Motor train unit traction system powered up by overhead contact system and power pack in combined mode

Abstract

A motor train unit traction system powered up by a overhead contact system and a power pack in a combined mode is characterized by mainly comprising a traction transformer, the power pack, a traction converter, a traction motor and a braking resistor, wherein the overhead contact system is connected with a primary side of the traction transformer through a pantograph, two secondary side windings of the traction transformer are directly connected with the traction converter, the traction converter is connected with the traction motor, a diesel engine and a power generator form the power pack, and three-phase output of the power generator is directly connected with the traction converter. The motor train unit traction system powered up by the overhead contact system and the power pack in the combined mode can achieve overline operation and can meet different conveying requirements in different environments. At a non-electric railway section, a power pack power supplying mode is adopted, and normal operation under the condition without the overhead contact system is achieved. Due to the adoption of two sets of power systems, a motor train unit not only has the operating capacity at the non-electric railway section, but also has the functions of emergency rescue and war preparedness in special rainy or snowy weather or when the overhead contact system is damaged.

Description

technical field [0001] The invention relates to a motor train traction system, in particular to a motor train electric traction system in which catenary and a power pack are mixed to supply power. Background technique [0002] The traction system is the core of the transmission system of the EMU, and it shoulders the task of providing driving power for the train. The traditional EMU traction system mainly adopts catenary power supply mode for single electric traction, which can only run on electrified railways, or adopts single thermal power source traction and runs on non-electrified railways. According to my country's railway planning, by the end of 2012, my country's electrified railways accounted for 53% of the country's railway lines; according to the "Medium and Long-Term Railway Network Planning", it is estimated that by 2020, electrified railways will account for 60% of the country's railway lines, and non-electrified railways will still a large proportion for a long...

AI Technical Summary

Problems solved by technology

All EMUs with single electric traction cannot meet the requirements of running on non-electrified railways, and cannot perform self-rescue in time when the electrified section fails or the high-voltage system of the vehicle itself fails

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