城市轨道交通交流供电系统牵引变电所设置原则

Principles for Setting of Traction Substations for AC Power Supply System in Urban Mass Transit

城市轨道交通一般采用直流供电制式,由此产生的杂散电流对城市轨道交通的安全运营造成严重影响。本文基于一种新型城市轨道交通交流供电系统,研究其电缆牵引网中电流分配规律、电压损失计算及牵引变压器容量设置等相关理论,并进行仿真验证;最后给出城市轨道交通交流供电系统牵引变电所设置原则,并进行实例设计。

Urban mass transit normally adopts DC power supply mode,and the generated stray current will induce severe interference to the safety operation of urban mass transit.In this paper,on the basis of a new type of DC power supply mode for urban mass transit,the analysis has been made on the related theories of current distribution regularities in cable traction network,voltage loss calculation and setting of capacity of traction transformers,and simulation and verification have been carried out as well.Finally,principles have been given for the setting of traction substations for AC power supply system for urban mass transit and the real example design has been performed accordingly.