Apparatus and method for implementation of orbit traffic direct current feed protection

Abstract

The invention relates to a device realizing the track-traffic direct-current feeding protection, the invention is characterized in that the device consists of an embedding-typed system, a switch controlling module, an A / D conversion module, an I / V conversion module and a collection input port, wherein, the embedding-typed system is respectively connected with the switch controlling module and the A / D conversion module, and the A / D conversion module is connected with the collection input port through the I / V conversion module. The device performs the detection and the judgment on the independent protection of the over-current instant protection, the over-current time-delay protection, the thermal inverse-time-lag protection, the near short-circuit protection and the far short-circuit protection, and can record the waveform data 300 ms before and 200 ms after the action while triggering the protection, thereby rapidly and correctly removing the malfunctions when the short circuit and the overloading are happened on the train contact line of a direct-current pulling network-circuit feeding system and preventing the mistake tripping operation of the protection device, which is caused by the variation of electric parameters while the train is in normal operation through the setting adjustment.

Description

technical field [0001] The present invention relates to a device and method for realizing rail traffic DC feed protection, in particular to a protection method dedicated to rail traffic DC traction feed system, which can realize various short circuits caused by overhead catenary and rail short circuit The utility model relates to a device for removing faults and eliminating catenary thermal overload faults, which is suitable for the protection of urban subways, light rails, intercity express rails and other DC feeder systems, and belongs to the technical field of DC feeder protection. Background technique [0002] The 21st century will be the era of China's urban rail transit. With the continuous development of the national economy, it will be accompanied by greater urbanization, which will make urban traffic increasingly tense and even become a more urgent task. Improper and inefficient traffic The system will inhibit and hinder the development of society and economy, and u...

AI Technical Summary

Problems solved by technology

[0004] 1. DCP106 of German ADTRANZ company, DCP106 is a combination of control and protection, suitable for complete sets of power distribution switchgear, its over-current instantaneous protection, over-current delay protection, thermal inverse time-limit over-current protection are relatively complete, but Its di / dt short-circuit protection function is not perfect;

[0005] 2. The BEM of Russian ATI company can only meet the general protection function, the real-time performance is poor, and it cannot meet the functional requirements of the traction system for di / dt near-far short-circuit protection, and there is no thermal inverse time-limit over-current protection;

[0006] 3. The DPU96, 3UB61, and DPU96 of German Siemens Company have no definite time limit overcurrent protection, and their di / dt near-far short-circuit protection function is not flexible and perfect; 3UB61 only has di / dt near-far short-circuit protection, and the used It is an analog protection method, which has ambiguity and uncertainty in the protection boundary, and is prone to refusal and misoperation;

[0007] 4. MPR of American PPECO company, MPR does not have di / dt short-circuit protection in the near area

[0008] However, there are still no domestic enterprises and manufacturers that design and produce such devices by themselves, and the required devices are completely dependent on imports.

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