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Alternating current-direct current switching high-voltage system of double current vehicle

A high-voltage system, AC-DC conversion technology, applied in the direction of vehicle components, railway vehicles, motor vehicles, etc., can solve the problems of high use cost, poor safety, high manufacturing cost, etc., to save manufacturing cost and use cost, improve safety, The effect of reducing the weight of equipment

Pending Publication Date: 2019-12-03
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems of high manufacturing cost, high use cost and poor safety of the dual-system power supply system in the prior art, and provide a safe, reliable and low-use dual-system vehicle AC-DC switching high voltage system

Method used

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  • Alternating current-direct current switching high-voltage system of double current vehicle
  • Alternating current-direct current switching high-voltage system of double current vehicle

Examples

Experimental program
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Embodiment 1

[0075] In this embodiment, the DC power supply is DC1500V and the AC power supply is AC25kV as an example, wherein the DC power supply of DC1500V provides DC power for the traction converter 205 to finally drive the traction motor 206, and the AC power supply of AC25kV is stepped down by the traction transformer 204. After voltage, the AC power is provided for the traction converter 205 to finally drive the traction motor 206 .

[0076] Taking the aforementioned DC power supply of DC1500V and AC power supply of AC25kV as an example, the AC and DC pantographs 2 in this embodiment are DC1500V pantographs and AC25kV pantographs;

[0077] The AC fuse 303 in the corresponding circuit is an AC25kV fuse; the DC fuse 402 is a DC1500V fuse.

[0078] Wherein, the input end and the output end of the traction transformer 204 in this embodiment are respectively connected with a current transformer 302 .

Embodiment 2

[0080] see figure 2 As shown, Embodiment 2 of the present invention also specifically discloses the power supply method of the AC-DC switching high-voltage system of the dual-current system vehicle. The power supply method mainly includes the following steps:

[0081] S101, the AC / DC pantograph 2 is in contact with the external catenary 1 to receive AC or DC power;

[0082] S102. The grid voltage transformer 201 monitors the voltage amplitude and frequency to identify the AC or DC pantograph 2 receiving AC or DC power;

[0083] S103. After the grid voltage transformer 201 identifies the power receiving condition of the AC / DC pantograph 2, it sends an identification instruction to the controller, and the controller sends an instruction signal to the AC / DC conversion switch 203 according to the received identification instruction;

[0084] S104. If the recognition command received by the controller is AC power, the controller controls the AC-DC conversion switch 203 to communi...

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Abstract

The invention discloses an alternating current-direct current switching high-voltage system of a double current vehicle. The alternating current-direct current switching high-voltage system comprisesan alternating current-direct current pantograph, a network voltage mutual inductor and a vacuum circuit breaker. The network voltage mutual inductor recognizes the alternating current-direct currentpantograph according to the monitored voltage amplitude and frequency to receive alternating currents or direct currents, and the vacuum circuit breaker turns on or off a main switch of a power source. The system further comprises an alternating current circuit, a direct current circuit, an alternating current-direct current switching switch and arresters. The power supply output end of the systemis connected with a traction transformer and traction converters. According to the alternating current-direct current switching system, the alternating current circuit and the direct current circuitare integrated, circuit protection devices are designed on a main circuit, the alternating current circuit and the direct current circuit, over-voltage protection is achieved in the alternating current-direct current power supply switching process, and safety is improved; and meanwhile, the pantograph, the network voltage mutual inductor, the vacuum circuit breaker, the traction converters and traction motors of the system are common devices, and the manufacturing cost and the use cost are greatly saved.

Description

technical field [0001] The invention relates to the technical field of rail transit power supply systems, in particular to an AC-DC switching high-voltage system for dual-current vehicles. Background technique [0002] At present, domestic rail transit generally adopts two power supply systems. Urban rail lines usually have short lines and small station spacing. Combined with economic benefits and the characteristics of quick start and stop of vehicles, general urban rail vehicles use DC1500V power supply; on the contrary, national railways The line is long, the station distance is long, and the line loss is large, so the national railway vehicles use AC25kV power supply. [0003] With the development of urban and rural construction, there is an urgent need to establish a fast track connecting "central cities" and "suburban cities". The scope of urban rail transit continues to expand, and urban railways for connecting central cities and satellite cities and between satellite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/00B60L9/00
CPCB60L15/007B60L9/00B60L2210/30B60L2200/26B60L2210/40Y02T10/64
Inventor 李雪飞张玉光赵志强
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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