On railways train location is determined automatically by systems controlling the condition of railway track (CRT). The CRT system consists of a transmitter and transducer receiving control signals, they are located on opposite ends of the line which is under control. The estimation of the track condition is carried out by the main device in a transducer. When the level of a control signal exceeds the threshold of the main device it is decided that the line is free and in good operating condition. Otherwise the line is considered to be occupied or out of order. On electrified lines rails are also used to conduct traction current, that is why the CRT transducers receive along with efficient signals parasitic signals at the input as well, the interference signals are produced by traction current. Greater power of electric trains (ET), application of thyristor method for regulation voltage in traction motors, a wide spread regime for recuperative braking intensify generation of interference signals. On the other hand the up-to-date instrumentation base of CRT equipment has the feature of insufficient efficiency of operating signals. These factors make the problem of electromagnetic compatibility of systems for controlling train movement and power supply on electrified railways urgent.
Electromagnetic Compatibility of Systems for Train Movement Control on Electrified Railways
1994-09-13
519363 byte
Conference paper
Electronic Resource
English
Electromagnetic compatibility of electrified railways
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