Verification technique based on train-ground correlation analysis for false unoccupancy of track circuit
YANG Shiwu
MA Canghai
ZHAO Ming
TANG Qiankun
Abstract：The principal function of track circuit is to check occupancy or clearing of the tracks, therefore the operation safety may be threatened once the false unoccupancy happens.At first, this paper briefly analyzes and rules out the following possible factors based on the field case and related data,i.e.harmonics of traction current and bypass signal current,which may cause the rise of residual voltage of track circuit.Then,using a detailed simulation model of track circuit under shunting state of the multi-axle locomotive,both cab signaling voltage and receiver voltage are calculated.It is validated that the cab signal voltage will decline while the receiver voltage of track circuit may remarkably increase by comparison with recorded data,so the conclusion can be drawn that the bad shunting leads to false unoccupancy.Finally,according to their quantitative interdependency,transfer coefficients are introduced so that a novel method can be applied in comprehensive diagnosis on shunting state of track circuit.
Keywords：track circuitcab signalingfalse unoccupancyresidual voltagetransfer coefficientsharmonic interference
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 75-81 )