No-fire loopback power supply device and power supply control method for AC/DC locomotive

Abstract

The invention discloses a power supply device for power-free returning of an alternating current-direct current transmission locomotive and a power supply control method. The device comprises an excitation control branch and a power supply output branch, wherein the excitation control branch comprises a storage battery power source module and a direct current chopping voltage reduction module which are connected with each other, voltage output by the storage battery power source module passes through the direct current chopping voltage reduction module and becomes excitation voltage, and the excitation voltage is provided for a direct current motor excitation winding; the power supply output branch comprises an inverter model and an alternating current processing module which are connected with each other, direct current output by a traction motor is fed into the inverter module and inverted into alternating current, the alternating current passes through the alternating current processing module, and then power supply voltage is output; and the input end of the excitation control branch is connected with the output end of the power supply output branch through a rectification voltage transformation module, and thus the storage battery power source module is charged. According to the method, power supply control is achieved by controlling the excitation control branch and the power supply output branch. The power supply device can achieve power supply for power-free returning of the alternating current-direct current transmission locomotive and has the advantages of simple structure, low required cost, changelessness of the locomotive structure, flexible application and the like.

Description

technical field [0001] The invention relates to the technical field of AC / DC transmission locomotives, in particular to a non-fire loopback power supply device and a power supply control method for AC / DC transmission locomotives. Background technique [0002] When the locomotive is returning without fire, it is strictly forbidden to lift the bow and close the brakes. Therefore, there is no basic living electricity such as ventilation, heating, and lighting in the locomotive, which makes the living and working environment of the crew members poor. At present, there is no specific application of fire-free loopback devices, and the research on fire-free loopback power supply is usually only a simple use of existing power supply methods, and the application limitations are very large. For example, the patent application CN104129393 discloses a kind of power supply system for the non-fire return locomotive attached by the duty locomotive. To supply the necessary domestic electri...

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Problems solved by technology

For example, the patent application CN104129393 discloses a kind of power supply system for the non-fire return locomotive attached by the duty locomotive. To supply the necessary domestic electricity for unfired return locomotives. This scheme is only applicable to the situation where the unfired return locomotive and the main locomotive are attached at zero distance, and it is not suitable for locomotives attached to the tail of the train. In practice, its application is very limited

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