HXD电力机车牵引电流高次谐波对25Hz轨道电路干扰问题的解决

Solution to Interference on 25Hz Track Circuit from HXD Series Electric Locomotive Traction Current’s High Harmonic Waves

针对北京局丰沙线、唐呼线等多站出现的25Hz相敏轨道电路接收电压大幅波动问题,进行了逐项分析排查,确定了造成干扰的原因是HXD系列电力机车牵引电流高次谐波。为此,本文提出了在25Hz轨道电路送、受电端增加室外隔离防护盒的解决办法;经现场试验后,成功解决了此类干扰问题。

To address the problem of large fluctuation of the receiving voltage of 25Hz phase-sensitive track circuit in several stations on the Fengtai-Shacheng line and Tangshan-Hohhot line within the jurisdiction of Beijing railway administration,an item-by-item analysis of the fault is conducted to determine that the interference is caused by HXD series electric locomotive traction current’s high harmonic waves.In response to such interference,a solution is proposed to increase the outdoor isolation protection box at the 25Hz track circuit transmitting and receiving ends.After field test,the interference problem has been successfully solved.