Vehicle-mounted hybrid energy storage system of railway vehicle and application of vehicle-mounted hybrid energy storage system

Abstract

The invention relates to a vehicle-mounted hybrid energy storage system of a railway vehicle and application of the vehicle-mounted hybrid energy storage system. The system comprises a lithium ion battery set module, a super-capacitor set module and a reconstructive type traction current transformer module, and the reconstructive type traction current transformer module comprises a traction current transformer; and a main circuit of the traction current transformer is formed by additionally arranging contractors S1, S2, S3, S4 and S5 and a filter inductor L on a main circuit of a traditional traction current transformer. When a train operates, the super-capacitor set module supplies power for the train through the traction current transformer; when the train pulls in and parks, the traction current transformer is reconstructed into a direct current-direct current transformer through powering on and powering off of the different contractors, and energy is transmitted to the super-capacitor set module from the lithium ion battery set module through the current transformer so as to charge energy needed by operation of a vehicle of a next station. The vehicle-mounted hybrid energy storage system of the railway vehicle does not need extra direct current-direct current transformers, and the manufacturing cost, the space cost, the complex rate and the like of the whole system are reduced.

Description

technical field [0001] The invention relates to a vehicle-mounted hybrid energy storage system of a rail vehicle and an application thereof. Background technique [0002] Rail transit mainly refers to a series of transportation methods such as subway, light rail, sky rail train, tram and maglev train. With the rapid and sustainable development of the economy and the acceleration of urbanization, the city's demand for transportation is getting higher and higher. Urban rapid rail transit is characterized by its small footprint, low energy consumption, low environmental pollution, large transportation volume, and fast driving speed. , high safety and reliability, punctual comfort and other characteristics have won people's favor. [0003] At present, light rail vehicles are powered by the traditional traction power supply network, and the densely arranged traction line network affects the beautification of the city, and the investment in the construction of the traction networ...

AI Technical Summary

Problems solved by technology

But two DC-DC converters make the whole on-board hybrid energy storage system more complicated and expensive

[0008] As mentioned above, in addition to the energy storage element lithium-ion battery pack and super capacitor pack, the above existing topologies require an additional DC-DC converter module to charge and discharge the corresponding energy storage elements, that is, to extract energy or release energy , increasing the overall cost, volume cost and complexity of the vehicle-mounted hybrid energy storage system

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