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Multi-energy source storage system for rail transit and energy allocation strategy

A rail transit and energy storage system technology, which is applied in the field of multi-energy energy storage systems and energy distribution strategies for rail transit, can solve the problems of low system efficiency utilization and failure to consider the loss of energy storage systems, and reduce the total Loss, the effect of improving the overall efficiency

Active Publication Date: 2016-05-11
BEIJING BEIJIAO NEW ENERGY TECH CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

At present, the energy allocation strategy used in engineering applications is logic threshold control, that is, setting the maximum charge and discharge current of lithium-ion batteries. When the energy demand of the train exceeds the current value, supercapacitors are used as supplements. This control strategy has a simple structure , easy to implement, but does not take into account the loss of the energy storage system, the overall system efficiency utilization rate is not high

Method used

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  • Multi-energy source storage system for rail transit and energy allocation strategy
  • Multi-energy source storage system for rail transit and energy allocation strategy
  • Multi-energy source storage system for rail transit and energy allocation strategy

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] Such as image 3 As shown, a kind of multi-energy energy storage system for rail transit disclosed in the present invention,

[0039] Including: lithium-ion battery pack module, super capacitor pack module, DC-DC (DC / DC) converter module, battery management system and control unit;

[0040] The lithium-ion battery pack module and the supercapacitor pack module are used to provide energy for the traction operation of the rail vehicle, and recover part of the energy when the vehicle brakes;

[0041] The lithium-ion battery pack module is composed of lithium-ion battery cells, and the supercapacitor group module is composed of supercapacitor cells;

[0042] The DC-DC converter module includes a power conversion topology circuit 1 that transmits the electric energy of the lithium-ion battery pack module to a DC bus (DCBUS),

[0043] And the power conver...

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Abstract

The invention relates to a multi-energy source storage system for rail transit and an energy allocation strategy. The multi-energy source storage system for the rail transit comprises a lithium ion battery pack module, a supercapacitor bank module, a DC / DC converter module, a battery management system and a control unit. The energy allocation strategy of the multi-energy source storage system for the rail transit comprises the following steps of carrying out charging / discharging test on a single lithium ion battery and a single supercapacitor by a charging / discharging device to obtain a mathematical model of the lithium ion battery pack module and the supercapacitor bank module; making obtained mathematical model parameters in a data table based on residual electrical quantity through linearization, and storing the data table in the control unit; calculating the minimum value of total loss of the lithium battery pack module and the supercapacitor bank module under different allocation results in real time by looking for the table, and taking the minimum value as a basis to obtain two energy allocation strategies of an energy storage component. With the multi-energy source storage system and the energy allocation strategy, the loss of the energy storage component is possibly reduced on the premise that the power utilization working condition of rail vehicle is met, and the comprehensive efficiency of the system is improved.

Description

technical field [0001] The invention relates to a multi-energy energy storage system for rail transit and an energy distribution strategy, in particular to a multi-energy energy storage system for rail transit and an energy distribution strategy based on system minimum loss control. Background technique [0002] At present, because light rail vehicles are powered by traditional traction grids, the densely arranged traction grids affect the beautification of the city, and the investment in the construction of traction grids is large, and the traction grids using uncontrolled rectification technology cannot absorb the braking energy of vehicles. The study of urban light rail vehicles without traction grid can solve the above problems and is of great significance to reduce the operating cost of urban rail transit. [0003] Installing an independent power supply on rail transit vehicles to provide energy for train operation and maintain system operation can achieve energy saving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32
CPCH02J3/32
Inventor 程龙吴健张维戈孟学东韩耸
Owner BEIJING BEIJIAO NEW ENERGY TECH CO LTD
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