高压输电线路共享杆塔的5G通信设备表面电场计算方法  

Calculation Method of Electric Field Around 5G Communication Equipment Installed on High Voltage Transmission Tower

作　　者：李本良 李显鑫 侯树政 田蔚光 王旭阳 LI Benliang;LI Xianxin;HOU Shuzheng;TIAN Weiguang;WANG Xuyang(State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 102209,China;State Key Lab of Control and Simulation of Power Systems and Generation Equipment(Department of Electrical Engineering,Tsinghua University),Beijing 100084,China)

机构地区：[1]国网经济技术研究院有限公司,北京102209 [2]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京100084

出　　处：《南方电网技术》2021年第10期65-71,共7页Southern Power System Technology

基　　金：国家电网公司总部科技项目(5200-202056141A-0-0-00)。

摘　　要：为实现资源共享,现将5G通信设备与输电杆塔共址,需要考虑通信设备安装位置电场的影响。对于输电线在距离杆塔表面处产生的电场计算,若直接使用模拟电荷法,会出现较大误差,采用有限元方法则可以充分考虑杆塔表面复杂结构对电场的影响。然而输电线电场为开域场,且导线与杆塔的尺寸相差较大,有限元网格划分困难,计算量大且效率低。针对这种场景,采用模拟电荷和有限元结合的方法,将开域场截断为一个较小的长方体区域,先通过模拟电荷法计算得到长方体边界面上的电位分布,再将边界面上电位施加到有限元仿真软件COMSOL中,利用有限元方法计算杆塔表面电场。共享杆塔实际案例验证了该计算方法的正确性。所提计算方法可以在保证计算准确性的前提下,减少有限元仿真计算量,适用于各电压等级杆塔表面的电场计算。In order to realize resource sharing, 5 G communication equipment install on transmission tower, and the influence of electric field on the position of communication equipment should be considered. For the electric field calculation at the place around the surface of the transmission tower, the direct use of the charge simulation method(CSM)will have a large error. The finite element method(FEM) can fully consider the influence of the complex structure on the electric field. However, the electric field of transmission lines is open field, and the size difference between the conductor and tower is large, the finite elements mesh division is difficult, the calculation is large and the efficiency is low. In this case, the open field is cut into a small rectangular region by combining CSM and FEM. The potential distribution on the boundary of the cuboid is calculated by the CSM. Then the potential on the boundary interface is applied to COMSOL, and the surface electric field of the tower is calculated by the FEM. The calculation method is verified by the practical case of shared transmission tower. The method can reduce the amount of FEM simulation calculation on the premise of ensuring the accuracy of calculation, and it is suitable for the calculation of electric field on the surface of each voltage level transmission tower.

关 键 词：模拟电荷法 有限元方法 输电杆塔 输电线路 电场 

分 类 号：TM721[电气工程—电力系统及自动化]