基于树形双边供电的重载铁路贯通同相供电方案

Cophase connected power supply scheme of heavy haul railway based on tree bilateral power supply

结合重载铁路既有供电方式特点,提出一种适用于重载铁路牵引供电系统的贯通同相供电方案。介绍该贯通同相供电方案的3项关键技术,即:组合式同相供电技术、树形双边供电技术以及牵引网分段供电与状态测控技术,并对树形双边供电系统的均衡电流以及单线牵引网阻抗进行详细研究;以某既有重载铁路牵引供电系统改造工程为例,将该贯通同相供电方案应用于该线路牵引供电系统工程改造中;通过理论分析以及实测分析,分别从运行模式、均衡电流实测分析、牵引网分段测控技术的适应性等角度对该既有线路贯通同相供电改造方案可行性进行分析。研究结果表明:基于树形双边供电的贯通同相供电方案可行,且兼顾更好的系统性能以及技术优势。

Considering the existing characteristics of power supply modes of the heavy haul railway,the cophase connected power supply scheme for traction power supply system of heavy haul railway was proposed.Firstly,three key technologies of the cophase connected power supply scheme were introduced,namely,combined cophase power supply technology,tree bilateral power supply technology and traction network sectional power supply and state measurement and control technology.The balanced current of tree bilateral power supply system and the impedance of the single-line traction network were studied in detail.Secondly,taking the reconstruction project of a heavy haul railway traction power supply system as an example,the scheme of cophase connected power supply was applied to the engineering renovation of traction power supply system of the line.Finally,through the theoretical analysis and actual measurement analysis,the feasibility of the existing line cophase connected power supply renovation scheme was analyzed from the aspects of operation mode,the actual measurement analysis of the balanced current and the adaptability of the traction network sectional measurement and control technology.The results show that the cophase connected power supply scheme based on tree bilateral power supply is feasible,and has better system performance and technical advantages.