Оценка влияния электромагнитной обстановки многопутных участков железных дорог на функционирование приемников сигналов автоматической локомотивной сигнализации

Abstract

Increasing the interference immunity of automatic cab signaling receivers of the main locomotive safety devices using the path-locomotive inductive communication channel is a complex task which, in particular, can be solved by assessing the degree of influence of individual factors leading to equipment malfunctions en route. The present work is devoted to assessing the effect of asymmetry arising under the action of traction current flowing in the rail threads of adjacent tracks on multitrack sections of railways. Based on the Bio - Savard - Laplace law, a system of equations has been compiled to calculate the value of the asymmetry coefficient at the input of the cab receiver. The resulting system takes into account the asymmetry in the rail line of each of the tracks, displacement of the receiving coils relative to the axes and levels of the heads of the corresponding running rails. The analysis showed that in conditions of the receiving coils geometric position asymmetry, the asymmetry at the input of the cab receiver when moving along a multi-track electrified section can be five percent or more. In case of placing test sections of automatic cab signaling check-points on tracks adjacent to tracks intended for passing trains, the asymmetry coefficient at the input of the cab receiver reaches forty percent, which can lead to significant distortions of the results of the tests. The proposed equation system and the results obtained can be used to analyze the electromagnetic situation on multi-track sections of electrified railway lines.