川藏铁路贯通式柔性交流牵引供电系统

Continuous Flexible AC Traction Power Supply System in Sichuan-Tibet Railway

研究目的:川藏铁路沿途环境既特殊又复杂,对供电系统的性能要求非常高。本文提出基于静止功率变换器的贯通式柔性牵引供电系统方案,以达到适应川藏铁路特点和需求的目的。研究结论:(1)从系统设计、运行方式、核心变流器拓扑、控制保护构架和功能方面给出了贯通式柔性牵引供电系统设计方案,能够克服长大坡度过分相、牵引负荷功率极端变化导致的电压损失高和短时峰值功率大等问题,具有高可靠性、高电能质量等优势;(2)以在建的北京大兴机场线贯通式柔性牵引供电系统为工程实例,说明了所提方案的有效性;(3)本研究结论可为川藏铁路等重要特殊场景的牵引供电系统设计提供参考。

Research purposes:The environment along the Sichuan-Tibet Railway is complicated and special,which requires highly on the performance of power supply system.This paper proposes a continuous flexible AC traction power supply(FACTP)system based on static power converter,so as to satisfy the characteristic and demand of Sichuan-Tibet Railway.Research conclusions:(1)The design of the continuous FACTP system is given,including the system design,operation method,core converter topology,control protection structure and function.The proposed system can deal with problems of high voltage loss and high short-time peak power caused by neural sections of long slope and extreme change of traction load power,and has high reliability and high power quality.(2)The under-construction continuous FACTP system of Beijing Daxing Airport Line is taken as an example,which verifies the validation of the proposed FACTP system.(3)The research conclusions can provide reference for the design of traction power supply system of special railways such as Sichuan-Tibet Railway.