摘要
随着变电站通信技术的发展,5G基站天线布置于变电站主设备区附近,不可避免地对站内二次设备产生电磁干扰问题。为此分析了变电站内5G基站天线对二次设备电磁干扰的机理,建立了5G基站天线的辐射场数学模型并推导了其场源表征公式。同时结合电磁散射理论,提出了5G基站天线辐射下变电站电气大尺寸金属设备在空间散射场的数学模型。经河南500 kV官渡变电站5G天线在变电站内场强分布实验测试,验证了算法的准确性。最后,研究了5G基站天线不同工作频率、发射功率和下倾角对二次设备处电场强度的影响规律,计算结果表明,基站天线发射功率和下倾角明显改变二次设备处电场强度,最大可达12.92 V/m,超过电磁兼容抗扰度阈值。
With the development of communication technology, the antenna of 5 G base station is arranged near the main equipment area in the substation, which will inevitably cause electromagnetic interference to the secondary equipment in the substation. Therefore, the mechanism of electromagnetic interference from 5 G base station antenna to secondary equipment in the substation analyzed in this paper, the mathematical model of radiation field of 5 G base station antenna is established and its field source characterization formula deduced. Meanwhile, combined with the electromagnetic scattering theory, a mathematical model of the spatial scattering field of electrical large-scale metal equipment in substations under the radiation of 5 G base station antennas is proposed. The field strength distribution experiment test of 5 G antenna in Henan 500 kV Guandu Substation verifies the accuracy of the algorithm. Finally, the influence of different operating frequencies, transmission power and downtilt angles of 5 G base station antennas on the electric field strength at the secondary equipment is studied. The calculation results show that the base station antenna transmitting power and downtilt angle significantly change the electric field strength at the secondary equipment, and the maximum can reach 12.92 V/m, exceeding the electromagnetic compatibility immunity threshold.
作者
李枫航
唐波
齐道坤
刘兴发
匡宇来
谢黄海
LI Fenghang;TANG Bo;QI Daokun;LIU Xingfa;KUANG Yulai;XIE Huanghai(College of Electronic Engineering&New Energy,Three Gorges University,Hubei,Yichang 443002,China;Hubei Provincial Engineering Technology Research Center for Power Transmission Line,Hubei,Yichang 443002,China;State Grid Henan Economic Research Institute,Zhengzhou 450052,China;State Grid Electric Power Research Institute,Wuhan 430074,China)
出处
《南方电网技术》
CSCD
北大核心
2021年第10期111-117,共7页
Southern Power System Technology
基金
国家电网公司总部科技项目(5217L021000X)。
关键词
变电站
5G基站天线
二次设备
电磁干扰
电磁散射
substation
5G base station antenna
secondary equipment
electromagnetic interference
electromagnetic scattering
