±800kV特高压直流线路大截面导线选型研究

The Study of Conductor Selection for Large Cross-section Conductor of ± 800 kV UHV DC Lines

导线选型是特高压输电技术的重要课题,对线路的输送容量、传输性能、环境问题、线路走廊宽度及房屋拆迁范围,对降低工程造价都有着十分重要的意义。特高压线路采用大截面导线,在减小线路损耗,降低输电线路表面场强、无线电干扰和可听噪声等方面具有比较大优势。其导线选型,需综合分析电磁环境、机械性能、杆塔荷载、经济性、导线制造、架线施工、运行维护等方面因素,并需要结合工程的自然条件等。

Conductor selection is an important issue of UHV transmission technology,line transmission capacity,and transmission performance,environmental issues,the line width of the corridor and house demolition range ,have a great impact on reducing the project cost as a very important significance. The use of UHV large section of wire has a comparative advantage for reducing line losses, reducing the field strength of the surface of the transmission lines ,radio interference and audible noise. Conductor selection requires comprehensive analysis of the electromasnetic environment,mechanical properties,tower loading, economy ,wire manufacturing,operation and maintenance and other factors ,and the need to combine the natural conditions of the project.