Intelligent fault judging device for self-closed through line of railway distribution network

Abstract

The invention discloses an intelligent fault judging device for a self-closed through line of a railway distribution network. Acquired parameters after passing through an over-current protection module are transmitted to an over-current fault judging module and a quick-break fault judging module through a current sensor and a voltage sensor; the over-current fault judging module and the quick-break fault judging module respectively transmit the judgment results to a microprocessor; the microprocessor judges fault types and fault phases; a first output port transmits the processed fault data to a fault display control module and respectively gives out two different alarm prompts according to a transient fault or a permanent fault; a second output port transmits a power signal to a power failure detection module, and sends alarm information, stops the microprocessor to work and prevents error operation when the voltage of a monitoring power supply is smaller than a normal working voltage; a third output port transmits a working state signal to a diagnostic module and detects the working states of the fault judging modules; and a fourth fault judging module is connected with a radio-frequency transmission module. Through the device, an over-current fault and a quick-break fault of the line are judged in real time without manually patrolling the line blindly or switching a remote switch on.

Description

technical field [0001] The invention relates to an intelligent fault judging device for a self-closing through line of a railway distribution network. Background technique [0002] In recent years, with the large-scale speed increase of railways and the construction of high-speed railways, the requirements for the reliability of power grid power supply are getting higher and higher. my country's railway distribution network generally adopts self-closing and through lines as backup for each other to supply power for railway signal power, and the voltage level is mainly 10kV. In order to ensure the safety of railway transportation, there are high requirements for the reliability of the self-closing through line and the rapid recovery of faults. If the power supply is interrupted, it will lead to confusion of the self-closing signal and affect the normal transportation of the railway. [0003] The existing railway distribution network mostly adopts a small current grounding sy...

AI Technical Summary

Problems solved by technology

The non-electric telecontrol section is pulled by people, which is time-consuming and laborious; although the telecontrol section can be pulled and closed by telecontrol, it is still judged by section-by-section trial delivery, which takes a certain amount of time. The power equipment of the system is impacted by high fault current for many times, which is easy to damage the equipment. For example, the high current impact can reduce the service life of the voltage regulator, and cause the voltage regulator to burn out in severe cases; the second is the unknown cause caused by soft fault or transient There is no way to search for tripping. At present, it is only possible to search for a needle in a haystack by manpower within the scope of a power supply arm (40-70KM), and it is often difficult to find the fault point, and the hidden danger is difficult to eliminate; The number of switch settings is restricted by factors such as construction, operation and maintenance costs, and the number of settings is limited

This has caused problems such as long power outage search time, high labor intensity and low efficiency when it is necessary to check the concealed fault by climbing the pole.

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