短间隙下不同避雷针接闪性能试验研究  

Research on Flashover Characteristics of Different Lightning Rods under Short Gap

作　　者：黄强[1] 许顺凯 彭向阳 王锐 文豹 王羽[1] 黄顺勇 HUANG Qiang;XU Shun-kai;PENG Xiang-yang;WANG Rui;WEN Bao;WANG Yu;HUANG Shun-yong(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China)

机构地区：[1]武汉大学电气与自动化学院,湖北武汉430072 [2]广东电网有限责任公司电力科学研究院,广东广州510080

出　　处：《水电能源科学》2020年第10期163-166,共4页Water Resources and Power

摘　　要：为探究不同避雷针在短间隙下的接闪特性,采用-250/2500μs冲击电压波分别对全尺寸和缩小比例的可控放电避雷针、传统避雷针、普通避雷针进行间隙距离分别为0.3、0.6、0.9、1.2m的放电特性试验,采用升降法获取了不同避雷针的间隙放电电压参数和光学影像。结果表明,间隙距离为1.2m时,避雷针的50%放电电压的大小关系为普通避雷针>传统避雷针>可控放电避雷针,即在相同试验条件下可控放电避雷针更易于发生接闪。此外,为更加直观地比较不同避雷针在放电能力上的差异性,设计了双避雷针选择性放电试验,每组试验放电40次,发现可控放电避雷针的接闪概率分别为传统避雷针、普通避雷针的1.86、4.00倍。In order to explore the lightning characteristics of different lightning rods under short gaps,the shock voltage wave with waveform parameter of-250/2500μs was used to test the discharge characteristics of controllable discharge lightning rod,traditional lightning rod and ordinary lightning rod under conditions of full-scale and drawdown ratio scale.In the test,the gap distance of the experiment was chosen as 0.3 m,0.6 m,0.9 mand 1.2 m,respectively.The gap discharge voltage and optical image of different lightning rods are obtained by the lifting method.The results of the single lightning rod gap discharge test show that when the gap distance is 1.2 m,the size relationship of the lightning rod for the50%discharge voltage is descending sort as ordinary lightning rod,traditional lightning rod,and controllable discharge lightning rod,that is,under the same test conditions,the controllable discharge lightning rod is more likely to flash.In order to compare the ability of different lightning rods,this paper designed a selective lightning discharge test for double lightning rods.Each group of test discharged 40 times,it found out that the probability of lightning strike of the controllable discharge lightning rod is 1.86 times that of the conventional lightning rod and four times that of the ordinary lightning rod.

关 键 词：冲击电压波 避雷针 接闪性能 缩比试验 升降法 放电电压 

分 类 号：TM727[电气工程—电力系统及自动化]