云南—广东±800kV特高压直流线路无线电干扰仿真计算与测试分析  

Analysis of Simulative Calculation and Measurement of Radio Interference from Yunnan—Guangdong ±800 kV UHVDC Transmission Lines

作　　者：邓军[1,2] 肖遥 楚金伟 李立浧[1] 赵宇明 张建功[4] 

机构地区：[1]华南理工大学电力学院,广州510640 [2]南方电网超高压输电公司检修试验中心,广州510663 [3]南方电网科学研究院,广州510080 [4]中国电力科学研究院,武汉430074

出　　处：《高电压技术》2013年第3期597-604,共8页High Voltage Engineering

基　　金：国家高技术研究发展计划(863计划)(2012AA050209)~~

摘　　要：为研究特高压直流输电线路无线电干扰特性及环境效应,开展了±800kV云南—广东(简称云广)直流线路无线电干扰的理论计算与现场测量。利用等效电荷法和国际无线电干扰特别委员会(CISPR)经验公式分别计算特高压直流输电线路导线表面最大电位梯度和无线电干扰分布,并将理论计算值与现场测量值进行比较。分析结果表明:随着测点距离负极导线距离的增加,负极半压、负极全压运行的无线电干扰呈逐渐减小的趋势;正极半压和负极全压运行的无线电干扰测量值变化平缓且大于负极半压运行的,但小于双极全压和负极全压运行的测量值;双极全压运行测量值与理论计算值的误差小于其他运行方式的,但当无线电干扰测点的导线对地高度为49m,或线路临近500kV交流输电线路,或海拔高度为1 900m时,双极全压运行的测量值与理论计算值的误差偏大;不同海拔下的云广特高压直流线路,在正极外20m至负极外20m之间,无线电干扰变化趋势是先减小后增大,该区域以外无线电干扰值呈衰减分布。因此,不同运行方式下受测量环境因素的影响无线电干扰的测量值与理论计算值的分布规律存在差异,但不同海拔高度下双极全压运行的无线电干扰测量值都满足电磁环境限值要求。In order to obtain the characteristic and environment effect of radio interference（RI） from UHVDC transmission lines,we carried out an analysis of the simulative calculation and measurement of RI based on ±800 kV Yunnan—Guangdong（YG） Transmission Project in China.The equivalent charge method and the empirical formula of International Special Committee on Radio Interference（CISPR） were employed to obtain the maximum potential gradient on conductor surface and the distribution of RI,respectively,and then the results were compared with measured value.According to the results,there was a gradually decreasing trend of RI for half-voltage and full-voltage negative-pole operation with the increasing distance between the measuring location and negative-pole conductors.Furthermore,the measured RI of half-voltage positive-pole and full-voltage negative-pole operations changed gradually,and it was greater than that of half-voltage negative-pole operation,but less than that of full-voltage negative-pole and bipolar operations.Moreover,though the error between the simulative calculation and measured RI for full-voltage bipolar operation was smaller in comparison with the other operation modes,the measured RI become slightly larger with a conductor height of 49 m,or a measuring location near 500 kV AC transmission lines,or an altitude height of 1 900 m.Finally,with increasing altitude heights,RI firstly increased and then decreased when the measuring location was in an area between the positive polar and negative polar with 20 m extending on both sides;meanwhile RI showed an attenuation trend in other locations.It is concluded that the difference in RI distribution between simulative calculation and measurement existed due to environmental factors;never the less all the RI of full-voltage of bipolar at different altitudes were within the electromagnetic environment standard limit.

关 键 词：特高压直流 输电线路 无线电干扰 电磁环境 高海拔地区 电晕效应 

分 类 号：TM743[电气工程—电力系统及自动化]