Motor train unit traction system powered by power packs and energy storage devices in mixed mode

Abstract

A motor train unit traction system powered by power packs and energy storage devices in a mixed mode mainly comprises the power packs, the energy storage devices, traction converters and traction motors, wherein the traction converters are connected with the traction motors, a diesel engine and an electric generator form each internal combustion power pack, three-phase output of the electric generators are directly connected with the traction converters, and the energy storage devices are connected with middle direct-current buses of the traction converters. The motor train unit traction system can achieve cross-line running and meet different requirements for transportation in different environments. In a non-electrification road section, the power pack and energy storage device mixed power supply mode is adopted so that normal running under the working condition without a contact system can be achieved. Under the working condition that power is supplied by the power packs and no contact system exists, braking energy is absorbed through the energy storage devices, and therefore recycling of energy is achieved and the green energy saving concept is embodied. Power supplying can be achieved in the acceleration process of a train through the energy storage devices so that the optimum acceleration performance can be achieved. Due to the adoption of the energy storage devices, a power train unit can have the operating capacity in the non-electrification road section and have an emergency rescue function and a war preparedness function in special rainy and snowy days or under the condition that the contact system is damaged, and 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 a power pack 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 requ...

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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