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Train body-shaft end circulating current suppression method suitable for high-speed train grounding system

A technology for grounding systems and high-speed trains, which is applied in the field of mobile grounding for high-speed trains, and can solve problems such as abnormal heating and interference

Active Publication Date: 2021-07-06
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims at the "car body-axle end" circulation problem existing in the existing high-speed EMU grounding system, in order to solve the "car body-axle end" circulation, and avoid the on-board equipment being disturbed by the car body circulation, abnormal heating and grounding carbon Brush abnormal wear, reduce damage caused by surge voltage generated by overvoltage, and improve train grounding performance

Method used

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  • Train body-shaft end circulating current suppression method suitable for high-speed train grounding system
  • Train body-shaft end circulating current suppression method suitable for high-speed train grounding system
  • Train body-shaft end circulating current suppression method suitable for high-speed train grounding system

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] The "vehicle-station-network" system of the present invention is as figure 2 , image 3 As shown, it includes a traction substation 1, a catenary 2 for transmitting electric energy, a pantograph 3 for taking current from the catenary 2, a transformer primary side front-end cable 14 for current circulation, and a transformer primary side rear The end cable 16 and the roof high-voltage cable 4, the working ground shaft 7 for discharging the traction current, and the rail 5 for the return of the traction current constitute the overall flow receiving and returning path of the train.

[0025] The current receiving, grounding and return process of the train during normal working conditions: the current is transmitted from the traction substation 1, and the current is transmitted through the catenary 2, and the EMU lifts ...

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Abstract

The invention discloses a train body-shaft end ring current suppression method for a high-speed train grounding system, which specifically comprises the following steps of: detecting positive and negative phases of traction current through an IGBT (Insulated Gate Bipolar Translator) driving signal generation system, and generating positive and negative square wave pulses to control the on-off of a right channel IGBT switch and a left channel IGBT switch in a current direction measurement and control device; and changing the protection grounding shaft into a one-way conduction path, so that traction backflow on the steel rail is completely isolated from the carriage. According to the invention, the harm caused by'car body-shaft end 'circulation is greatly reduced, the car body is always connected with the steel rail, and the car body is always kept at zero potential.

Description

technical field [0001] The invention belongs to the technical field of mobile grounding of high-speed trains, and in particular relates to a "car body-shaft end" circulation suppression method suitable for a high-speed train grounding system. Background technique [0002] With the rapid development of my country's high-speed railway industry, more and more high-speed railway lines have been built and put into operation in China, and many problems related to grounding have gradually been exposed. [0003] At present, domestic high-speed trains all use catenary power supply. After the current is taken by the pantograph, the current flows through the on-board traction transformer, rectification and inverter equipment, etc. to convert the electric energy provided by the traction substation into the kinetic energy of the train. The vehicle dynamic grounding system consists of working grounding and protective grounding; the working grounding is connected to the outlet of the prima...

Claims

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Application Information

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IPC IPC(8): H02H9/08H02H9/04
CPCH02H9/045H02H9/08
Inventor 肖嵩童梦园李玉航侯浩申仪想周杰吴广宁高国强靳耀耀刘杰叶智宗
Owner SOUTHWEST JIAOTONG UNIV
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