Offline experimental device for 25kV-grade pantograph

An experimental device and pantograph technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of maintaining 10-20A, reducing the experimental current, and not being able to provide sufficient power, so as to achieve accurate restoration Effect

Active Publication Date: 2012-07-18
BEIJING JIAOTONG UNIV
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Problems solved by technology

For the pantograph off-line experiment under the condition of AC power supply, due to the limitation of the power supply in the laboratory, when the power supply voltage is tens of volts, the current can reach hundreds of amperes; when the power supply voltage is 220V, the current does not exceed 50A; The research uses a generator for power supply, the voltage can be increased to several thousand volts, but its current can only be maintained at 10-20A
For the off-line experiment of pantograph under the condition of DC po...

Method used

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  • Offline experimental device for 25kV-grade pantograph
  • Offline experimental device for 25kV-grade pantograph
  • Offline experimental device for 25kV-grade pantograph

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Embodiment Construction

[0026] The present invention is further elaborated below in conjunction with accompanying drawing.

[0027] figure 1 Shown is the circuit principle block diagram of the present invention, figure 2 for figure 1 The schematic diagram of the trigger control unit in, as in figure 1 , figure 2 As shown, the present invention uses a 220V power supply as the input power supply, after boosted by a transformer, the discharge capacitor of the offline discharge circuit is charged to more than 25kV through a voltage doubler circuit, and the electric energy is stored in the discharge capacitor to trigger the information processing unit in the control unit After receiving the off-line signal (such as a button switch), output two trigger signals, one is a discharge signal, and the off-line discharge circuit of the pantograph is turned on by triggering the discharge control switch to complete the sinusoidal oscillation attenuation discharge process; the other is triggered by the off-line...

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Abstract

The invention discloses an offline experimental device for a 25kV-grade pantograph. The device comprises a voltage doubling circuit and a trigger control unit. The voltage doubling circuit adopts a 220V power supply, and is connected with an offline discharge circuit as an input power supply. The offline discharge circuit comprises a discharge capacitor, a discharge control switch, the pantograph, a contact line and a regulating load, which are sequentially connected. An offline control system controls the pantograph to be offline through a power unit. The trigger control unit controls the pantograph to be offline when discharge voltage is attenuated to a 25kV grade by controlling the discharge control switch and the offline control system. The sinusoidal oscillation attenuation discharge of different frequencies and different amplitudes is realized by regulating parameters of the offline discharge circuit, and the pantograph is separated from the contact line at any moment immediately when the capacitor discharges, so that a high-voltage heavy current offline phenomenon is produced to really and accurately recover realistic conditions and further make related researches.

Description

technical field [0001] The invention relates to the technical field of off-line discharge circuit for pantographs used in experiments. Specifically, the invention relates to a 25kV level pantograph off-line experimental device for simulating the off-line phenomenon of pantographs at 25kV levels under experimental conditions. Background technique [0002] During the operation of high-speed trains, due to internal factors such as catenary fluctuations and pantograph vibration aggravation, as well as external factors such as car body vibration excitation, the pantograph is separated from the contact line, resulting in the pantograph offline phenomenon. The arc discharge at the moment of off-line seriously affects the current receiving characteristics of the train pantograph; it not only ablates the contact wire and the pantograph sliding plate, shortens its service life, but also causes radio noise interference and damage to the surrounding communication lines by the high-freque...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R31/12
Inventor 刘文正龚兆丰
Owner BEIJING JIAOTONG UNIV
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