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Method and system for recovering regenerative brake energy of energy storage type urban rail based on supercapacitor

A super capacitor, regenerative braking technology, applied in electric braking systems, electric vehicles, current collectors, etc., can solve the problems of low switching frequency, large size of chopper module, less application experience, etc., to ensure stable network voltage, The effect of improving versatility and flexibility

Active Publication Date: 2015-07-29
ZHUZHOU CSR TIMES ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application experience of this scheme in domestic subway operation is very little at present, so the supercapacitor energy storage type regenerative braking energy recovery device is not mature enough in topology, power module design or control system design, and has certain defects.
The DC traction network voltage of my country's urban rail power supply system is generally DC1500V standard or DC750V standard. For these two different DC traction network voltage levels, it is generally necessary to carry out corresponding scheme design for the regenerative braking energy recovery device, which is not conducive to the product mass production of
At present, the chopper module of the supercapacitor energy storage type regenerative braking energy recovery device generally has the problems of large size, low switching frequency, and cannot be hot-swapped.

Method used

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  • Method and system for recovering regenerative brake energy of energy storage type urban rail based on supercapacitor
  • Method and system for recovering regenerative brake energy of energy storage type urban rail based on supercapacitor
  • Method and system for recovering regenerative brake energy of energy storage type urban rail based on supercapacitor

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Experimental program
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Embodiment 1

[0048] Such as figure 1 As shown, the steps of the energy storage type urban rail regenerative braking energy recovery method based on supercapacitors in this embodiment include:

[0049] 1) Connect the DC traction network of the urban rail through the chopper unit 1 containing two bidirectional chopper module units 10 and the supercapacitor unit 2, and configure the connection mode of the two bidirectional chopper module units 10 according to the DC traction network. In the embodiment, when the DC traction network is DC1500V, manually configure the two bidirectional chopper module units 10 in series; initialize and set the charging voltage threshold V of the DC traction network C1 , discharge voltage threshold V F1 and the charging upper limit voltage V of the supercapacitor unit 2 C2 , discharge lower limit voltage V F2 ;

[0050] 2) Real-time monitoring of DC network voltage V 1 , supercapacitor voltage V 2 , DC bus no-load voltage V 10 , where DC network voltage V ...

Embodiment 2

[0075] This embodiment is basically the same as Embodiment 1, and the main difference is that the DC traction network is DC750V. Step 1) When configuring the connection mode of two bidirectional chopper module units 10 according to the DC traction network, the two bidirectional chopper modules The module unit 10 is manually configured as parallel connection, and its specific connection is as follows Figure 7 shown. Moreover, since the two bidirectional chopper module units 10 are manually configured to be connected in parallel, the two supercapacitor units 2 can be reduced to one; undoubtedly, it can still be constructed by using two supercapacitor units 2 as in the first embodiment Redundant energy storage mechanism.

Embodiment 3

[0077] This embodiment is basically the same as Embodiment 1, the main difference is that the chopper unit 1 also includes a network voltage adaptation switch 12 for switching the two bidirectional chopper module units 10 into series or parallel, so step 1) When the connection mode of two bidirectional chopper module units 10 is configured according to the DC traction network, specifically, the connection mode of two bidirectional chopper module units 10 is configured by operating the network voltage adaptation switch 12 . By operating the network voltage adaptation switch 12, the bidirectional chopper modules can be quickly connected in series and parallel, realizing the function of a single system adapting to DC1500V standard and DC750V standard DC traction power supply systems, reducing system costs, and making installation and commissioning easier and faster.

[0078] Such as Figure 8 As shown, the network voltage adapter switch 12 in this embodiment includes a first isol...

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Abstract

The invention discloses a method and a system for recovering regenerative brake energy of an energy storage type urban rail based on a supercapacitor. The method comprises the following steps of connecting a direct current traction network of the urban rail through a chopping unit and a supercapacitor unit, wherein the chopping unit comprises two bidirectional chopping module units; according to the connecting type of the two bidirectional chopping module units of the direct current traction network, and the voltages of the direct current network and the supercapacitor, controlling the charging and discharging of the supercapacitor unit. The system comprises the chopping unit, the supercapacitor unit, a chopping control module and a direct current isolation switch unit, wherein the chopping unit comprises the two bidirectional chopping module units which are connected in series or parallel, and each bidirectional chopping module unit comprise one or more than one bidirectional DC / DC (direct current / direct current) chopping module which is connected in parallel. The method and the system have the advantages that the regenerative brake energy of the urban rail can be recovered and fed back, and the method and the system can be applied to the common DC1500V / DC750V direct current traction networks; the universality is strong, the reliability is high, the stability is good, the production cost is low, and the flexibility is high.

Description

technical field [0001] The invention relates to a regenerative braking energy recovery technology for urban rail trains, in particular to an energy storage type regenerative braking energy recovery method and system based on a supercapacitor. Background technique [0002] In recent years, the construction of urban rail transit in my country has developed rapidly. As an important part of rail transit, urban rail power supply system, its energy consumption index is an important indicator of urban rail operation. There is an ever-increasing demand for regenerative energy. In order to promote the development of urban rail transit construction in a resource-saving, environment-friendly, green and sustainable direction, it is necessary to carry out research on the secondary energy-saving utilization system of rail transit regenerative braking energy. [0003] At present, the regenerative braking energy feedback device is more maturely applied at home and abroad, which converts the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/10B60L1/00
Inventor 陈广赞靳守杰贺文邹东张铁军陈雪刘兰张玉平易韵岚樊京路尹维恒彭秋波张小珍
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD
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