Independent series-parallel-connection modular subway regenerative braking super-capacitor energy storage device

A regenerative braking and capacitive energy storage technology, which is applied in the direction of circuit devices, battery circuit devices, collectors, etc., can solve the problem of not considering the converter module, the parallel expansion of super capacitors, and the consistency of the current sharing of super capacitors. Unable to match the number of parallel connections well and achieve the effects of strong switching ripple filtering capability, high reliability, and reduced volume

CN107040023APending Publication Date: 2017-08-11NANJING APAITEK TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-08-11

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Abstract

The invention relates to a modular subway regenerative braking super-capacitor energy storage device comprising a direct-current touch net, super-capacitor group modules and DC 750-V bidirectional DC / DC modules. The super-capacitor energy storage device is characterized in that one group of super-capacitor group modules and one group of DC 750-V bidirectional DC / DC modules are connected to form one group of regenerative braking modules. Two groups of regenerative braking modules including a first regenerative braking module and a second regenerative braking module are connected in series to the two ends of the direct-current touch net; the first regenerative braking module is connected in parallel with at least one group of regenerative braking modules; and the second regenerative braking module is connected in parallel with at least one group of regenerative braking modules. Because of the plurality of super-capacitor groups connected with each bidirectional DC / DC module independently, the direct series-parallel-connection number of the single super capacitor body is reduced; and on the basis of series connection of the direct-current-side two groups of modules of the DC 750-V bidirectional DC / DC modules, DC 1500-V application is realized and different current requirements are met by direct-current-side parallel connection of multiple groups of DC 750-V bidirectional DC / DC modules. Moreover, the modular subway regenerative braking super-capacitor energy storage device has advantages of high reliability, complete modular design, high efficiency, small size, and flexible meeting of different power needs.
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Description

technical field

[0001] The invention relates to the technical field of urban rail transit power supply systems, in particular to a modular subway regenerative braking supercapacitor energy storage device. Background technique

[0002] In recent years, my country's urban rail transit has developed very rapidly. The existing subway traction power supply method uses a diode rectifier unit to rectify 35 / 33kV medium-voltage AC power into 1500V DC, and supplies power to the traction motor on the subway train through the DC catenary. However, this power supply method can only realize the one-way power flow of electric energy from the grid to the motor, and the motor works in the generator state during the braking process, and the mechanical energy of the train is converted into electric energy. In order to ensure that the DC catenary voltage is within the safe range, the electric energy generated by train braking is basically absorbed by the resistance power consumption method, whi...

Examples

Embodiment Construction

[0027] The present invention is described below in conjunction with accompanying drawing:

[0028] An independent series-parallel modular subway regenerative braking supercapacitor energy storage device, including a DC catenary, a supercapacitor group module and a rated DC input DC750V bidirectional DC / DC module. The set of supercapacitor group modules is connected with a set of rated DC input DC750V bidirectional DC / DC modules to form a set of regenerative braking modules; two sets of regenerative braking modules connected in parallel at both ends of the DC catenary are: the first regenerative A dynamic module and a second regenerative braking module; the first regenerative braking module is connected in series with at least one set of regenerative braking modules; the second regenerative braking module is connected in series with at least one set of regenerative braking modules. The DC750V bidirectional DC / DC module includes DC fuses, DC filter inductors, DC bus capacitors, ...