CAJ | 학술논문

直流输电线路离子流场的计算中,针对外加电压、导线半径、线路高度等线路结构参数对地表电磁环境影响的讨论已很成熟,但针对架空地线半径、位置等因素影响作用的理论分析却并不多见。为此,基于Deutsch假设,编制程序计算了双极导线垂直排列试验线路地表合成场强,并与试验数据进行了比对,结果表明一致性很好。基于三沪二回典型输电线路结构,计算了极导线4种不同布置方式下的地表合成场强以及离子流密度,选出电磁环境较优的＂＋-/＋-＂布置方式用于讨论架空地线对地表电磁环境的影响。结果表明,对于不同的输电线路高度,地表电磁环境随架空地线位置变化趋势一致,且受位置变化影响极小。因此,在线路杆塔设计中,考虑防雷要求对地线位置进行调整时,无需考虑地线位置变化对线路下方电磁环境的影响。
직류수전선로리자류장적계산중,침대외가전압、도선반경、선로고도등선로결구삼수대지표전자배경영향적토론이흔성숙,단침대가공지선반경、위치등인소영향작용적이론분석각병불다견。위차,기우Deutsch가설,편제정서계산료쌍겁도선수직배렬시험선로지표합성장강,병여시험수거진행료비대,결과표명일치성흔호。기우삼호이회전형수전선로결구,계산료겁도선4충불동포치방식하적지표합성장강이급리자류밀도,선출전자배경교우적＂＋-/＋-＂포치방식용우토론가공지선대지표전자배경적영향。결과표명,대우불동적수전선로고도,지표전자배경수가공지선위치변화추세일치,차수위치변화영향겁소。인차,재선로간탑설계중,고필방뢰요구대지선위치진행조정시,무수고필지선위치변화대선로하방전자배경적영향。
The impact of conductor configurations and structural parameters such as applied voltage,conductor radius,line height et al.on the electromagnetic environment have been widely discussed in the calculation of ion current field under HVDC transmission lines,while the influence of the radius and position of the overhead ground wire is rarely reported.Based on the Deutsch assumption,the lateral distribution of the electric field intensity at the ground level under vertical bipolar test line was calculated and was in good agreement with the measured data.The electric field intensity and ion current density were calculated for Sanhu double-circuit HVDC transmission line with four possible configuration respectively,the environment-friendly case of ＇＋-/＋-＇ arrangement was used to discuss the effect of the overhead ground wire.Calculation results show that the radius and position of the overhead ground wire has little effect on the ground level electromagnetic environment for every different transmission line heights.Therefore,in the design of the transmission tower,there is no need to consider the effect of the ground wire position on the ground level electromagnetic environment when its position required to be changed for lightning protection.