A diesel locomotive AC auxiliary system with train power supply function

Abstract

The invention provides a diesel locomotive AC auxiliary system having a train power supplying function. The auxiliary system comprises a train main generator, a main conversion system and traction motors. The train main generator supplies power for the traction motors through the main conversion system. The auxiliary system also comprises a train power supply cabinet and an auxiliary conversion cabinet. Electric energy output by the main conversion system is sent to a conversion module in the auxiliary conversion cabinet after the electric energy passes through transformers and inverters in the train power supply cabinet, and the conversion module supplies power for loads of the auxiliary system. The auxiliary system can distribute traction electric energy and train power supply energy in a real-time manner. According to the invention, the train power supply can serve as the load for traction motor feedback braking, and the electric energy fed back to an intermediate DC link by the traction motors can provide electric power input for train power supplying. The auxiliary system is advantaged by high power supplying stability.

Description

technical field [0001] The invention relates to the field of rail transportation, in particular to an AC auxiliary drive system for a diesel locomotive with a train power supply function. Background technique [0002] At present, there are two commonly used train power supply methods for diesel locomotives. One is to use the main and auxiliary generator sets, and the auxiliary generator supplies power to the train. The other is that the locomotive uses an independent auxiliary diesel generator set, which is converted into the power supply required by the passenger car through phase-controlled rectification. [0003] These two power supply methods all have the following disadvantages: 1) increase the total weight and cost of the locomotive; Free distribution between the main generator and the auxiliary generator; 3) energy waste, the electric energy fed back when the locomotive resistance braking cannot be utilized as the electric energy input when the train is powered. Co...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an AC auxiliary system for diesel locomotives with a train power supply function in view of the problems existing in the prior art, and to solve the problem that the existing two power supply methods are not conducive to the distribution of electric energy between the main generator and the auxiliary generator. The problem of free distribution between the two existing power supply methods can solve the problem that the electric energy fed back when the locomotive resistance brakes can not be used as the electric energy input when the train is powered

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