高压脉冲轨道电路和25Hz轨道电路时间特性匹配解决方案

Solution to Time Characteristic Matching Problem of High-voltage Pulse Track Circuit and 25 Hz Phase-sensitive Track Circuit

京广线广坪段自闭改造工程中车站采用GMG-GX型电子化不对称高压脉冲轨道电路提高分路不良轨道区段分路灵敏度。在现场应用中,不对称高压脉冲轨道电路与97型25Hz相敏轨道电路相邻时,因两种不同制式电路时间特性不一致,出现轨道区段漏解锁、单机高速通过时占用丢失及短暂掉码的现象。通过分析不对称高压脉冲轨道电路和97型25Hz轨道电路时间特性,提出解决方案。

GMG-GX electronic asymmetric high-voltage pulse track circuit is adopted in Guangping section of Beijing-Guangzhou Railway to improve the shunting sensitivity of poor track section.In fi eld application,when the asymmetric high-voltage pulse track circuit is adjacent to the 97 type 25 Hz phase-sensitive track circuit,due to the inconsistency of time characteristics of the two diff erent types of circuits,the phenomenon of missing release of the track section,loss of occupancy and short code missing occurs when the single train passes at high speed.In this paper,the solution is proposed by analyzing the time characteristics of asymmetric high-voltage pulse track circuit and 97 type 25 Hz track circuit.