共享铁塔电磁环境影响及防雷接地技术研究Study on Electromagnetic Environment Effects and Lightning Protection Grounding Technology of Shared Towers
张洲,曹枚根,龚坚刚,刘欣博,楼佳悦
ZHANG Zhou,CAO Meigen,GONG Jiangang,LIU Xinbo,LOU Jiayue
摘要(Abstract):
随着5G通信技术的蓬勃发展,越来越多的电力铁塔用作共享铁塔架设通信基站。应用共享电力铁塔需保证通信信号可靠传输,使其不受电磁场和雷电的影响。对此,分析了猫头塔、干字型塔、羊头塔和鼓型塔4种典型铁塔在110 k V, 220 k V及500 k V电压条件下3种天线搭载位置的电磁场强度,为减小电磁场对通信传输的干扰,给出了不同塔型铁塔的天线搭载位置优选方案;研究了共享铁塔防雷接地问题,分别提出了天线在3类搭载位置时共享铁塔的防雷保护方案;给出了共享铁塔地网的改造方案,使得接地电阻同时满足电力系统和通信系统的双重要求,并在此基础上优化了接地电阻计算公式。相关研究成果普适性强,对我国输电铁塔的共建共享具有很好的参考价值。
With the vigorous development of 5G technology, more and more transmission towers are used as shared towers to mount communication base stations. Reliability of communication signal transmission must be assured free of electromagnetic field and lightning effects. Therefore, the paper analyzes electromagnetic field intensity of three antenna mounting positions respectively on the cat-head type tower, "JG" type tower,sheep-head tower and drum tower under the voltage levels of 110 kV, 220 kV, and 500 kV; an optimal selection method for antenna installation position is proposed to reduce the interference of electromagnetic field on communication signal transmission. The lightning protection grounding of shared towers is studied, through which proper lightning protection schemes of antennas in the three mounting positions are proposed. Simultaneously, the grounding network reconstruction scheme of the shared tower is given so that the grounding resistance can meet the requirements of both electric system and communication system, based on which the calculation formula of grounding resistance is optimized. The results are highly universal and have substantial reference value for the co-construction and sharing of transmission steel towers in China.
关键词(KeyWords):
共享铁塔;通信;电磁环境;防雷保护;接地电阻
shared tower;communication;electromagnetic environment;lightning protection;grounding resistance
基金项目(Foundation): 国网浙江省电力有限公司2019年集体企业科技项目(ZJJTQY2019)
作者(Author):
张洲,曹枚根,龚坚刚,刘欣博,楼佳悦
ZHANG Zhou,CAO Meigen,GONG Jiangang,LIU Xinbo,LOU Jiayue
DOI: 10.19585/j.zjdl.202010001
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- 共享铁塔
- 通信
- 电磁环境
- 防雷保护
- 接地电阻
shared tower - communication
- electromagnetic environment
- lightning protection
- grounding resistance