摘要
在5G基站天线辐射下,变电站内密集分布的电气设备由于耦合作用而产生强烈的二次散射现象,这不可避免地对变电站内电磁散射场的求解造成影响。为此,在传统单个电大尺寸目标电磁散射场求解的基础上,考虑多个散射体间的电磁耦合效应,提出变电站内大量金属设备阵列背景下任一点空间散射场的求解算法。首先,对变电站电气设备进行分区,考虑每个区域中10倍波长范围内设备之间的电磁耦合,从而划分出需要考虑耦合的设备集群;然后,在划分的设备集群中,根据散射电场的场源互易关系,推导邻近两设备间二次散射场的电场积分方程。将5G基站天线产生的一次散射场与因耦合效应产生的二次散射场进行矢量叠加,最终获得变电站电气设备集群耦合的空间散射场。以500 kV官渡变电站为算例,考虑站内设备耦合计算的电场强度与实际测量值的平均误差为6.39%,而不考虑设备耦合算法的平均误差值为43.64%,该文算法可实现5G基站天线辐射下,变电站内电磁散射场的精确求解。
Under the irradiation of the 5G base station antenna,the densely distributed electrical equipment in the substation will produce strong secondary scattering phenomenon due to the coupling effect,which inevitably affects the solution of the electromagnetic scattering field in the substation.Therefore,on the basis of solving the electromagnetic scattering field of a single target,and considering the electromagnetic coupling effect between multiple scatterers,a spatial scattering field solving algorithm for any point in the background of a large number of metal equipment arrays in substations is proposed.First,the electrical equipment of the substation is partitioned,taking into account the mutual coupling between devices within a range of 10 times of the electromagnetic waves length in each area,in order to identify the device clusters that need to be considered for coupling.Then in the divided equipment cluster,the electric field equation of the secondary scattering field between two adjacent sets of equipment is derived according to the field and source reciprocity relationship of the scattering electric field.By superimposing the primary scattering field generated by the 5G base station antenna and the secondary scattering field generated by coupling effect,the spatial scattering field of the electrical equipment cluster coupling in the substation is finally obtained.Taking the 500 kV Guandu substation as an example,the average error between the calculated and measured electromagnetic scattering field values after considering the mutual coupling of electrical equipment in the substation is 6.39%,while the average error value without considering the equipment coupling algorithm is 43.64%.This algorithm achieves accurate solution of electromagnetic scattering field in substations under the radiation of 5G base station antenna.
作者
唐波
张龙斌
张灿
尚智宇
王丰
TANG Bo;ZHANG Longbin;ZHANG Can;SHANG Zhiyu;WANG Feng(Hubei Provincial Engineering Technology Research Center for Power Transmission Line(China Three Gorges University),Yichang 443002,Hubei Province,China;College of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,Hubei Province,China;State Grid Hengyang Power Supply Company,Hengyang 421200,Hunan Province,China)
出处
《中国电机工程学报》
北大核心
2025年第3期1172-1181,I0031,共11页
PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING
基金
国家电网有限公司科技项目(5217L021000X)。
关键词
5G基站天线
变电站
二次散射
耦合效应
互易定理
5G base station antenna
substation
secondary scattering
coupling effect
reciprocity theorem
