基于喷口射流的强气流灭弧防雷装置的分析与研究  

Analysis and Research of an Arc-extinguishing Lightning Protection Device With Strong Airflow Based on Nozzle Jet

作　　者：杨倩颖 李心如 YANG Qianying;LI Xinru(College of Electrical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学电气工程学院,广西南宁530004

出　　处：《电工技术》2021年第3期151-154,157,共5页Electric Engineering

基　　金：国家自然科学基金资助项目(编号51467002)。

摘　　要：多间隙强气流灭弧防雷装置可有效截断雷电弧,深度抑制工频电弧的发展和重燃。为进一步验证其性能,利用喷口射流原理分析耦合场的气流状态,并采用喷口射流衰减电弧模型描述电弧的耦合特性,同时在试验室环境下进行的灭弧试验与仿真结果基本吻合,证明了防雷装置动作迅速,产生的高速气流作用在雷电流衰减期,可在各喷口处将电弧截断,且电弧熄灭后不重燃。实际应用也表明,该装置安全可靠,大幅提升了输电线路防雷的有效性。Multi-chamber arc-extinguishing lightning protection device with strong airflow is able to intercept lightning arc effectively and can deeply inhibit the development of frequency arc.To further verify its performance,the flow state of the coupling field was analyzed by the principle of nozzle jet,and the coupling characteristics of arc were described by the model of nozzle jet attenuation arc.At the same time,the arc extinguishing test in the laboratory environment was basically consistent with the simulation results,which proved that the lightning protection device acted quickly,the high-speed air flow generated by the lightning current attenuation period could cut off the arc at each nozzle,and the arc would not ignite again after the arc was extinguished.Practical application also showed that the device was safe and reliable,which greatly improved the effectiveness of lightning protection for transmission lines.

关 键 词：高速气流 灭弧防雷装置 喷口射流 衰减电弧 灭弧时间 输电线路 

分 类 号：TM85[电气工程—高电压与绝缘技术]