Mine high-voltage cable state monitoring and fault diagnosis prewarning device

Abstract

The invention discloses a mine high-voltage cable state monitoring and fault diagnosis prewarning device. In the device, the primary windings of an input reactor unit and a voltage transformer unit are connected into a power grid; a reactor neutral point and the secondary winding of the voltage transformer unit are connected with an insulation resistance monitoring unit; a sensor unit is connected with a characteristic amount signal processing unit and a partial discharge signal acquisition unit by signal lines; the characteristic amount signal processing unit is connected with a characteristic amount signal acquisition and transmission unit by a signal line; the characteristic amount signal acquisition and transmission unit is connected with an FPGA system unit by an RS232 communication line; the partial discharge signal acquisition unit is connected with the FPGA system unit by a data line; the FPGA system unit is connected with an industrial personal computer by a CAN bus; the input of a power supply unit is connected with the secondary winding of the voltage transformer; a direct current voltage required by a circuit board is supplied by an external switching power supply; thesensor unit is arranged in a power distribution device; and a flame-proof enclosure encapsulates electrical parts of the overall device in the cavity thereof. The device adopts a modularized system structure, improves the stability and the reliability of power supply for mine and coal underground production, ensures safe operation of the mine and coal underground production, and provides reliableguarantee for the modernization of the mine and coal underground production.

Description

technical field [0001] The invention relates to a high-voltage cable state monitoring and fault diagnosis and early warning device, in particular to a high-voltage cable state monitoring and fault diagnosis and early warning device for underground coal mines. technical background [0002] With the continuous extension of the working face of large mines, the laying of high-voltage cables for mines is getting longer and longer, and the power supply network is becoming more and more complicated. Due to operating overvoltage, mechanical damage and water intrusion in the running cables, partial discharge, electric branches and water branches will appear under the long-term action of the electric field, causing insulation aging and deterioration, and in severe cases, grounding faults will occur. According to incomplete statistics, cable faults account for about 2 / 3 of power supply equipment accidents in coal mines, which is one of the main reasons for gas explosion accidents in co...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a mine-used high-voltage cable state monitoring and fault diagnosis and early warning device, which solves the problems of timely online monitoring of the operating state of high-voltage cables in underground coal mines and timely early warning of fault diagnosis. Multi-feature online monitoring, multi-feature information fusion, multi-feature information extraction, fault diagnosis and early warning, in order to further improve the stability and reliability of coal mine production and power supply, and ensure the safe operation of coal mine production

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