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A Grounding System Applicable to Urban Rail Transit

A grounding system and protective grounding technology, applied in emergency protection circuit devices for limiting overcurrent/overvoltage, connecting contact materials, electrical components, etc., can solve problems such as excessive rail potential and rail backflow, and achieve Reduce the track potential, improve safety, and avoid the effect of transient potential increase

Active Publication Date: 2020-12-18
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a grounding system suitable for urban rail transit, aiming at making the currents on the two rails approximately equal , and effectively avoid the backflow of the rail, and protect the vehicle's weak current equipment

Method used

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  • A Grounding System Applicable to Urban Rail Transit
  • A Grounding System Applicable to Urban Rail Transit
  • A Grounding System Applicable to Urban Rail Transit

Examples

Experimental program
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Embodiment Construction

[0027] figure 1 Shown, a grounding system suitable for urban rail transit is characterized in that multiple equipotential connection lines are arranged between each car body 8 of the train 4, and the train 4 is connected to the wheel pair 9 through the working grounding device and the protective grounding device. To achieve electrical connection, the working grounding device is composed of: symmetrical working grounding points are arranged on the left and right sides of the car body, and each working grounding point is electrically connected to the switch and the carbon brush in contact with the wheel set 9 in turn; the protective grounding device The composition is as follows: symmetrical protective grounding points are arranged on the left and right sides of the car body, and each protective grounding point is electrically connected to the control switch 12, the power diode 11, and the grounding carbon brush 10 in contact with the wheel set 9;

[0028] It also has an automat...

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Abstract

A grounding system suitable for urban rail transit. The working grounding device is composed of: symmetrical working grounding points are arranged on the left and right sides of the car body, and each working grounding point is electrically connected to switches, carbon brushes and wheel sets in sequence; The grounding device is composed of: symmetrical protective grounding points are arranged on the left and right sides of the car body, and each protective grounding point is electrically connected to the control switch, power diode, grounding carbon brush and wheel set in sequence; the automatic control system is used to regulate the above two grounding points. The current of the device makes the currents on the two rails approximately equal. The protection grounding of the present invention adopts a power diode, which limits the current from flowing into the rail from the car body, avoids the damage of the weak point equipment on the car due to the return flow of the rail, and makes the currents on the two rails equal in size through the automatic control system, which improves the safety of the train sex.

Description

technical field [0001] The invention belongs to the technical field of grounding of urban rail transit, and in particular relates to a new grounding system of urban rail transit, an automatic control system and a control method. Background technique [0002] Urban rail transit is an important tool to support the urban transportation network. In recent years, the rail transit industry in many cities in my country has developed rapidly, and its construction scale has increased year by year. As a common form of urban rail transit, the subway has become one of the effective means to alleviate the prominent and increasingly severe traffic pressure problem in the process of urban development by virtue of its punctual departure, fast speed, safety and other advantages. one. [0003] When urban rail transit vehicles such as subways are running, the working current of the inverter flows back through the working ground wire to the grounding brush at the shaft end, and then flows to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/04H01R4/64
CPCH01R4/64H02H9/041H02H9/045
Inventor 肖嵩张灿李宇星吴京驰罗远培饶阳叶智宗孟举高国强吴广宁
Owner SOUTHWEST JIAOTONG UNIV
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