Grouped topological structure for power batteries of gas-electric hybrid locomotive

Abstract

The invention discloses a grouped topological structure for power batteries of a gas-electric hybrid locomotive. A chopping unit and a support capacitor C are connected in parallel, and the chopping unit is further connected with an AC / DC module, a DC / AC module, an electric reactor unit and a power battery unit; the power battery unit comprises a plurality of groups of power modules; each power module comprises a contactor unit, a current sensor, a fuse, a power battery and a voltage sensor; each contactor unit, each current sensor and each power battery are connected in series, and the two ends of each voltage sensor are arranged at the two ends of the corresponding power battery separately; a microcomputer of the locomotive is connected with a DUC controller and a power battery management system separately; the DUC controller is connected with the DC / AC module, the chopping unit and the contactor units; and the power battery management system is connected with the contactor units. According to the grouped topological structure for the power batteries of the gas-electric hybrid locomotive, the chopping unit and the electric reactor unit are arranged, and difficult control when a plurality of groups of the power batteries are invested can be completely solved, so that the working reliability of the power battery system is ensured and the lives of the power batteries are effectively prolonged.

Description

technical field [0001] The invention belongs to the field of rail transit of locomotives and vehicles, and relates to a group topology structure of power batteries of oil-electric hybrid locomotives. Background technique [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. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a group topology...

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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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