An EMU traction system with mixed power supply of catenary and energy storage device

Abstract

An EMU traction system with a hybrid power supply of catenary and energy storage device, characterized in that it mainly includes a traction transformer, an energy storage device, a traction converter, and a traction motor, and the catenary is connected to the primary side of the traction transformer through a pantograph, The two secondary windings of the traction transformer are directly connected to the traction converter, the traction converter is connected to the traction motor, and the energy storage device is connected to the intermediate DC bus of the traction converter. The invention can run on electrified lines and non-electrified lines at the same time. Under the condition of no catenary, the braking energy is absorbed by the energy storage device, which realizes energy recycling and embodies the concept of green energy saving. It has emergency rescue and combat readiness functions in special rainy and snowy weather or catenary damage, and the energy storage device can also be used as a mobile power supply.

Description

technical field [0001] The invention relates to a traction system of an EMU, in particular to an electric traction system of an EMU in which catenary and an energy storage device 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 is mainly a single electric traction, which adopts catenary power supply mode and can only run on 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 time. All EMUs with single electric traction cannot meet the requirem...

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

[0003] In addition, in the current non-electrified road sections, the traditional centralized power supply trains use the thermal power source, that is, the centralized power supply traction of internal combustion locomotives. During the braking process, the braking energy is mainly consumed by braking resistors, resulting in a huge waste of energy.

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