南方电网技术2023，Vol.17Issue(12)：119-126,151,9.DOI:10.13648/j.cnki.issn1674-0629.2023.12.014
基于气吹原理的一体化防雷间隙快速灭弧方法
Rapid Arc-Extinguishing Method of Integrated Lightning Protection Gap Based on the Principle of Air-Blowing
摘要
Abstract
The structure of the parallel gap is simple.However,after the lightning strike,the arc caused by the power frequency continuous flow cannot be extinguished quickly,so the tripping rate of the line rises.A new integrated lightning protection gap is proposed,which uses magnetic energy air blowing device to spray high-energy air flow acts on the gap arc,causing it to quickly extinguish the arc,and accelerate the dissipation of arc energy,while quickly thinning the gap arc,cutting off the power frequency cur-rent,and achieving the goal of rapid arc extinguishment.Based on the theory of magnetohydrodynamics(MHD),a finite element simulation analysis software is used to construct the theoretical model,and AC arc extinguishing experiments are conducted.The research results show that the integrated lightning protection gap based on the principle of air blowing can reduce the arc column temperature of the arc to 1/5 of the original in a short time,blow the arc to 30%of the original,and make the arc extinguishing time no more than 5 ms,which is only 6%～8%of the traditional protection gap extinguishing time.The proposed method greatly shortens the extinguishing time of gap power frequency continuous current arc,and ensures the power supply reliability of the power system.关键词
保护间隙/一体化防雷间隙/有限元分析/磁流体动力学/灭弧Key words
protection gap/integrated lightning protection gap/finite element analysis/magnetohydrodynamics/arc-extinguishing分类
信息技术与安全科学引用本文复制引用
周慧康,杨廷方,罗屹豪,易维,谢泽龙,王润璞,单淞译..基于气吹原理的一体化防雷间隙快速灭弧方法[J].南方电网技术,2023,17(12):119-126,151,9.基金项目
国家自然科学基金资助项目(51777015). Supported by the National Natural Science Foundation of China(51777015). （51777015）
