冲击气流灭弧防雷装置的实验研究  

Experimental Research of Arc-Extinguishing Lightning Protection Device Under Impact Airflow

作　　者：王学彬 王巨丰[1] 丰德 WANG Xuebin;WANG Jufeng;FENG De(College of Electrical Engineering,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学电气工程学院,南宁530004

出　　处：《电瓷避雷器》2018年第4期44-48,共5页Insulators and Surge Arresters

基　　金：国家自然科学基金资助项目(编号:50867002)

摘　　要：为提高输电线路的防雷水平,降低跳闸率,介绍了一种利用高速冲击气流截断电弧的防雷灭弧装置。装置与绝缘子串并联,可将雷电通道引向并联间隙,利用雷电信号触发产气装置,高速的冲击气流将后续工频电弧熄灭。灭弧实验表明:气流可在3~5 ms内将电弧熄灭,时间远低于继电保护的响应时间,避免了雷击跳闸。速度实验表明:冲击气流速度越大,灭弧效果越好,当气流速度达到500 m/s以上时,灭弧率达87%以上,是比较理想的灭弧效果。该装置在现场运行良好,验证了其有效性和实用性。To enhance the lightning proof ability of transmission lines,a new-style arc-extinguish-ing lightning protection device using high-speed impact airflow to cut off arc is introduced. The deviceand the insulator string are connected in parallel,and the lightning channel can be led to the parallelgap. The lightning signal triggers the air production device,and the high-speed impact air flow extin-guishes the subsequent power frequency arc. The arc-extinguishing tests indicate that the power frequen-cy arc can be extinguished within 3-5 ms and the duration is much shorter than the response time of relayprotection,thus the lightning trip-out of transmission line can be effetely prevented. The speed test indi-cates that the greater the airflow velocity,the greater arc-extinguishing effectiveness will be. The arc-ex-tinguishing rate is more than 87% when the speed of airflow is more than 500 m/s,which is nearly the ide-al result of arc-extinguishing. The device is running well in field operation situation,proving it to be ef-fective and practicable.

关 键 词：冲击气流 灭弧防雷装置 灭弧实验 响应时间 速度实验 

分 类 号：TM863[电气工程—高电压与绝缘技术]