Device for suppressing track circuit harmonic wave

Abstract

Provided is a device for suppressing the track circuit harmonic waves. The device is installed in the track circuit. The track circuit comprises a first line and a second line which are parallel, andthe device comprises a mechanical joint hollow coil and a tuning matching unit; the first end of the mechanical joint hollow coil is connected with the first line of the track circuit, the second endof the mechanical joint hollow coil is connected with the second line of the track circuit; the tuning matching unit is connected with the track circuit and is connected with the mechanical joint hollow coil in parallel to form a parallel resonance circuit. According to the device for suppressing the track circuit harmonic waves, the mechanical joint hollow coil is used for balancing traction current and stabilizing the tuning area impedance to filter the power frequency interference, and the mechanical joint hollow coil and the tuning matching unit are connected in parallel to form the parallel resonance circuit, and a track circuit receiving end high impedance is formed, so that the effective frequency-shifting signals can be transmitted into the room, and meanwhile, the interference ofthe harmonic waves to the indoor equipment can be prevented.

Description

technical field [0001] The invention relates to the field of rail transportation, in particular to a device for suppressing harmonics of a rail circuit. Background technique [0002] The track circuit is a circuit composed of rail lines and rail insulation, which is used to automatically and continuously detect whether this section of the line is occupied by rolling stock, and is also used to control signal devices or switch devices to ensure driving safety equipment. Such as figure 1 As shown, the conductive disturbance of the electrified railway, that is, the unbalanced traction current and the signal current of the track circuit have a common transmission channel. In practical applications, there will be unbalanced factors that cause the traction currents in the rails to no longer be equal, thus forming a differential mode current. The differential mode current and the impedance of the receiving end form the rail surface voltage of the receiving end, and the rail surface...

AI Technical Summary

Problems solved by technology

However, the existing matching unit in the station only has a transformer module and a lightning protection module, and does not have a resonant circuit to suppress the interference of high-order harmonics of the power frequency, which will cause the interference signal to enter the room directly through the transformer without filtering, and affect the indoor equipment. cause interference

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