Monitoring drainage control method of stray current

Abstract

The invention discloses a monitoring drainage control method of stray current, which comprises the steps of collecting polarization voltage Up between structure steel and a reference electrode and orbit structure voltage Ugp between the structure steel and an orbit through a sensor, uploading the collected data to a monitoring device through a data adapter unit; calculating leaking stray current by adopting a quadratic function distribution curve method by the monitoring device according to the received data; calculating duty cycle of a square wave of a drainage device according to the size of the leaking stray current and then transmitting the information of controlling the duty cycle of the square wave to the drainage device to drain. According to the control method disclosed by the invention, the leaking stray current of an orbit system can be accurately calculated; the leakage condition of the stray current along the orbit can be monitored in real time by adopting a monitoring drainage control system of a topology structure and the drainage can be automatically finished. The problems of under-drainage and over-drainage caused by existing switch drainage and independent drainage of an intelligent drainage cabinet are overcome; and the stray current generated by the orbit in traffic operation can be bettered monitored and removed, and effective protection to a buried steel structure is supplied.

Description

technical field [0001] The invention relates to a stray current monitoring drainage control method, in particular to a subway stray current monitoring drainage control method. Background technique [0002] The power supply of urban subway and light rail systems usually adopts DC power supply, and uses the running rail of the train as the working current return line. When the working current flows back on the rail, the rail will form a potential difference to the ground, so it is very easy to generate leakage current from the rail to the ground, that is, stray current. Stray current will have a very large corrosion effect on the subway rails and various underground steel structures. In actual engineering, stray current is difficult to measure directly, and indirect measurement is generally used to reflect the leakage of stray current. The risk index of stray current corrosion of structural steel and metal equipment in subway systems is determined by the current density flow...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a stray current monitoring and drainage control method, which can accurately monitor the stray current leakage, and automatically take measures to eliminate the stray current, so as to solve the problem that the existing technology cannot truly and effectively reflect the stray current leakage, and also It is impossible to avoid the phenomenon of over-drainage and under-drainage, so that various buried steel structures cannot be effectively protected

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