Direct current high-voltage boxes, double-system-type high-voltage traction system and electric bullet train set

Abstract

The invention provides direct current high-voltage boxes, a double-system-type high-voltage traction system and an electric bullet train unit. The input ends of circuits of the direct current high-voltage boxes are connected with pantographs through selection isolating switches, and the first output ends of the circuits of the direct current high-voltage boxes are connected with a direct current traction system of a train, so that the train can support a direct-current-system-type power supply mode. Further, by arranging the circuits in box bodies, all high-voltage devices in the circuits arenot exposed in air, accordingly, the adverse influences of environment factors on high-voltage equipment can be avoided, the reliability of the high-voltage system is improved, and the service life ofthe high-voltage system is prolonged; meanwhile, the area of the occupied area of a train roof can be saved, and the effective utilization rate of the in-train space is increased; and wind noise andresistance during operation of the train can be reduced, and aerodynamic performance is improved.

Description

technical field [0001] The invention relates to the field of electrical technology, in particular to a DC high-voltage box, a dual-mode high-voltage traction system and an electric train set. Background technique [0002] The function of the train high-voltage system is to obtain electric energy from the pantograph for the train and realize electric energy distribution, transmission and related protection functions. In order to meet the needs of cross-border interconnection, intercity / urban EMUs with AC and DC dual-mode capabilities have emerged at home and abroad. The speed of these EMUs is usually below 160 kilometers per hour. By setting up dual-mode AC-DC high-voltage systems for trains , so that the train can meet the operation requirements of different grid systems. [0003] In the prior art, the AC-DC high-voltage system supporting dual systems generally includes a plurality of high-voltage equipment, and the high-voltage equipment is scattered on the outside of the ...

AI Technical Summary

Problems solved by technology

[0004] However, the speed of the next generation of high-speed EMUs will reach more than 400 kilometers per hour, with the characteristics of wide operating area span and complex natural environment

If the above-mentioned AC / DC high-voltage system is used, the high-voltage equipment scattered on the roof will be exposed to the air for a long time. Affected by environmental factors such as smog, rain and snow, the high-voltage equipment is prone to breakdown or flashover, making the high-voltage The reliability of the system is reduced, and the life and stability of the high-voltage system cannot be guaranteed

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