双分裂导线在500kV重冰区线路中的应用

摘要

湖北江坪河水电站500kV送出线路30mm冰区长达50km，为保证该线路的安全可靠和经济合理，本文从导线截面和分裂型式，及输送容量、电磁环境、机械特性及工程投资等方面系统地介绍了该线路的导线选型论证。采用双分裂大截面导线，电磁环境能满足规程要求；机械性能双分裂导线方案明显优于四分裂导线方案，且显著节省投资。故推荐该线路30 mm重冰区线段采用双分裂大截面导线。%Jiang Ping river water power station of hubei province 500 kv send line 30 mm ice up to 50 km,to ensure the safe and reliable and reasonable economy of the line,from the conductor cross section and split type,and transportation capacity,electromagnetic environment,the respect such as mechanical properties and engineering investment systematical y introduces the line cable type arguments.Adopts double split large cross-section wire,electromagnetic environment can satisfy the requirement of regulations;Mechanical properties of double split conductor scheme was better than four split conductor,save investment and significant.Therefore,recommended the line 30 mm heavy ice line adopts double split large cross-section wire.