±500kV柔性直流同塔三回架空导线布置方式

Conductors Arrangement of ±500kV VSC-DC Overhead Line with Three Circuits on the Same Tower

直流输电线路的导线布置对线路的电磁环境、走廊宽度和防雷性能等具有重要影响,很大程度上决定着线路的技术经济性。本文通过±500kV柔性直流同塔三回导线(含3组金属回线)的不同布置方式,采用有限元法计算电磁环境,行波法和击距法计算耐雷性能。经过技术经济分析,提出±500kV柔性直流同塔三回极导线采用垂直布置、金属回线采用倒三角布置,为±500kV柔性直流线路同塔三回的工程设计提供参考。

Conductors arrangement of high voltage DC overhead transmission line has an important influence on the electromagnetic environment,corridor width and lightning protection performance of the line,which largely determines the technical economy of the line. Based on the different arrangements of ± 500 kV three-circuit flexible DC three-circuit conductor( including three groups of metal return lines) on the same tower,the finite element method,traveling wave method and strike distance method are used to calculate the lightning resistance. After technical and economic analysis,the vertical layout of ± 500kV flexible DC three-circuit pole conductor and inverted triangle layout of metal circuit are proposed,which provides reference for the engineering design of ± 500 kV tripleloop VSC-DC conductor.