多断点强气吹条件下改善变电站进线段防雷效果的仿真试验分析  

Simulation Test Analysis on Improving Lightning Protection Effect of Substation Incoming Line Segment under Multiple-breakpoints Strong Air Blowing Condition

作　　者：孔佳琦 夏志坚 陈舒婷 KONG Jia-qi;XIA Zhi-jian;CHEN Shu-ting(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：《电气开关》2020年第5期78-83,93,共7页Electric Switchgear

摘　　要：为了解决变电站进线段雷害难题,目前研制了一种可运用于35kV变电站进线段的多断点灭弧防雷间隙装置(MALPGD)。笔者阐述了灭弧装置原理,建立了纵吹气流作用下电弧的数学模型,分析了电弧熄灭特性,在建模分析的基础上,得到变电站进线段的保护方案并利用ATP-EMTP仿真软件分析得出灭弧装置可以有效衰减变电站进线段入侵波,衰减幅值接近50%。在高压实验室的条件下进行灭弧试验,其灭弧时间为0.3ms,且灭弧装置降低电弧电压幅值超过50%。最终论证了所提保护方案具有一定的科学性。In order to solve the problem of lightning damage in the incoming line segment of the substation,we de-veloped a device which is a multiple-breakpoints arc-extinguishing lightning protection gap device(MALPGD)for the line segment of the 35kV substation.The author describe the principle of arc-extinguishing device,and establish the mathematical model of arc under the action of longitudinal blowing airflow.And then we analyze the arc extinc-tion characteristics.Under the modeling analysis,we get the protection scheme of the substation incoming line seg-ment and analyze that the arc extinguishing device can effectively attenuate the intrusion wave of the substation in-coming line segment by using ATP-EMTP simulation software.The result shows that the amplitude attenuation of the intrusion wave is close to 50%.Under the high pressure laboratory conditions,the experimental results show that the high speed airflow can extinguish the arc at 0.3ms.The arc-extinguishing device reduces the arc voltage amplitude by more than 50%.In the end,simulation and test results effectively demonstrate that the proposed protection scheme is scientific.

关 键 词：变电站进线段 多断点 灭弧防雷装置 纵吹气流 入侵波 灭弧时间 

分 类 号：TM63[电气工程—电力系统及自动化]