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Multi-system train power supply system and control method thereof

A power supply system, multi-stream system technology

Inactive Publication Date: 2020-03-10
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that the existing train power supply system cannot meet the application needs of multi-voltage systems, the present invention provides a multi-current system train power supply system and its control method

Method used

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  • Multi-system train power supply system and control method thereof
  • Multi-system train power supply system and control method thereof
  • Multi-system train power supply system and control method thereof

Examples

Experimental program
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Embodiment 1

[0047] This embodiment mainly explains the circuit structure of the multi-stream train power supply system. figure 1 A schematic circuit structure diagram of a multi-stream train power supply system according to an embodiment of the present invention is shown. Such as figure 1As shown, the multi-stream train power supply system in this embodiment mainly includes: a traction transformer 5, a PWM (Pulse Amplitude Modulation, pulse width modulation) rectifier 7, an intermediate support capacitor C1, multiple step-down choppers 3, a transmission control unit and All are controlled by the AC circuit breaker KM1, the first DC circuit breaker KM2, the second DC circuit breaker KM7, the first isolation switch QS1, the second isolation switch QS2, the third isolation switch QS3, and the AC circuit breaker of the transmission control unit. A pre-charging unit 6 , a DC pre-charging unit 1 , a DC filter inductor 2 and an LC filter circuit 4 .

[0048] refer to figure 1 , the primary si...

Embodiment 2

[0061] Combine below image 3 Describe the control method to make the multi-stream train power supply system work in the AC25kV / 50Hz AC power supply mode. Such as image 3 As shown, the method for controlling the multi-stream train power supply system according to this embodiment mainly includes steps S101 to S103.

[0062] In step S101 , the AC circuit breaker KM1 and the first isolating switch QS1 in the multi-stream train power supply system are controlled to be closed.

[0063] In step S102 , the first DC circuit breaker KM2 , the second DC circuit breaker KM7 , the second isolating switch QS2 and the third isolating switch QS3 in the multi-current train power supply system are controlled to be turned off.

[0064] In step S103, the first terminal of the AC circuit breaker KM1 is controlled to be connected to an AC power supply line whose power supply mode is AC25kV / 50Hz, so that the multi-stream train power supply system works in the AC25kV / 50Hz AC power supply mode.

...

Embodiment 3

[0068] Combine below Figure 4 Describe the control method to make the multi-stream train power supply system work in the AC15kV / 16.7Hz AC power supply mode. Such as Figure 4 As shown, the method for controlling the multi-stream train power supply system according to this embodiment mainly includes steps S201 to S203.

[0069] In step S201, the AC circuit breaker KM1 and the second isolating switch QS2 in the multi-stream train power supply system are controlled to be closed.

[0070] In step S202, the first DC circuit breaker KM2, the second DC circuit breaker KM7, the first isolating switch QS1 and the third isolating switch QS3 in the multi-current train power supply system are controlled to be turned off.

[0071] In step S203, the first end of the AC circuit breaker KM1 is controlled to be connected to an AC power supply line whose power supply mode is AC15kV / 16.7Hz, so that the multi-stream train power supply system works in the AC15kV / 16.7Hz AC power supply mode.

...

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Abstract

The invention discloses a multi-system train power supply system and a control method thereof. In the system, the primary side of a traction transformer is connected with at least one AC power supplyline through an AC circuit breaker; a first tap on the secondary side of the traction transformer is connected with the AC input end of a PWM rectifier through a first isolation change-over switch; the DC output end of the PWM rectifier is connected with a load through a multi-step-down chopper; the DC output end is connected with a middle supporting capacitor in parallel; a a second tap on the secondary side of the traction transformer is connected with the AC input end of the PWM rectifier through a second isolation change-over switch; the first end of the first DC circuit breaker is connected with at least one DC power supply line; the second end of the first DC circuit breaker is connected with the DC output end of the PWM rectifier through the second DC circuit breaker; The first endof the third isolation change-over switch is grounded; and the second end of the third isolation change-over switch is connected with the DC output end of the PWM rectifier. Railway transportation under different power supply systems can be met, and therefore the requirements of different application conditions are met.

Description

technical field [0001] The present disclosure relates to the field of train power supply, in particular to a multi-stream train power supply system, and also relates to a control method for the multi-stream train power supply system. Background technique [0002] The train power supply system is mainly used in the power supply of railway passenger trains. The power supply of passenger trains in my country's railways is generally rectified by the locomotive from the AC input from the grid into DC, and provides DC600V DC power supply voltage to each compartment of the passenger train, and each compartment converts the DC voltage into the required form of electrical energy. [0003] At present, domestic AC drive locomotives can only operate under one grid voltage system (ie 25kV / 50Hz on the trunk line). With the liberalization of railway freight, a single power supply standard train power supply system cannot meet the application requirements. In countries and regions such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/10H02M7/04
CPCH02M1/10H02M7/04H02M1/0083
Inventor 李华刘永江彭自坚范斌冯秋实易万成唐邕浦陈湘李自然
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD
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