交直流同走廊输电线路地面电场研究

Research on the Total Electric Field Under HVAC-HVDC Ajacent-tower Hybrid Transmission Lines

研究交直流同走廊输电线路的地面电场对于评估输电线路周围的电磁环境具有重要意义。然而目前的研究中多不考虑交直流导线电荷间的相互影响。采用计及此相互影响的方法计算交直流同走廊的地面电场。实例对比表明本文算法可靠。在此基础上,进一步分析了子导线半径、子导线分裂数、天气状况和导线空间布置方式的影响。结果表明:增加子导线半径,增大子导线分裂数,采用直流线路正极性靠近交流线路的空间结构等措施均可以有效减小同走廊输电线路空间电场;雨天时的地面电场显著增加,应予特别关注。

The analysis on the total electric field under the HVAC-HVDC ajacent-tower hybrid transmission lines plays an important role in evaluating the electromagnetic environment nearby. However, few existing research considers the mutual effect of HVAC- HVDC hybrid transmission lines. This paper which considers the mutual effect calculates the total electric field. By comparing the re-sults generated by the calculation with those in published literature, we consider the program reliable. This paper analyzes the influ-ence of sub-conductor radius, sub-conductor splitting number, weather condition and space arrangement of lines. The results show that the total electric field can be effectively reduced by increasing the radius, increasing the splitting number, using the space arrange-ment with the positive polar closing to AC line. A significant increase in the total electric field on rainy condition should be given spe-cial attention.