双回交流线路采用2分裂大截面导线的方案

Application of 2-Bundle Large-section Conductors in Double-circuit AC Transmission Lines

根据我国导线的研制、生产、应用情况,结合目前我国的物价、电价水平,经综合技术经济比较,推荐500kV双回交流线路采用2分裂1000mm2大截面的导线方案。该方案与常规4分裂400mm2导线方案相比,不仅具有减少杆塔水平荷载、降低杆塔指标、抑制导线舞动、简化金具和绝缘子串的设计等优点,同时还能大大降低输电过程中的电阻损耗,达到节能、降耗、环保的目的,具有明显的经济效益和社会效益,对建设"资源节约型、环境友好型"的电网有着重大的意义。

The 2-bundle large-section conductor of 1 000 mm2 in area is recommended to be applied in 500 kV double-circuit AC transmission lines according to a comprehensive technical and economical comparison based on the production and application of conductors in our country,and the present price level and power tariff.This type of conductor has many advantages over the conventional 4-bundle conductor type with the cross-section of 400 mm2 in reducing the weight and horizontal load of towers,mitigating conductor galloping and simplifying the design of fittings and insulator strings.Furthermore,it can substantially reduce the resistance losses of transmission lines to achieve the goal of energy saving,consumption reduction and environmental protection,which is of significance to the construction of resource-saving and environmental-friendly power grid systems.