Fault type judgment method and device for full-parallel AT power supply contact network

Abstract

The invention discloses a fault type judgment method and device for a full-parallel AT power supply contact network, and the method and device are applied to a system comprising a traction station, anAT station and a section station. The method comprises the following steps: obtaining the direction of a power frequency current when the full-parallel AT power supply contact network breaks down; wherein the power frequency current comprises feeder current of the traction station, feeder current of the AT station and feeder current of the subarea station, and the feeder current of the AT stationand the feeder current of the subarea station are connected to a T line side and an F line side respectively; and determining the fault type of the full-parallel AT power supply contact network according to the direction of the power frequency current. By comparing the direction of the power frequency current, the fault type under the full parallel AT power supply mode can be quickly judged, thefeasibility is high, the method is easy to implement in engineering practice, the result is visual, and the judgment result is easy to verify.

Description

technical field [0001] The invention relates to the technical field of catenaries, in particular to a method and device for judging fault types of fully parallel AT power supply catenary. Background technique [0002] Currently, electric railway power supply methods include direct power supply, BT power supply and AT power supply. Among them, the full-parallel AT (Auto Transformer, autotransformer) power supply mode is widely used in high-speed railways due to its characteristics of large power supply, long power supply section, adaptability to high speed and high reliability. Since the catenary is erected above the rails in the open air, it is exposed to different environments, and when the train is running, the pantograph and the catenary slide and rub, which can easily cause the catenary components to loosen or even fall off, resulting in catenary failures that are prone to occur. According to statistics, 60%-90% of catenary faults are transient faults, and the rest are ...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a fault type judgment method and device for fully parallel AT power supply catenary to solve the defects that the prior art cannot judge the fault type quickly and intuitively, and it is difficult to verify the accuracy of the judgment result

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