特高压交流输电线路的架设方式对经济性的影响

采用经济分析方法，阐述了特高压输电线路双回共塔和2个单回并行2种架设方式下，项目的新增资源消耗和机会成本数量及其相对关系，分析了不同架设方式对特高压交流输电线路经济性的影响。得出的结论是：为了提高经济性，应根据工程的具体情况具体分析，可以采取部分路段双回共塔和部分路段2个单回并行的架设方式。以某一工程为例测算了不同架设方案的经济性。

Analysis on the Impact of Conductor-lay Modes on the Economy of UHV AC Transmission Lines

By using the economic analytical method, this paper compares two conductor-lay modes of UHV transmission lines, including double-circuit on a single tower and single-circuit on a single tower with two parallel transmission lines, in terms of increased consumption of resources and the amounts of opportunity cost and their corresponding relations, and analyzes the impacts of different conductor-lay modes on the economy of UHV AC transmission lines. It is concluded that in order to improve the economic efficiency, two conductor-lay modes may be used separately in a transmission line according to the different situation of actual projects. A case study is conducted to analyze the economy of different conductor-lay modes.