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Electric train based on ground traction power supply, power supply system and control method

A technology for traction power supply systems and electric trains, applied in flexible AC transmission systems, control drives, electric vehicles, etc., can solve problems such as large weight, large volume, and increased axle load

Pending Publication Date: 2021-11-02
成都尚华电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are some problems here: one is that the AC-DC-AC traction transmission system occupies an absolute weight in the electrical equipment on the main line railway electric locomotive and bullet train, and its weight is large and the volume is large; The higher the cost, the larger the volume will occupy more valuable space for electric locomotives and bullet trains, reducing power density and efficiency

Method used

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  • Electric train based on ground traction power supply, power supply system and control method
  • Electric train based on ground traction power supply, power supply system and control method
  • Electric train based on ground traction power supply, power supply system and control method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the present embodiment provides an electric train based on ground traction power supply, including a traction motor M, a reactive power controller RPC and a reactive power compensator SVG, wherein:

[0034] The traction motor M is driven and controlled through the ground traction converter TC;

[0035] The reactive power controller RPC sends a control signal to the reactive power compensator SVG according to the running state of the traction motor M;

[0036] The reactive power compensator SVG sends out reactive current according to the received control signal to provide excitation and / or reactive power compensation for the traction motor M.

[0037] In this embodiment, the vehicle-mounted traction transformer and the vehicle-mounted traction converter are canceled, and the traction motor M is driven and controlled through the ground traction converter TC, which can effectively reduce the axle load of the electric train, increase the effectiv...

Embodiment 2

[0045] Such as figure 1 As shown, this embodiment provides a ground traction power supply system, including a traction transformer TR, a ground traction converter TC and a three-phase traction network UVW, wherein:

[0046] The primary side of the traction transformer TR is connected to the high-voltage grid GRD, and the secondary side is connected to the input port of the ground traction converter TC;

[0047] The three-phase output ports of the ground traction converter TC are respectively connected to the corresponding phase lines of the three-phase traction network UVW;

[0048] The three-phase traction network UVW is used to provide three-phase power for the electric train, and the ground traction converter TC is used to drive and control the traction motor M in the electric train through the three-phase traction network UVW.

[0049] In this embodiment, both the traction transformer TR and the ground traction converter TC are arranged outside the locomotive, such as in th...

Embodiment 3

[0053] Such as figure 1 As shown, the present embodiment provides a ground traction power supply system for an electric train, including a traction transformer TR, a ground traction converter TC, a three-phase traction network UVW, and an electric train LM. The electric train LM is internally provided with a traction motor M, Reactive power controller RPC and reactive power compensator SVG, where:

[0054] The primary side of the traction transformer TR is connected to the high-voltage power grid GRD, and the secondary side is connected to the input port of the ground traction converter TC;

[0055] The three-phase output ports of the ground traction converter TC are respectively connected to the corresponding phase lines of the three-phase traction network UVW;

[0056] The electric train LM takes three-phase power from the three-phase traction network UVW through the three-phase current receiving device CC, and provides the three-phase power to the traction motor M, reactiv...

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Abstract

The invention provides an electrical train based on ground traction power supply. The electrical train comprises a traction motor and a reactive power compensator connected with the traction motor, and the traction motor is driven and controlled through a ground traction converter; and the reactive power compensator emits reactive current according to the operation state of the traction motor and provides excitation and reactive power compensation for the traction motor. The traction motor in the electric train is driven and controlled by the ground traction converter, so that a vehicle-mounted traction converter and a vehicle-mounted traction transformer are omitted, and the reactive power compensator for providing excitation and reactive power compensation for the traction motor is arranged in the electric train, so that the axle load of the electrical train can be effectively reduced, the effective space of the electrical train is improved, the running speed and efficiency of the electrical train are improved, and the power factor of the electrical train and the power transmission distance of a three-phase traction network can be improved.

Description

technical field [0001] The invention relates to the technical field of AC electrified railway power supply, in particular to an electric train based on ground traction power supply, a power supply system and a control method. Background technique [0002] The current electric train is powered by a power frequency single-phase AC power supply system. On the electric locomotive and bullet train of the electric train, electrical equipment occupies an important position, the most important of which is the AC-DC-AC traction drive system. The AC-DC-AC traction drive system consists of a vehicle-mounted traction transformer, a vehicle-mounted traction converter and a traction motor in series. It drives the traction motor and changes the speed of the traction motor through frequency modulation and voltage regulation to achieve the purpose of driving and speed-regulating operation of electric trains. This process is called Drive for electric train. Usually, in reality, the driving o...

Claims

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Application Information

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IPC IPC(8): B60M3/00B60L15/20H02J3/12H02J3/18
CPCB60M3/00B60L15/20H02J3/12H02J3/18B60L2200/26B60L2240/427B60L2240/429Y02T10/72Y02E40/10
Inventor 吴波王永建何晓燕李毅
Owner 成都尚华电气有限公司
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