随着节能型输电线路导线工作原理和结构的不断完善，其在工程实践中得到了广泛应用，但在实际工程中导线设计参数的选择受到建设环境的限制，如设计荷载条件、海拔高度、线路长度等。针对实际工程中220 kV线路节能导线的选型，从电气特性、机械特性和经济分析等方面对备选导线进行了技术经济比较，推荐了在技术和经济上最优的导线型号。指出资源节约型输电线路以及节能型系列导线，在新线路的建设中能获得良好的经济效益和社会效益。

The resource-saving transmission line and the energy-saving wires has been widely used in practical engineering due to the excellent characteristics of energy-saving, materials-saving, land-saving, long service life and good performance-price ratio, with development of its work principle and structure. The wires’ choice in actual project was restricted by the environmental conditions of line wire, such as design load conditions, altitude, line length and so on. This paper studied the selection of construction type in a 220 kV transmission line project, compared the technical economy of the optional wires from three aspects: electrical characteristics, mechanical characteristics and economic analysis and recommended the optimum conduct type in technology and economic. The results show that the resource-saving transmission line and the energy-saving wires have good economic and social benefits in the construction of new line.