160km/h速度级市域(郊)铁路隧道区段牵引网的技术探讨

Discussion on Traction Catenary Technology for City(Suburban)Railway Tunnel Interval at Speed Level of 160 km/h

目的:160km/h速度级市域(郊)铁路隧道区段的牵引网架设经验较少,应对牵引网的选型及其组成部分、设计要求和施工精度要求等进行重点研究,以优化完善市域(郊)铁路的供电牵引技术。方法:对我国不同速度等级的城市轨道交通线路和市域(郊)铁路线接触网系统的主要应用现状进行统计分析,建议160km/h速度级市域(郊)铁路采用交流供电制式架空接触网。在此基础上结合隧道断面、空气动力学效应及工程造价等因素,以及我国城市轨道交通线路和市域(郊)铁路线的建设和运营经验,进一步建议160km/h速度级市域(郊)铁路隧道区段采用AC 25 kV供电悬臂式刚性悬挂架空接触网。随后针对供电悬臂式刚性悬挂架空接触网的支持装置、汇流排组件及膨胀接头等主要部件的组成及设计要求进行了详细的阐述。结果及结论:在满足160km/h弓网相互作用的动态性能指标基础上提出了悬臂式刚性悬挂的主要设计技术标准以及主要施工精度要求,以确保弓网间具有良好的受流性能。

Objective:Experiences for installing traction catenary for 160 km/h speed level city(suburban)railway tunnel interval are insufficient.It is necessary to carry out emphasized research on traction catenary type selection and composition parts,design requirements and construction precision requirements,so that city(suburban)railway power supply traction technology is optimized and improved.Method:The current application status of catenary systems for urban rail transit lines and city(suburban)railway lines at different speed levels in China is statistically analyzed.It is recommended that the 160 km/h speed level city(suburban)railway adopts an OCS(overhead catenary system)with AC(alternating current)power supply.Based on factors such as tunnel sections,aerodynamic effects,and construction costs,as well as the construction and operation experiences of urban rail transit and city(suburban)railway lines in China,it is further proposed to use a cantilever rigid suspension OCS with AC 25 kV power supply for the above 160 km/h tunnel intervals.Subsequently,the composition and design requirements of the main components such as the support devices,busbar assemblies,and expansion joints of the power supply cantilever rigid suspension OCS are expounded.Result&Conclusion:Upon fulfilling the requirements of dynamic performance indicators for the interaction between the pantograph and catenary at the speed of 160 km/h,the main design technical standards and construction precision requirements for cantilever rigid suspension are proposed to ensure good current collection performance between the pantograph and the catenary.