特高压交直流线路相互交叉时地面混合电场的计算研究  

Study on Calculation of Ground Mixed Electric Field When UHV AC and DC Transmission Lines Cross Each Other

作　　者：盛尊华 闫建兴 马云霄 SHENG Zunhua;YAN Jianxing;MA Yunxiao(Power China Hebei Electric Power Design&Research Institute Co.,Ltd.,Shijiazhuang,Hebei 050031,China)

机构地区：[1]中国电建集团河北省电力勘测设计研究院有限公司,河北石家庄050031

出　　处：《山西电力》2022年第2期7-10,共4页Shanxi Electric Power

摘　　要：采用特征线法研究了特高压交直流线路相互交跨时的三维地面混合电场和离子流密度,经与在运线路的地面混合电场和离子流密度实测结果对比,计算结果与实测结果基本一致。分别计算了交流在上和直流在上2种1000 kV和±800 kV线路相互交跨方式三维地面混合电场分布情况。计算结果表明,地面电场的分布受上层线路的影响很小,这不仅是因为下层线路位置较低,也是因为下层线路地线的屏蔽效应以及上层线路对地距离较大。With the method of characteristics,3-D(three-dimensional)ground mixed electric field and ion current density of UHV AC/DC lines crossing each other are studied.The results are compared with the measured results of ground mixed electric field and ion current density of operating lines and the calculated results are mainly consistent with the measured results.The distribution of 3-D ground mixed electric field of 1000 kV and ±800 kV transmission lines crossing each other with AC on top and DC on top is calculated respectively.The results show that the distribution of ground electric field is little affected by the upper transmission lines,which is not only because of the lower position of lower transmission lines,but also because of the shielding effect of the ground wire of the lower transmission lines and the comparatively larger impact of the distance between upper transmission lines and the ground.

关 键 词：混合电场 交流特高压 直流特高压 交叉跨越 

分 类 号：TM726[电气工程—电力系统及自动化]