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Oscillation restraining method and device for train traction system

A traction system and train technology, applied in control devices, transportation and packaging, traction of DC motors, etc., can solve problems such as output torque ripple of traction motors

Active Publication Date: 2018-10-16
CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a vibration suppression method and device for a train traction system to solve the matching problem between the traction systems of different equipment suppliers in urban rail transit and between the traction system and the traction power supply system, and eliminate the The mismatch of the traction motor causes the output torque pulsation of the traction motor, which improves the operation safety and passenger comfort of the urban rail transit traction system

Method used

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  • Oscillation restraining method and device for train traction system
  • Oscillation restraining method and device for train traction system
  • Oscillation restraining method and device for train traction system

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Embodiment 1

[0080] Such as figure 1 as shown, figure 1 It is a schematic flowchart of the suppression method of the embodiment of the present invention. An embodiment of the present invention provides a vibration suppression method for a train traction system, the suppression method comprising:

[0081] 110. Obtain the input traction voltage of the train traction converter, the supporting capacitor side voltage, the input current, and the current first traction braking level signal of the train;

[0082] 120. Perform band-pass filtering on the input traction voltage, the voltage on the supporting capacitor side, and the input current respectively to obtain the characteristic content corresponding to the input traction voltage, the voltage on the supporting capacitor side, and the input current, and perform Calculate the distortion degree of the input traction voltage of the converter, the distortion degree of the supporting capacitor side voltage, and the distortion degree of the input ...

Embodiment 2

[0093] On the basis of Embodiment 1, in this embodiment, band-pass filtering is performed on the input traction voltage, the supporting capacitor side voltage, and the input current to obtain the corresponding characteristic content, and according to the corresponding Calculating the distortion degree of the input traction voltage of the converter, the distortion degree of the supporting capacitor side voltage, and the distortion degree of the input current of the characteristic content respectively includes:

[0094] The degree of distortion of the input traction voltage is calculated by the following formula:

[0095]

[0096] Among them, σU grid is the distortion degree of the input traction voltage of the converter, is the characteristic content of the input traction voltage of the converter whose frequency is within the first frequency range, is the characteristic content of the input traction voltage of the converter whose frequency is within the second frequency ...

Embodiment 3

[0107] On the basis of Embodiment 1 or Embodiment 2, the judgment in this embodiment whether it is necessary to adjust the output torque of the traction motor specifically includes:

[0108] When any one of the degree of distortion of the input traction voltage, the degree of distortion of the supporting capacitor side voltage, and the degree of distortion of the input current exceeds a first preset value, it is necessary to adjust the output torque of the traction motor;

[0109] When the degree of distortion of the input traction voltage, the degree of distortion of the voltage at the side of the supporting capacitor and the degree of distortion of the input current are all less than a second preset value, it is not necessary to adjust the output torque of the traction motor. Wherein, the first preset value may be 8%, and the second preset value may be 3%.

[0110] Specifically, when the distortion degree of the input traction voltage of the converter, the distortion degree ...

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Abstract

The invention provides an oscillation restraining method and device for a train traction system. The oscillation restraining method comprises the steps that the distortion degree of the input tractionvoltage, the distortion degree of the supporting capacitor side voltage and the distortion degree of the input current of a current transformer are calculated; according to the distortion degree of the input traction voltage, the distortion degree of the supporting capacitor side voltage and the distortion degree of the input current, a first traction brake level signal is corrected, and thus a second traction brake level signal is obtained; and according to the second traction brake level signal, the output torque of a traction motor is adjusted. According to the oscillation restraining method and device for the train traction system, characteristic contents corresponding to the input traction net voltage, the supporting capacitor side voltage and the input direct current of the tractioncurrent transformer in the train traction system are monitored, the distortion degrees of the corresponding net voltage, the corresponding voltage and the corresponding current are calculated according to the corresponding characteristic contents, the backward stage output torque of the traction current transformer is finely adjusted according to the distortion degrees, and accordingly oscillation on the direct current side of the traction system is restrained.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a vibration suppression method and device for a train traction system. Background technique [0002] With the increase of passenger flow and departure density of urban rail transit system, the demand for urban rail transit trains is increasing day by day, and the complexity of urban rail transit system is increasing day by day. On the one hand, most of the large-capacity urban rail transit lines in my country currently have a situation where trains with different traction system topologies and control characteristics coexist and run together. Lines built in the same city in different periods also require cross-line operation. There are unavoidable matching problems between the traction systems of suppliers and between the traction system and the traction power supply system; on the other hand, there is a tight coupling relationship between the urban rail transit traction p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L9/04B60L15/20
CPCB60L9/04B60L15/20B60L2200/26B60L2240/423Y02T10/72
Inventor 白锡彬刘贺江由振忠王永张泽邓九鹏
Owner CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP
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