北京城轨交通牵引供电系统投资控制研究

城轨交通是缓解大中城市交通压力的重要途径，但其造价近年来呈上升趋势。如何有效控制工程造价成为大家关注的热点，也是制约城轨交通可持续发展的关键。此文结合北京城轨交通牵引供电系统，在阐述其投资构成的基础上，分析控制牵引供电系统投资的重点和方式。并通过对在建和已建城轨交通牵引供电系统主要技术经济指标的统计，分析拟建工程是采用DC1500V接触网，还是采用DC750V接触轨更经济、更合理。

Research on the Investment Control of Traction Power Supply System in Beijing Urban Rail Transit

Urban rail transit is an important approach to reduce the pressure on urban traffic, but its cost is on the rise in recent years. How to effectively control the project cost become the hot spot of attention, and also is the key to restricting the sustainable development of urban rail transit. This article combined with the traction power supply system of Beijing unban rail transit, based on expounding its investment constitute, the key point and mode of controlling the investment of traction power supply system are analyzed. Through the statistics of main technical and economic indexes of the unban rail transit traction power supply system, which is economic and reasonable about the proposed project using DC1500V catenary or DC750V contact rail is analyzed.