时速400 km以上高速铁路应答器传输系统适应性研究

Research on Adaptability of Balise Transmission System of High-speed Railway with Speed above 400km/h

当列车速度提高至350 km/h以上时,列控系统点式应答器车-地信息传输质量将受到影响,为保证动车组以400 km/h及以上速度高速运行时仍能可靠接收地面应答器报文信息,需研究分析我国高速铁路应答器传输系统的高速适应性。借鉴应答器传输系统高速适应性评价方法,通过仿真分析计算确定应答器与车载天线静态作用距离、动态传输最小作用区,并推导出目前应答器传输系统可适应370 km/h高速运行。为保证400 km/h及以上高速铁路应答器报文信息传输质量,需调整影响应答器静态作用距离、动态传输最小作用区的相关技术参数,经研究,增加应答器x轴方向有效参考区可提高应答器传输系统高速适应性。研究结果表明:当应答器x轴有效参考区增加至251 mm以上时,应答器传输系统可以适应400 km/h以上高速运行,该方案无需修改现行应答器报文传输格式和车载天线规格,可满足不同设计速度的高速铁路互联互通。

When the train speed increases to more than 350km/h,the train-to-wayside data transmission quality of the balise spot transmission system for the train control system will be affected.In order to ensure that the EMU can reliably receive the balise telegram when running at the speed of 400 km/h or above,it is significant to research and analyze the high-speed adaptability of the balise transmission system for high-speed railways.With the reference of the evaluation method of high-speed adaptability of the balise transmission system,the static contact length between the balise and the onboard antenna,the minimum dynamic transmission contact zone are determined through simulation,analysis and calculation,and it is deduced that the current balise transmission system can be adapted up to 370 km/h.In order to ensure the data transmission quality of balise for high-speed railways of 400 km/h and above,it is necessary to adjust the relevant technical parameters that affect the static contact length and the minimum contact zone of dynamic transmission.The research result shows that the high-speed adaptability of the balise transmission system can be improved when the effective reference zone in the X-axis direction of the transponder is increased.When the X-axis effective reference zone of the balise increases to more than 251 mm,the balise transmission system can be adapted above 400 km/h.This proposal does not need to modify the current balise telegram format and the onboard antenna specifications,and can meet the interoperability of high-speed railways with different design speeds.