Control method for one-way conduction device with arc extinction function

Abstract

The invention discloses a control method for a one-way conduction device with an arc extinction function, and relates to the field of stray current prevention in a subway system. An intelligent controller receives an in-position signal generated when a detected train passes through an insulation junction, acquires voltage signals at the two ends of the insulation junction, and triggers a high-power electronic switch to reversely conduct the insulation junction when voltage is higher than a set value, so that the arc of the insulation junction is prevented; and the intelligent controller in the one-way conduction device acquires the working state of each part circuit in the one-way conduction device, sends the data to an integrated automation center through a field bus, monitors the working state of the one-way conduction device in real time, can remotely control the one-way conduction device, and uploads the working state parameters of the one-way conduction device to a microcomputer management system through Ethernet, so that the one-way conduction device in the whole subway line is monitored on line. The one-way conduction device has the advantages that the device reliably works, has a simple structure, is high in real-time property and can be widely applied to a subway stray current corrosion prevention system.

Description

technical field [0001] The invention relates to the field of stray current protection in subway systems, in particular to a control method for a one-way conduction device with arc suppression, which is mainly used in subways and light rails. Background technique [0002] In the maintenance of the depot and the parking garage, due to the decrease of the transition resistance of the track to the ground, the leakage of stray current is increased. At present, the design of my country's subways in special areas adopts the method of insulating junctions and one-way conducting devices to prevent stray currents. Current corrosion ensures the continuous flow of track current; however, if this method is adopted on the main line of the subway, sometimes due to the high voltage at both ends of the insulating junction, when the train leaves the insulating junction, the insulating junction will burn the track by arcing, affecting To ensure the safety of train operation, effective measures m...

AI Technical Summary

Problems solved by technology

[0002] In the maintenance of the depot and the parking garage, due to the decrease of the transition resistance of the track to the ground, the leakage of stray current is increased. At present, the design of my country's subways in special areas adopts the method of insulating junctions and one-way conducting devices to prevent stray currents. Current corrosion ensures the continuous flow of track current; however, if this method is adopted on the main line of the subway, sometimes due to the high voltage at both ends of the insulating junction, when the train leaves the insulating junction, the insulating junction will burn the track by arcing, affecting To ensure the safety of train operation, effective measures must be taken to eliminate the influence of arcs and ensure the normal operation of trains; the current one-way conduction devices are basically single-machine operation, without effective communication with the monitoring center, and their operating status And the effect cannot be guaranteed. In addition, the one-way conduction device is generally installed in remote places such as parking lots and tunnel entrances, far away from the monitoring room, and it is subjected to high voltage and high current.

If the equipment fails during the train operation, the return circuit may be disconnected and the train will stop running, and the maintenance personnel cannot immediately determine the cause of the failure, resulting in serious operational accidents

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