WSEAS Transactions on Circuits and Systems
Print ISSN: 1109-2734, E-ISSN: 2224-266X
Volume 17, 2018
The Analysis on Transmission Characteristics of 25Hz Phase-Sensitive Track Circuit in Broken State
Authors: , ,
Abstract: 25Hz phase-sensitive track circuit has become the first selection of coded track circuit in railway station. The transmission characteristics of 25Hz phase-sensitive track circuit in broken state for analysis under the premise of considering the choke transformer. Take into account the impact of the choke transformer and adjacent track sections fully, and join the equivalent input impedance between the midpoint of the starting and the end of the rail line and the earth. Then the four terminal network model of the track circuit in broken state is established. And application of the distributed parameter method to solve the four terminal network coefficient of track circuit in the condition of broken state. Then, the transmission characteristics of the track circuit in broken state is carried out simulation analysis by using MATLAB simulation software. The simulation results show that broken rail state of track circuit power supply terminal voltage and current with position of broken rail, rail surface conductance and ballast resistance are related closely. Finally, according to the results of simulation analysis, the method of improving the sensitivity of the track circuit in broken state is proposed. The specific measures include: reducing the length of track circuit properly, increasing ballast resistance, increasing the rail surface conductance coefficient.
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Keywords: Phase-sensitive track circuit, Transmission characteristic, Distribution parameter, Broken rail state
Pages: 60-67
WSEAS Transactions on Circuits and Systems, ISSN / E-ISSN: 1109-2734 / 2224-266X, Volume 17, 2018, Art. #9