共享铁塔防雷接地可靠性研究  

Reliability of Lightning Protection and Grounding of Shared Tower

作　　者：刘蕊 齐道坤 莫娟 马龙[3] 王璐 LIU Rui;QI Daokun;MO Juan;MA Long;WANG Lu(China Electric Science Research Institute Co.,Ltd.,Beijing 100055,China;State Grid Economic and Technological Research Institute of Henan Province,Zhengzhou 450000,China;Electricity Department of North China Electric Power University,Baoding 071003,China;North China Electric Power University Science&Technology College,Baoding 071051,China)

机构地区：[1]中国电力科学研究院有限公司,北京100055 [2]国网河南省电力公司经济技术研究院,郑州450000 [3]华北电力大学电力系,河北保定071003 [4]华北电力大学科技学院,河北保定071051

出　　处：《电瓷避雷器》2021年第6期125-132,共8页Insulators and Surge Arresters

摘　　要：共享铁塔是在电力杆塔上加装通信设备,然而电力系统和通信系统的容量、电压等级等相差较大,两者之间的相互作用不可忽略。为获取共享铁塔接地装置暂态性能,本研究参照220 kV电力铁塔和移动通信机房接地装置图纸,建立了铁塔地网和通信机房地网不同连接方式,不同连接点个数,电缆不同连接方式情况下雷击共享铁塔的暂态计算模型,研究共享铁塔遭受雷击时接地网防雷可靠性。通过分析地电位分布情况及电缆电磁骚扰情况,得到出重要结论:若考虑降低接地网的暂态地电位升峰值,宜采取两地网间距10 m;若从共享铁塔接地网的均衡性能角度出发,宜采用将通信机房置于塔下的接地方式。Shared tower is to install communication equipment on the power tower. However, the capacity and voltage level beween power system and communication system are quite different, so the interaction between them can not be ignored. In order to obtain the transient performance of the grounding device of the shared tower, referring to the drawings of the grounding device of the 220 kV power tower and the mobile communication room, the author establishes the transient calculation model of the grounding system of the tower and the communication room under different connection modes, different number of connection points and different cable connection modes, and studies the lightning protection reliability of the grounding system when the shared tower is struck by lightning. Based on the analysis of the distribution of ground potential and the electromagnetic disturbance of cables, it is concluded that if the peak value of transient ground potential rise of the grounding network is to be reduced, the distance between the two networks should be 10 m;if the balance performance of the grounding network of the shared tower is to be considered, the communication room should be placed under the tower.

关 键 词：共享铁塔 雷击 接地方式 地电位升 电磁骚扰 

分 类 号：TM863[电气工程—高电压与绝缘技术]