An EMU traction system powered by hybrid power pack and energy storage device

Abstract

Disclosed is a traction system for a motor train unit hybridly powered by a power pack and an energy storage device, which system mainly comprises a power pack, an energy storage device, a traction convertor and a traction motor, wherein the traction convertor is connected to the traction motor; a diesel engine and a generator constitute the internal combustion power pack, and three phase outputs of the generator are directly connected to the traction convertor; and the energy storage device is connected to an intermediate DC bus of the traction convertor. The present invention can achieve cross-line operation, and can be suitable for different transportation demands in different environments. In a non-electrified section of railway, the mode of hybrid power supply of a power pack and an energy storage device is adopted, thereby achieving the normal operation in the condition without an overhead contact system; when the power supply capacity of the power pack is in an operating condition without an overhead contact system, a braking energy is absorbed by the energy storage device, thereby achieving the cyclic utilization of energy and reflecting the green energy-saving idea; and the power replenishment in an acceleration process of a train can be achieved via the energy storage device, thereby achieving the best acceleration performance, and since the energy storage device is adopted, the motor train unit not only has the operation capability in a non-electrified section of railway and has the functions of emergency rescue and combat readiness in special rainy and snowy weathers or in the condition where an overhead contact system is damaged, but also can 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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