邻近交流线路时直流输电线下混合电场的计算  

Hybrid Electric Field Calculation under AC-DC Parallel Transmission Line

作　　者：李铁鼎 黄欲成[1] 秦澔澔 

机构地区：[1]中南电力设计院,武汉市430071 [2]国网电力科学研究院,武汉市430074

出　　处：《电力建设》2015年第4期83-90,共8页Electric Power Construction

摘　　要：为了准确计算交直流并行输电线路线下混合电场,针对交流输电线路对直流导线表面电场的影响进行了分析,采用寻优算法优化模拟电荷位置,分析了直流导线表面电场随交流导线电压变化的情况。在考虑交流线路对直流线路空间离子轨迹影响的情况下,基于Deutsch假设计算了直流输电线路线下合成电场的瞬时最大值,提出了一种合理的假设,从而准确地计算了并行输电线路线下混合电场。最后分析了线路邻近间距对线下混合电场的影响。结果表明,交流输电线路对直流导线的起晕以及直流线下空间离子流场有较大影响,在计算时应予以考虑,交直流线路间距对直流线路线下混合电场有很大影响,在设计线路时应予以考虑。To accurately calculate the hybrid electric field under AC-DC parallel transmission lines,this paper analyzed the impact of AC transmission lines on the surface electric field of DC conductor,used optimization algorithm to optimize and simulate the charge location,and analyzed the change of the surface electric field of DC conductor w ith the voltage of AC conductor. Considering w ith the impact of AC transmission lines on the space ion trajectory of DC transmission lines,the maximum instantaneous value of total electric field under DC transmission lines w as calculated based on Deutsch hypothesis,and a reasonable assumption w as proposed to accurately calculate the hybrid electric field under AC-DC parallel transmission line. Finally,this paper analyzed the impact of line spacing on the hybrid electric field. The results show that AC transmission lines have a great influence on the corona and space ion flow field of DC conductor,w hich should be considered in the calculation; the spacing of AC / DC transmission lines also has a great influence on the hybrid electric field of DC transmission lines,w hich should be considered in the line design.

关 键 词：交直流并行输电线路 混合电场 导线表面场强 

分 类 号：TM154[电气工程—电工理论与新技术]