35 kV输电线路灭弧间隙的仿真分析与试验  

Simulation analysis and experimental research on arc-extinguishing gap of 35 kV transmission line

作　　者：孔佳琦 夏志坚 王巨丰[1] 陈舒婷 KONG Jiaqi;XIA Zhijian;WANG Jufeng;CHEN Shuting(College of Electrical Engineering, Guangxi University, Nanning 530004, China;Fuzhou Power Supply Branch of State Grid Jiangxi Electric Power Co.,Ltd., Fuzhou 344000, China;Guangxi Power Grid Company Limited Beihai Power Supply Bureau, Beihai 536000, China)

机构地区：[1]广西大学电气工程学院,广西南宁530004 [2]国网江西省电力有限公司抚州供电分公司,江西抚州344000 [3]广西电网有限责任公司北海供电局,广西北海536000

出　　处：《电力科学与技术学报》2022年第1期202-210,共9页Journal of Electric Power Science And Technology

基　　金：广西创新驱动和发展撰写资金项目(AA18242050)。

摘　　要：为解决35 kV输电线路普遍存在的雷害问题,提出一种新型灭弧防雷间隙(NALPG)装置。首先,为验证装置的可行性,论述装置的熄弧原理,研究电弧发展和熄灭的机理,并借助电磁暂态计算软件(EMTP)搭建雷击35 kV输电线路模型来分析装置熄弧之后的暂态运行过程。通过仿真得知NALPG具有降低雷击过电压和削减谐波分量的能力。紧接着构建试验电路进行工频电弧截断试验,得到整个熄弧时间仅需4.0 ms,且一段时间内电弧未重燃。防雷改造NALPG的实际挂网运行效果优异。In order to solve the general lightning problems of 35 kV transmission lines,a new arc-extinguishing and lightning protection gap(NALPG)is proposed in this article.So as to verify the feasibility of the device,the principle of arc extinction of the device is discussed,and the mechanism of arc development and extinction is studied.Meanwhile,the electromagnetic transient calculation software is applied to build a 35 kV transmission line model of lightning strike to analyze the transient process of the device after arc quenching.Simulation results show that NALPG has the ability to reduce lightning overvoltage and harmonic components.Then,experimental circuit is constructed to conduct power frequency arc cut off test.The test results show that the entire arc extinction time is only 4.0 ms and the arc does not reignite for a period of time.Until now,the actual lightning protection effect of NALPG shows excellent results in line operation.

关 键 词：输电线路 新型灭弧防雷间隙 电磁暂态计算软件 雷击过电压 谐波 

分 类 号：TM863[电气工程—高电压与绝缘技术]