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A multi-source and multi-stream electric locomotive traction drive system topology

An electric locomotive and traction drive technology, applied in the traction of AC induction motors, electric vehicles, power management and other directions, can solve the problems of low transportation efficiency, single energy transmission mode, reduced size and weight, etc., to reduce the number of equipment and save Cost, effect of reducing size and weight

Active Publication Date: 2022-05-24
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 multi-source multi-stream electric locomotive traction drive system and overcomes the traditional multi-stream system. Traction drive system has the disadvantages of single energy transmission mode and low transportation efficiency

Method used

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  • A multi-source and multi-stream electric locomotive traction drive system topology
  • A multi-source and multi-stream electric locomotive traction drive system topology
  • A multi-source and multi-stream electric locomotive traction drive system topology

Examples

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Embodiment 1

[0040] This embodiment provides a multi-source and multi-stream electric locomotive traction drive system topology based on on-board hybrid energy storage, such as figure 1 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), super capacitor (9), power battery energy storage converter (10), super capacitor energy storage converter (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 AC traction power supply catenary, and the second end is connected to the high-voltage side end of the traction transformer (5) through the AC main circuit breaker (3). The other end of the high-voltage side is connected to the wheel and rail; the low-voltage side of the t...

Embodiment 2

[0082] The topology of the multi-source multi-stream electric locomotive traction drive system based on on-board hybrid energy storage provided by this embodiment, such as 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 use the multiplexed grid-side transformer as a DC / DC chopper through switches S4, S5, S6, and S7 before outputting To the DC link, but directly output to the DC link (12) by closing the switch S12.

[0083] In this embodiment 2, the secondary filter branch includes a fourth inductor L4, a fifth inductor L5, and a capacitor C connected in series in sequence R '; A switch S13 is connected in parallel at both ends of the fourth inductor L4. If powered by the DC traction power supply contact line, the switch S12 is closed; if the AC traction power supply contact line is powered, the switch S12 is open, and the switch S13 determines the switch state according to the frequency o...

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Abstract

The invention discloses a multi-source and multi-flow system electric locomotive traction drive system topology based on vehicle-mounted hybrid energy storage, which includes a traction load part and a traction power input part, which are coupled through a DC link; the traction power input part includes an AC traction network , DC traction network and vehicle hybrid energy storage system, by multiplexing the low-voltage side winding of the traction transformer in the AC power supply system topology as the DC smoothing reactor in the DC power supply system, and multiplexing the grid-side rectifier in the AC power supply system topology And the secondary filter branch is used as the DC / DC chopper in the DC power supply system, so that the DC link voltage is stable and controllable under any power supply system, reducing the number of devices in the topology of the multi-source and multi-current electric locomotive traction drive system, and then Reduce volume and weight, save cost; in addition, it overcomes the shortcomings of single energy transmission mode and low transportation efficiency of the traditional multi-stream traction drive system, enhances the fault ride-through capability of the system, and improves reliability.

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 on-board hybrid energy storage. Background technique [0002] Due to different reasons such as history and transportation needs, there are various power supply systems for rail transit in the world. The mainstream traction power supply systems include AC 25kV / 50Hz and 60Hz, AC 15kV / 16.7Hz, and DC 3kV and DC 1.5kV. At the beginning of the establishment of the standard rail transportation system, they operated independently of each other, but with the continuous expansion of the needs of the transnational and cross-regional transportation market, at the same time, the construction cost of infrastructure is reduced, and the transportation efficiency is improved. rapid development. [0003] For my country, the expansion of urban circles, inter-ci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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