Ground power supply method and device for rail transit based on digital signal recognition

Abstract

The invention discloses a ground power supply method and device for rail traffic based on digital signal recognition. The ground power supply method comprises the steps that a triggering level signalis generated in real time, a recognition current is sent to a recognition rail according to the triggering level signal, the recognition current transmitted by the recognition rail is obtained, and after it is determined that the received signal is the predetermined power supply signal, a power supply current is output to a power supply rail; a first variable value and a second variable value areobtained, and the difference value of the first variable value and the second variable value is calculated; and whether the difference value is larger than the preset reference value or not is judged,and if the difference value is larger than the preset reference value, the power supply current is stopped to be output to the power supply rail. The ground power supply device is used for achievingthe ground power supply method for rail traffic based on digital signal recognition. Continuous recognition of the digital signal content is adopted to electronically control whether the power supplyrail is electrified or not, and meanwhile the functions of stable power supply, rapid power supply effect, high security, low external disturbance and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of trams, in particular to a digital signal identification-based rail transit ground power supply method and a rail transit ground power supply device for realizing the method. Background technique [0002] Trams have the advantages of zero emissions, no pollution, low cost, low accident rate, and convenient construction. The passenger capacity is 3 to 5 times that of buses. It can play a huge role in cities with serious traffic jams and difficult to build subways. [0003] The power supply methods of existing trams are generally power supply catenary, super capacitor, electromagnetic induction power supply and magnetic suction mechanical trigger power supply rail technology. [0004] Among them, the installation of the power supply catenary is difficult, which greatly affects the appearance of the city. The capacitive effect of the catenary will have an adverse impact on the environment; the supercapacitor ...

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Problems solved by technology

[0004] Among them, the installation of the power supply catenary is difficult, which greatly affects the appearance of the city. The capacitive effect of the catenary will have an adverse impact on the environment; the supercapacitor power supply has a short battery life and will discharge when it is not running. Once it is parked for a long time on the way, it cannot be started again. , The instantaneous current of capacitor charging and discharging is extremely large, causing a large load to the power grid, and a large transformer must be used, resulting in low power consumption efficiency; the electromagnetic induction power supply is too wasteful, and the maintenance cost is high; the magnetic suction mechanical trigger power rail technology. Unstable structure, susceptible to environmental interference

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