Analysis of interference and protective measures of electrified traction current on signal track circuit based on Moire signal

In railway transportation, electric traction can greatly improve the transportation capacity, can significantly save energy and has no environmental pollution. It is one of the main signs of railway modernization. With the development of railway transportation and the increase of train weight and train speed, the electric traction current also increases. Electric traction also brings great strong electric interference to railway signaling equipment, and the influence of traction current on signaling equipment also increases. However, the return of unbalanced traction current in the rail has the most serious conductive interference to the track circuit. If certain protective measures are not taken, it will affect the normal operation of the track circuit. The track relay malfunctions, causing an error display signal, a locked circuit error to unlock, and even burning the device. Such as rail circuit insurance, choke transformers, etc. Without the support of more advanced railway signal equipment, the advantages of electrified railways cannot be fully utilized. Therefore, it is necessary to understand the formation of the unbalanced current of the rail and take protective measures to make the signal equipment work stably and reliably. (paper)