Multi-source multi-current system electric locomotive traction transmission system topology based on vehicle-mounted hybrid energy storage

A technology for electric locomotives and traction drives, which is applied to the traction of AC induction motors, electric vehicles, electrical components, etc., and can solve problems such as low transportation efficiency, reduced volume and weight, and single energy transmission methods

Active Publication Date: 2021-07-30
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a multi-source multi-stream electric locomotive traction drive system topology based on vehicle-mounted hybrid energy storage, which reduces the volume and weight of the overall structure of the

Method used

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  • Multi-source multi-current system electric locomotive traction transmission system topology based on vehicle-mounted hybrid energy storage
  • Multi-source multi-current system electric locomotive traction transmission system topology based on vehicle-mounted hybrid energy storage
  • Multi-source multi-current system electric locomotive traction transmission system topology based on vehicle-mounted hybrid energy storage

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Embodiment 1

[0040] This embodiment provides a multi-source and multi-stream electric locomotive traction drive system topology based on vehicle-mounted hybrid energy storage, such as figure 1 As shown, including: AC pantograph (1), DC pantograph (2), AC main circuit breaker (3), DC main circuit breaker (4), traction transformer (5), DC smoothing reactor (6 ), grid side rectifier (7), power battery (8), supercapacitor (9), energy storage converter for power battery (10), energy storage converter for supercapacitor (11), DC link (12) , a traction inverter (13), an auxiliary converter (14), a traction motor system (15), auxiliary equipment (16) and several switch units.

[0041] The first end of the AC pantograph (1) is connected to the catenary of the AC traction power supply, the second end is connected to the high-voltage side end of the traction transformer (5) through the AC main circuit breaker (3), and the traction transformer (5) The other end of the high-voltage side is connected ...

Embodiment 2

[0082] The topology of the multi-source and multi-stream electric locomotive traction drive system based on vehicle-mounted hybrid energy storage provided in this embodiment is as follows: image 3 , Figure 4 As shown, the difference from Embodiment 1 is that the second end of the DC smoothing reactor (6) does not need to pass through the switches S4, S5, S6, and S7 to multiplex the grid-side transformer as a DC / DC chopper before outputting to the DC link, but directly to the DC link (12) by closing switch S12.

[0083] In Embodiment 2, the secondary filtering branch includes a fourth inductance L4, a fifth inductance L5, and a capacitor C R '; A switch S13 is connected in parallel with both ends of the fourth inductance L4. If the power is supplied by the catenary of the DC traction power supply, the switch S12 is closed; if the power is supplied by the catenary of the AC traction power supply, the switch S12 is turned off, and the switch state of the switch S13 is determi...

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Abstract

The invention discloses a multi-source multi-current system electric locomotive traction transmission system topology based on vehicle-mounted hybrid energy storage, which comprises a traction load part and a traction electric energy input part which are coupled through a direct current link; the traction electric energy input part comprises an alternating current traction network, a direct current traction network and a vehicle-mounted hybrid energy storage system, a traction transformer low-voltage side winding in a topological structure of an alternating current power supply system is reused as a direct current advection reactor in the direct current power supply system, and a grid-side rectifier and a secondary filtering branch in the topological structure of the alternating current power supply system are reused as a DC/DC chopper in the direct current power supply system, so that the voltage of a direct current link is stable and controllable in any power supply system, the number of devices of the multi-source multi-current system electric locomotive traction transmission system topology is reduced, the size and the weight are further reduced, and the cost is saved; in addition, the defects that a traditional multi-current traction transmission system is single in energy transmission mode and low in transportation efficiency are overcome, the fault ride-through capacity of the system is enhanced, and reliability is improved.

Description

technical field [0001] The invention relates to the technical field of rail transit traction drive electric energy conversion, in particular to a multi-source and multi-stream electric locomotive traction drive system topology based on vehicle-mounted hybrid energy storage. Background technique [0002] Due to different reasons such as history and transportation needs, there are currently many power supply systems for rail transit in the world. Among them, the mainstream traction power supply systems include AC 25kV / 50Hz and 60Hz, AC 15kV / 16.7Hz, DC 3kV and DC 1.5kV. At the beginning of the establishment of the standard rail transportation system, they operated independently of each other. However, as the demand for transnational and cross-regional transportation markets continues to expand, while reducing infrastructure construction costs and improving transportation efficiency, multi-stream electric locomotives that can span different power supply systems Rapid development...

Claims

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Application Information

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IPC IPC(8): B60L9/30H02J5/00H02M7/72
CPCB60L9/30H02J5/00H02M7/72H02J2207/20H02J2207/50Y02T10/72
Inventor 许加柱刘裕兴项锦文
Owner HUNAN UNIV
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