城市轨道交通牵引变电所主结线方案研究

On the Main One-line Scheme for Urban Rail Transit Traction Substation

城市轨道交通直流牵引供电系统中用电和发电同时存在,其负荷属于典型的脉冲大功率负荷,其牵引变电所应至少具有整流、功率平衡和牵引网电压控制3种基本功能。依据功能需求决定主结线方案的基本原则。综合技术经济因素分析比较了几种典型主结线方案,给出了2种性能优良和经济适用的牵引变电所主结线方案。鉴于目前大功率功率控制器件和储能介质的发展水平,综合技术经济因素,牵引变电所宜采用多重化二极管整流与逆变回馈或者储能装置组合的主结线方案。

Abstract In urban rail DC traction power supply system, the electric power generation and power utilization are coexisting, the system load is a typical pulse high power load. The traction substation requires at least 3 basic functions., rectification, power balance and voltage control of traction line. According to the basic principle that the function demands will deten＇aine the main one-line scheme of the traction substation, and based on the comprehensive technical and economic factors, several typical schemes of traction substation are compared and ana- lyzed, among them two schemes of the traction substation with ideal output performance and economic applicability are pres- ented. According to the development level of the large power controller and energy storage medium, and combined with technical and economic factors, the scheme of multiple diode rectifier ＋ feedback inverter or energy storage devices is rec- orrnnended.