Feed Catenary Fault Location System Based on Impulse Method

Abstract

The invention belongs to the field of maglev engineering traction power supply related equipment, and discloses a pulse method based feed catenary fault locating system. The system comprises an acquisition module, a storage module, a command generation module, a judgement module and a control unit, wherein in the acquisition module is used for acquiring instantaneous current between running rails from the feed catenary at set time; the storage module is pre-stored with a short-circuit current curve reflecting the distance relationship between a short-circuit fault point of the feed catenary and a traction substation, and the command generation module and the judgement module match with each other to judge whether multiple locomotives take current outside at the same time or not; the control unit compares sampled data from the acquisition module with corresponding current values on the short-circuit current curve of the storage module one by one, and combines the judgement results from the judgement module to judge whether short-circuit fault happens or not and realize short-circuit fault point locating. Through the system, feed catenary fault locating of the maglev traction power supply system can be realized in a convenient-to-control and high-precision mode.

Description

technical field [0001] The invention belongs to the field of equipment related to traction and power supply of maglev engineering, and more specifically relates to a fault location system for feed catenary based on pulse method. Background technique [0002] The speed of medium and low-speed maglev trains is generally 100km / h to 200km / h, which is suitable for urban public rail transit, including urban traffic, suburban traffic, city center to airport, and traffic between multiple cities. As one of the key technologies of maglev, a reliable and economical and reasonable power supply system is an important guarantee and prerequisite for the safe operation of maglev trains; and in order to supply power from the traction substation to the locomotives of maglev trains, a feeder contact must be provided between the two network. [0003] However, when a short-circuit fault occurs on the DC side, the feeder catenary will also be short-circuited to the running rail, and the short-ci...

AI Technical Summary

Problems solved by technology

[0003] However, when a short-circuit fault occurs on the DC side, the feeder catenary will also be short-circuited to the running rail, and the short-circuit current will show very different characteristics with the distance between the short-circuit fault point and the traction substation

Specifically, when a short-circuit fault occurs near the traction substation, it is relatively easy to determine the location of the fault due to the high rate of rise of the short-circuit current; and as the short-circuit fault point gets farther and farther away from the traction substation, The rise and change rate of the short-circuit current is small, and the current amplitude is also small. In this case, the current situation is easily confused with the state when multiple locomotives take current at the same time, which makes it difficult to distinguish when a short-circuit fault occurs at the remote end during actual operation. The situation of short circuit current and locomotive starting current, which leads to the delay of short circuit fault repair