A method for discriminating the location of electric trains and high-resistance fault locations in the at section

Abstract

The invention discloses a position of an electric train in an AT section, a high-resistance fault and a discrimination method, and belongs to the technical field of electrified railway power supply. By synchronously measuring the voltage phasor, current phasor, terminal voltage phasor and current phasor of the contact line of the AT section and the negative feeder, write the circuit equation, and solve the position of the electric train and the high-resistance fault position x. The current taking of the voltage at both ends of the AT section of the traction network within the normal range of greater than 19kV is divided into two types: electric train (traction load) and high-resistance fault. If the voltage at both ends of the AT section of the traction network is within the normal range, and the current-taking position x calculated by the formula changes with time, then the current-taking position x is judged as the position of the electric train, and reported to the substation integrated self-healing ESC , if the current-taking position x does not change with time, and the period of time that does not change with time exceeds the train stop time, it is judged as a high-resistance fault, and its location is reported to the substation to issue an alarm or trip command. It is used for the location of electric trains used in electrified railways and the location of high-resistance faults.

Description

technical field [0001] The invention relates to the technical field of electric railway traction power supply. Background technique [0002] my country's railway construction has attracted worldwide attention and achieved remarkable results. As of 2017, my country's railway operating mileage has reached 127,000 km, of which the operating mileage of high-speed railways has increased to 25,000 km, accounting for two-thirds of the world and ranking first in the world. High-speed railways use electric traction without exception. With the increase of high-speed railway mileage, the safety and good operation of the traction power supply system must be highly valued. [0003] AT (Auto Transformer, autotransformer) traction network power supply mode has the advantages of longer power supply section and greater power supply capacity, and can better meet the requirements of high-speed railways with high traffic density, high operating speed and large power supply capacity , has beco...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for discriminating the position of the electric train and the location of the high-resistance fault in the AT section, which can effectively solve the problem of real-time monitoring of the operation of the electric train and the power supply status of the AT traction network, and effectively solve the problem of existing The technical problem that the relay protection cannot normally detect the high-resistance fault and act correctly

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