特高压直流输电铁塔附近三维电场仿真计算  

Simulation and calculation of the three dimensional electric field near UHVDC power transmission tower

作　　者：秦澔澔 李阳阳 彭涛 QIN Haohao;LI Yangyang;PENG Tao(Wuhan NARI Limited Liability Company,State Grid Electric Power Research Institute,Wuhan 430074,China;Wuhan Jingce Electronic Group Co.,Ltd.,Wuhan 430072,China;State Grid Hubei Electric Power Company,Wuhan 430077,China)

机构地区：[1]国网电力科学研究院武汉南瑞有限责任公司,湖北武汉430074 [2]武汉精测电子集团股份有限公司,湖北武汉430072 [3]国网湖北省电力公司,湖北武汉430077

出　　处：《电气应用》2022年第6期16-22,共7页Electrotechnical Application

摘　　要：随着越来越多的输电线路穿越人口密集区,人们对电磁环境的关注不断增强,尽管国内外对输电线路电磁环境已有很多研究,但对输电用铁塔周边的电场分析计算却未曾见诸报道。为了实现对输电线路电磁环境的准确评估,基于Deutsch假设的解析方法,结合线单元模拟电荷法及悬链线方程,通过搭建三维铁塔计算模型,提出了特高压直流输电用铁塔周边的电场三维计算方法,计算了±800 kV特高压直流输电线路铁塔附近的地面合成电场强度,通过与现场实测数据的比较,证明了模型和算法的有效性。通过与忽略铁塔影响时的计算结果进行对比,分析了铁塔对地面电场的影响。研究结果表明:铁塔对其下方的地面电场强度削弱近30%,在塔基部的电场强度有明显畸变,铁塔对其附近电场的影响距离与塔基尺寸呈正相关,近似于塔基边长的1.5倍。In order to accurately calculate the ground electric field near the UHVDC power transmission tower,based on actual structure of tower and the equation of transmission lines,a three-dimensional model to compute the total electric field near tower is built,According to the charge simulation method and the assumption of Deutsch,the total ground electric field near ±800 kV tower is calculated.By comparison with the measured data,the validity of the model and algorithm is proved.Research results show that there is a certain shielding effect of transmission tower on ground surface electric field,so the electric field intensity beneath the tower decreases obviously.The electric field has clear distortion at the positions where metal frameworks are erected.

关 键 词：线单元模拟电荷法 三维铁塔模型 Deutsch假设 地面合成电场 铁塔影响距离 

分 类 号：TM721.1[电气工程—电力系统及自动化]