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.
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)
出处
《电气开关》
2020年第5期78-83,93,共7页
Electric Switchgear
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
incoming line segment of the substation
multiple-breakpoints
arc-extinguishing lightning protection device
longitudinal blowing airflow
intrusion wave
extinction time
