1．北京航空航天大学 电气工程系，北京市 海淀区 100083； 2．中国电力科学研究院，北京市 海淀区 100192

根据极导线垂直和水平排列高压直流输电线路几何结构的特点，在考虑正、负极导线起晕场强不同和正、负离子不同迁移率的基础上，比较分析了极导线垂直和水平排列±500 kV直流输电线路的电磁环境特点。结果表明：相对于极间距和极导线对地最小高度分别相同的水平排列线路，负极导线在下的垂直排列线路的地面合成电场强度、空间电荷密度和离子流密度的最大值较大，无线电干扰电平和可听噪声水平较低；而正极导线在下的垂直排列线路的地面合成电场强度、空间电荷密度和离子流密度的最大值较小，但其无线电干扰电平和可听噪声水平较高。

高压直流输电线路   极导线垂直和水平排列   合成电场强度   无线电干扰   可听噪声

According to the geometry configuration characteristics of HVDC transmission lines with vertical and horizontal pole arrangements, on the basis of considering different corona onset field strengths of positive and negative poles as well as different mobilities of positive and negative ions, the comparative analysis on the electromagnetic environmental characteristics of ±500kV DC transmission lines with vertical and horizontal pole arrangements is performed. Research results are shown as follows. For the same pole spacing and the same minimal attitude of pole above ground, comparing with transmission lines with horizontal pole arrangement, the total electric field strength at ground level, space charge density and ion current density of transmission lines with vertical pole arrangement and the lower negative pole possess larger maximal values, and radio interference level and audio noise level of this type of lines are lower; whereas the total electric field strength at ground level, space charge density and ion current density of transmission lines with vertical pole arrangement and the lower positive pole possess smaller maximal values, and radio interference level and audio noise level of this type of lines are higher.

HVDC transmission lines   vertical and horizontal pole arrangements   total electric field strength   radio interference   audible noise