Power supply method and device for alternating-direct current locomotive upon unpowered conveying

Abstract

A power supply method for an alternating-direct current locomotive upon unpowered conveying is characterized in that a power supply device for an alternating-direct current locomotive is disposed on the locomotive, a locomotive battery is used to provide exciting power for a traction motor through an exciting chopper module of the power supply device, the traction motor enters power generation state to power a locomotive load, and after the traction motor enters the power generation state, the exciting chopper module uses the power generated by the traction motor to continuously provide exciting power for the traction motor. After the traction motor enters the power generation state, the power generated by the traction motor is used to provide exciting power for the traction motor, and itis ensured that in the power generation process, the exciting power is continuously supplied so that the traction motor can generate power continuously and stably; by monitoring, in real time, speed of the traction motor, voltage and current of two ends of a traction motor armature and output current of the exciting chopper module, the magnitude of exciting current output by the exciting chopper module can be adjusted according to monitored values to ensure that power generated by the traction motor has stable voltage.

Description

technical field [0001] The invention relates to a power supply method and device, in particular to a power supply method and a power supply device for an AC-DC locomotive when there is no fire return, and belongs to the technical field of rail transit. Background technique [0002] Once the AC-DC locomotive breaks down or is overhauled outside the section, it will be returned to each locomotive overhaul factory for overhaul and maintenance. During the return period, the diesel locomotive must not start the diesel engine, and the electric locomotive must not raise the bow. At this time, the returning locomotive cannot generate electricity by itself or obtain electricity from the catenary, and the staff who deliver the locomotive cannot obtain domestic electricity, resulting in the unsatisfactory requirements for daily life such as heating rice, boiling water, and air conditioning. Especially in severe cold or hot summer season, the temperature in the locomotive is very low or...

AI Technical Summary

Problems solved by technology

[0008] Although the above-mentioned documents all relate to the method and device for using the locomotive battery to excite the traction motor and converting the traction motor into a generator to supply power to the locomotive, none of them can regulate and control the power generated by the traction motor, so it is very likely to cause insufficient power supply. Stablize

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