配电线路混凝土杆塔接地体冲击特性实验研究  

Experimental Study on Impulse Characteristics of Concrete Tower Grounding Body of Distribution Line

作　　者：王琨 WANG Kun(Xi'an Power Supply Company of State Grid Shaanxi Electric Power Company,Xi'an 710500,China)

机构地区：[1]国网陕西省电力公司西安供电公司,西安710500

出　　处：《电瓷避雷器》2023年第1期172-178,共7页Insulators and Surge Arresters

摘　　要：为了分析雷击配电线路杆塔时的冲击特性,选择实地试验的方式进行测量工作,同时为了增加试验的可靠性及对比不同土壤电阻率环境下的杆塔冲击特性,在陕西省某地选择了两处不同土壤电阻率的同类钢筋混凝土材质杆塔进行测试,选择移动式冲击电流发生器作为本次试验的激励装置,采用三级法布线方式,测量得到了4种不同幅值的冲击电流下的杆塔接地体表面电位及杆塔周围地电位升的数据。本次试验属于配电线路杆塔防雷任务的基础研究工作,测量得到的杆塔接地体冲击特性数据及电位分布规律可以指导此类钢筋混凝土材质类型的配电线路杆塔本体及接地体优化设计工作,降低配电线路的雷击致故障概率。In order to analyze the impact characteristics of lightning strike distribution line towers,select the field test method for measurement,and also to increase the reliability of the test and compare the impact characteristics of towers under different soil resistivity environment,two similar reinforced concrete towers with different soil resistivity were tested in a certain area of Shaanxi Province.Mobile impulse current generator was used as the excitation device in the test.The generator adopts three-stage wiring method to measure the surface potential of tower grounding body and the rise of ground potential around the tower under the impulse current of four different amplitudes.This test is the basic research work of the lightning protection task of the distribution line tower.The measured impact characteristic data and potential distribution law of the tower grounding body can guide the optimization design of the distribution line tower body and grounding body of this type of reinforced concrete material and reduce the lightning failure probability of the distribution line,which has the significance of engineering practice.

关 键 词：配电线路 防雷 接地体 冲击特性 混凝土杆塔 三级法 冲击电流发生器 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM75