7 ms;由于仿真不能模拟真实的熄弧条件,因此仿真和试验得出的熄弧时间存在0.5 ms的误差,但都小于继电保护的动作时间。研究结果验证了高速气流灭弧防雷间隙熄灭直流电弧的有效性。
In order to solve the problem of lightning flashover caused by DC transmission line trip, we established a high-speed airflow velocity shock model, analyzed the force situation of DC arc motion, and derived the extinguishing conditions of DC arc Moreover, by analying the model and using the FLUNET software, we simulated and analyzed the arc-extinguishing process in high speed flow under ideal conditions, and conducted arc-extinguishing tests in high voltage laboratory conditions. The research results show that the extinguishing time of simulation is 1.2 ms, while the extinguishing time of test is 1.7 ms. Because the arc simulation can not simulate the real conditions, there is a 0.5 ms error between the arc extinguishing time obtained by simulation and test, but both of them are less than the action time of relay protection. The results verify the effectiveness of high-speed airflow arc-extinguishing anti-thunder gap and DC arc extinguishing.
作者
王巨丰
张华驿
李籽剑
冯凯
黄上师
WANG Jufeng;ZHANG Huayi;LI Zijian;FENG Kai;HUANG Shangshi(College of Electrical Engineering,Guangxi University,Nanning 530004,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2018年第8期2472-2478,共7页
High Voltage Engineering
基金
国家自然科学基金(51467002)~~
关键词
高速气流
直流电弧
熄灭条件
灭弧试验
灭弧时间
防雷
high-speed airflow
DC arc
extinguishing condition
arc-extinguishing test
arc-extinguishing time
lightningprotection