Multi-power-source rail vehicle and main and auxiliary transmission system and method thereof

Abstract

The invention discloses a multi-power-source rail vehicle and a main and auxiliary transmission system and method thereof. The multi-power-source rail vehicle comprises a power supply system, an intermediate direct-current link, a traction inverter, a traction motor and an auxiliary system which are sequentially connected, and the power supply system comprises a diesel generator power supply system, a power grid power supply system and a power battery power supply system; and the auxiliary system is connected to the power battery power supply system. The auxiliary system takes power from the power battery power supply system. The invention breaks through the inherent operation modes of internal combustion and electric locomotives. When the railway vehicle runs on an electrified line, the locomotive can be powered by a contact power grid; and when running on a non-electrified line, the power is supplied by the power battery and the diesel generator set. And the grid section and the non-grid section are effectively connected, so that the electrochemical section and the non-electrochemical section achieve an integrated mode. Meanwhile, the auxiliary system is connected to the power battery power supply system, and the voltage class of the power battery loop is lower than that of the intermediate direct-current link, so that the voltage-withstanding class of the auxiliary system isreduced.

Description

technical field [0001] The invention relates to the technical field of rail vehicles, in particular to a multi-power source rail vehicle and its main and auxiliary transmission system and method. Background technique [0002] At present, diesel locomotives are generally used for shunting locomotives used for branch line transportation or shunting operations. Whether they work in areas with electricity or without electricity, they rely on internal combustion engine power to pull trains to run or work, which consumes a lot of fuel. , and cause greater pollution to the environment; at the same time, with the rapid development of the rail transit industry, hybrid rail vehicles have become a research hotspot. Some railway lines in my country are still in the state of not erecting power grids, and trains cannot run continuously between sections with and without grids. Hybrid rail vehicles at home and abroad often use a hybrid form of internal combustion engine and power battery, a...

AI Technical Summary

Problems solved by technology

[0005] 2. The redundancy is not good. When the diesel engine fails, the locomotive cannot work normally;

[0006] 3. The ground charging places for hybrid locomotives are limited, and the power battery can only be charged in places with charging power sources and charging equipment. It is necessary to set up a dedicated charging power source on the ground. The charging power is limited by the capacity of the charging power source, and only small current and slow Fast charging, if high-power charging is required, a large-capacity power grid dedicated line needs to be built to meet the high-power fast charging requirements

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