高电压技术2017，Vol.43Issue(5)：1635-1641,7.DOI:10.13336/j.1003-6520.hve.20170428032
强气流下灭弧防雷间隙的气流场仿真及灭弧试验研究
Research on Airflow Field Simulation and Arcing Test of Arc-extinguishing Lightning Protection Gap Under Strong Airflow
摘要
Abstract
In order to investigate the influencing factors of arc-extinguishing effectiveness of arc-extinguishing lightning protection gap under strong airflow,on the basis of the extremely fast arc-cutting lightning protection new theory,we researched the restraining arc development mechanism of arc-extinguishing lightning protection gap under strong airflow.Moreover,we used a chain arc model to analyze movement of arc element and calculate the arc element speed equation,and used the ANSYS AUTODYN to simulate the airflow field of different inlet air pressure values.Thereby,we obtained the numerical simulation of airflow velocity,and carried out arc-extinguishing experiment.Finally,we adopted statistical data according to arc-extinguishing time of each test to further study the effect of arc-extinguishing.The results show that when the arc tube inlet air pressure is 20 MPa,the airflow speed can reach 573.9 m/s.The higher the arc tube inlet air pressure,the bigger the airflow speed,the faster the recovery of gas medium after current zero,the more conducive to arc-extinguishing.The actual value of arc-extinguishing time is in agreement with the calculated value,arc will elongate until being extinguished in 4.6 ms.Arc-extinguishing time is negatively correlated with fault arc current,and it is positively correlated with the airflow velocity,the higher the airflow velocity,the shorter the arc-extinguishing time,which demonstrates the importance of airflow velocity to arc-extinguishing.关键词
强气流/灭弧防雷间隙/电弧元/伏秒特性/绝缘子/灭弧时间Key words
strong airflow/arc-extinguishing lightning protection gap/arc element/voltage-time characteristic/insulator/arc-extinguishing time引用本文复制引用
黄萍,王巨丰..强气流下灭弧防雷间隙的气流场仿真及灭弧试验研究[J].高电压技术,2017,43(5):1635-1641,7.基金项目
国家自然科学基金(50867002).Project supported by National Natural Science Foundation of China(50867002). （50867002）
