市域铁路两种牵引供电制式工程投资对比分析

随着城市化和城镇化进程的加快及区域经济发展实力的增强,市域铁路建设进入轨道交通行列。在市域铁路工程建设中,牵引供电系统是采用25 kV交流供电制,还是采用750 V或1 500 V直流供电制,其选择直接影响到工程项目的建设规模、技术和建设标准、网络资源共享和工程投资。此文在分析交、直流供电制式主要技术特点的基础上,就选择交、直流供电制式的关键因素进行论述,并以工程实例对2种供电制式的工程投资进行分析与对比。从工程投资来说,市域铁路采用高架敷设方式,交流供电制式节省投资;采用地下敷设方式,直流供电制式节省投资。

Investment Comparison and Analysis of Two Traction Power Supply Systems in Regional Railway

Along with the speeding up of urbanization and the rising power of regional economic development, regional railway construction is included in rail transport traffic. In the construction of regional railway engineering, traction power supply system is the 25 kV AC power supply system or the 750 V or 1500 V DC power supply system will directly affect the construction scale , the technical and construction standards,network resource sharing and engineering investment of the project. Based on the analysis of the main technical characteristics of AC, DC power supply system, the key factors of the choice of the AC and DC power supply system are discussed. An engineering example of two kinds of power supply system of were analyzed and compared. From the engineering investment, regional railway adopting overhead laying method, AC power supply system can save investment; using the method of laying underground, DC power supply system can save investment.