Real-time monitoring system for mine high voltage cables based on LPWAN

Abstract

The invention belongs to the technical field of cable monitoring, and particularly relates to a real-time monitoring system for mine high voltage cables based on LPWAN (Low Power Wide Area Network), the system comprises a temperature sensor, a signal amplifier, an AC / DC converter, a microcontroller, a data transmission terminal, and a monitoring terminal; the temperature sensor is connected withthe signal amplifier, which is connected with the AC / DC converter; the AC / DC converter is connected with the microcontroller, which is connected with the data transmission terminal. According tothe real-time monitoring system for mine high voltage cables based on the LPWAN, state of cables during normal operation can be monitored, so that monitored information is more real; financial loss due to power failure detection is effectively reduced; on-line monitoring of cable fault is realized actually, an insulation layer of the cable does not need to be stripped thereby reducing damage to the insulation layer of the cable, online monitoring and positioning on cables inside underground coal mine are realized, and accurate position and maintenance of maintenance personnel are greatly facilitated and promoted.

Description

technical field [0001] The invention belongs to the technical field of cable monitoring, and in particular relates to a mine high-voltage cable real-time monitoring system based on LPWAN. Background technique [0002] With the continuous development of my country's economy and the continuous expansion of urban construction, the power load is also increasing. At present, the proportion of power cables used in my country's power transmission and distribution systems continues to increase. XLPE cables have good insulation properties. Good thermal performance and mechanical performance, high reliability of power supply, etc., have been developed rapidly since its appearance in the 1960s, and have been applied to transmission lines and distribution networks of various voltage levels in power systems, and are constantly being applied to With the development of high-voltage and ultra-high voltage fields, the research on the online monitoring technology of power cable insulation in my...

AI Technical Summary

Problems solved by technology

[0003] 1. At present, the method of regular power failure preventive test is widely used in industrial production or power system. This method belongs to off-line detection and is very effective for cables that are about to leave the factory and cables before they are put into operation, and this method requires power failure. It is impossible to detect the cables in operation. With the increase of electricity consumption in our country year by year, this kind of regular blackout preventive test will lead to the interruption of power supply, which will not only cause a lot of economic losses, but also cause the cables to be in normal operation and power failure. The insulation state is different, and the voltage applied to the cable insulation during the test is often higher than the voltage during the normal operation of the cable.

[0004] 2, and this method needs to detect the entire cable line, but can not carry out targeted tests according to the specific insulation conditions such as the model of the power cable, the use time, etc., so that the cables that are originally in good insulation condition will be damaged after repeated tests. The insulation is aging or even damaged. This off-line detection method can no longer meet the actual needs of power production and people's lives.

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