Grounding system suitable for urban rail transit

Abstract

A grounding system suitable for urban rail transit is disclosed. The working grounding device is configured in that symmetrical working grounding points are arranged on the left side and the right side of a vehicle body, and each working grounding point is electrically connected with a switch, a carbon brush and a wheel set in sequence. The protective grounding device is configured in that symmetrical protective grounding points are arranged on the left side and the right side of a vehicle body, and each protective grounding point is electrically connected with a control switch, a power diode,a grounding carbon brush and a wheel set in sequence; and an automatic control system is used for regulating and controlling the currents of the two grounding devices, so that the currents on the twosteel rails are approximately equal. Power diodes are adopted for protection grounding, current is limited to only flow into the steel rails from a train body, damage of train rail backflow to train-mounted weak point equipment is avoided, the currents on the two steel rails are equal through an automatic control system, and the safety of a train is improved.

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 ...

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

Images