A Group Topology Structure of Power Batteries for Hybrid Electric Locomotive

Abstract

The invention discloses a group topology structure of power batteries of a diesel-electric hybrid locomotive, wherein a chopping unit is connected in parallel with a supporting capacitor C, and the chopping unit is also connected to an AC / DC module, a DC / AC module, a reactor unit and a power battery system; The power battery system includes several groups of power modules; the power module includes a contactor unit, a current sensor, a fuse, a power battery and a voltage sensor; the contactor unit, the current sensor, and the power battery are connected in series, and the two ends of the voltage sensor are respectively set on the sides of the power battery. Both ends; the locomotive microcomputer is respectively connected to the DUC controller and the power battery management system; the DUC controller is connected to the DC / AC module, the chopper unit and the contactor unit; the power battery management system is connected to the contactor unit. The present invention is provided with a chopper unit and a reactor unit, which can completely solve the control difficulty when multiple groups of power batteries are put into operation, ensure the reliability of the power battery system, and effectively prolong the life of the power battery.

Description

technical field [0001] The invention belongs to the field of rail transportation of locomotives and vehicles, and relates to a group topology structure of power batteries of an oil-electric hybrid locomotive. Background technique [0002] At present, the group topology of the power battery of the hybrid electric locomotive at home and abroad is as follows: figure 1 As shown, the power battery system is divided into two or more groups to be connected in parallel according to the amount of energy. The disadvantage of this topology is that it is difficult to control when multiple groups of power batteries are put into operation, and at the same time, it is easy to cause the impact of large current backflow between the power battery groups. Damage the fuse in the main circuit and cause arcing, burrs or damage to the contacts of the contactor. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide...

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Problems solved by technology

[0002] At present, the topological structure of the power battery group of gasoline-electric hybrid locomotive at home and abroad is as follows: figure 1 As shown, the power battery system is divided into two or more groups according to the energy level and connected in parallel. The disadvantage of this topology is that it is difficult to control when multiple groups of power batteries are put into operation, and it is easy to cause the impact of large current backflow between the power battery groups. Damage the fuse in the main circuit and cause arcing, burrs or damage to the contacts of the contactor

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