±800kV与±500kV同塔双回直流输电线路电磁环境研究  

Research on Electromagnetic Environment of ±800 kV and ±500 kV Double-Circuit DC Transmission Lines on the Same Tower

作　　者：吴高波 李健 陈媛 罗楚军 汪如松 林芳 

机构地区：[1]中南电力设计院有限公司,湖北省武汉市430071

出　　处：《电网技术》2015年第9期2532-2538,共7页Power System Technology

摘　　要：±800 k V与±500 k V同塔双回直流输电线路可有效提高输电走廊的利用效率,但目前尚无设计和建设经验。针对电磁环境这一重要技术问题,基于Deutsch假设、经验公式分别计算了±800 k V与±500 k V同塔双回直流输电线路不同塔型和极导线布置方式下的地面合成场强和离子流密度、无线电干扰和可听噪声。结果表明:±500 k V线路布置于杆塔下层要求的最小对地高度较小;极导线同极异侧布置要求的走廊宽度较小,但可听噪声相对较高。计算分析了导线型号、线间距离和导线对地高度对电磁环境参数的影响,结果可为±800 k V与±500 k V同塔双回直流输电线路的工程设计提供参考。There is no experience in design and construction of ±800 k V and ±500 k V double-circuit DC transmission lines on the same tower, which improves utilization rate of the power transmission corridor effectively. For electromagnetic environmental problem, the total electric field, ion current density, radio interference and audible noise under different types of towers and conductor arrangements are calculated based on Deutsch assumption and empirical formulas. The results show that the required line-to-ground height is smaller while ±500 k V line are arranged on the lower arm, the required width of corridor is narrower but the audible noise is higher when the same polarity are arranged on different side. The electromagnetic environment is also analyzed under different conductor types, conductor distances and height to ground, and the results provide reference for project design.

关 键 词：电磁环境 合成场强 无线电干扰 可听噪声 同塔双回直流输电线路 

分 类 号：TM72[电气工程—电力系统及自动化]