±800 kV与±500 kV同塔双回线路不同塔型布置的电磁环境  

Research on Electromagnetic Environment of ±800 kV and ±500 kV Double-Circuit DC Transmission Lines with Different Tower Configurations

作　　者：李凌燕[1] 陈媛[2] 杜志叶[1] 李健[2] 阮江军[1] 黄国栋[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]中南电力设计院,湖北武汉430071

出　　处：《中国电力》2015年第10期65-70,共6页Electric Power

基　　金：国家自然科学基金资助项目(51477120);国家重点基础研究发展计划(973计划)资助项目(2011CB209404)~~

摘　　要：±800 k V与±500 k V同塔混压双回直流输电线路可有效解决日益增长的电力需求和输电走廊资源紧缺的矛盾,但该输电线路目前尚无设计与运行经验,研究其塔型布置型式对线路设计至关重要。采用上流有限元等方法研究了4种基本塔型在相应导线布置方式下的电磁环境,计算了地面电场和离子流密度、可听噪声和无线电干扰以及线路最小对地距离和走廊宽度,并基于电磁环境限值要求对各塔头临界尺寸进行了对比分析。根据综合比较结果,推荐了±800 k V与±500 k V同塔双回直流线路的最优塔型布置方案,并在推荐塔型布置下研究了线路在不同运行工况下的电磁环境,可为工程实际提供参考。±800 kV and ±500 kV Mixed-Voltage double-circuit DC transmission lines can be considered for solving the contradiction between growing electricity demand and limited line corridor. However, without previous design and operation experience, it is of great significance to study tower configurations during lines design. The electromagnetic environment of four tower types with corresponding pole arrangements are investigated by upstream finite element method. Indicators such as total electric field and ion flow density at ground level, radio interference and audible noise, minimum line height and line corridor width are calculated. Furthermore, tower size threshold is analyzed and compared based on electromagnetic environment limits. According to comprehensive comparison, optimal tower configuration of ±800 kV and ±500 kV double-circuit DC transmission lines is suggested. The electromagnetic environment of the recommended tower under different operating conditions is analyzed, which can provide reference for engineering practice.

关 键 词：直流输电线路 同塔混压 上流有限元法 塔型布置 电磁环境 

分 类 号：TM75[电气工程—电力系统及自动化]