城市轨道交通牵引网上网组合开关柜方案研究

通过分析直流牵引供电系统中上网隔离开关设计方案,对比各方案在技术、施工、运维等方面的优缺点,提出越区开关采用直流快速断路器的上网组合开关柜方案可以在牵引网不停电的情况下方便地实现牵引网大双边与小双边供电方式之间的转换,确保牵引网持续、稳定、可靠地为列车提供电源,提高直流牵引供电的安全可靠性。并提出优化建议,可减少设备投入,节省工程投资,提高运营维护效率。

Research on scheme of combined switch cabinet for urban rail transit traction network

Through the analysis of the design scheme of the on grid disconnector in the DC traction power supply system,and comparing the advantages and disadvantages of each scheme in the aspects of technology,construction,operation and maintenance,this paper proposes the scheme of online combined switch cabinet with DC fast circuit breaker,which conveniently realizes the mode shift between large bilateral and small bilateral power supply modes of traction network without power off or electricity outage,so as to ensure traction network provide continuous,stable and reliable power for trains,and improve the safety and reliability of DC traction power supply.It puts forward optimal suggestions to reduce equipment investment,save civil works investment and improve operation and maintenance effi ciency.