Train control method and device for automatic ground phase separation

Abstract

The invention discloses a train control method and device for automatic phase separation on the ground. The method includes detecting the power supply state of the traction network in real time during the phase separation process of the train, and controlling the traction converter according to the first control mode or the second control mode. The first control mode is to control and block the rectifier and unload the traction inverter when it is detected that the traction network is powered off, and to resume the traction or braking force of the rectifier and the traction inverter when it is detected that the traction network resumes power supply; The second control mode is to control the blockage of the rectifier and the traction inverter when it is detected that the traction network is powered off, and to control the restoration of the rectifier and the control of the traction inverter to resume traction or braking after restarting with residual magnetism power. The invention can be matched with various ground over-phase-splitting devices to realize train over-phase-splitting control, and has the advantages of short time for losing traction when the train is over-phase-separating, uninterrupted power supply of auxiliary systems, high safety and reliability, and the like.

Description

technical field [0001] The invention relates to the technical fields of electrified railway traction power supply technology and train control technology, in particular to a train control method and device for automatic phase separation on the ground. Background technique [0002] The traction power supply system of trains such as electric locomotives and EMUs is single-phase power supply, and usually adopts segmental power supply mode, such as figure 1 As shown, the traction transformer in the traction substation converts the three-phase AC power of the power system into two single-phase AC power, and each is responsible for the power supply task of a certain distance section (usually 10-50km). The insulating section is used for electrical isolation, so there is an electric-free zone, which is the electrical phase separation zone of the traction power supply system. Over-phase means that the train passes through the electric phase-separation area, and corresponding counter...

AI Technical Summary

Problems solved by technology

[0006] When using the ground automatic over-phase separation device to control the train over-phase separation, at present, after the train over-phase separation is detected, all pulses of the traction converter are immediately blocked, the train loses traction and is in a idling state, and the ground switch is completed after a certain period of time (about 130ms) After the switchover restores the power supply, delay (about 6s) and wait for the residual magnetism of the motor to disappear before starting the inverter to avoid overcurrent at inverter startup caused by the residual magnetism of the traction motor, and it takes a certain period of time (at least 1s) to establish excitation after the inverter starts The current, and then the train restores the traction according to the driver’s traction handle. The traction recovery takes a long time (at least 5s or more), which makes the train completely lose traction for a long time (at least 7s or more) during the automatic phase separation process on the ground, which cannot reflect the above The ground automatic over-phase device controls the advantages of short power loss time of the traction network, especially the dead time of the electronic switch automatic over-phase device is only a few milliseconds, and the above-mentioned train control method cannot give full play to the performance of the ground automatic over-phase device

Images