Intelligent temperature monitoring system of crosslinked polyethylene XLPE power cable

Abstract

The invention discloses an intelligent temperature monitoring system of a crosslinked polyethylene XLPE power cable and relates to the technical field of power cable monitoring. The system comprises a temperature sensor, a real-time temperature collector substation, a double-ring optical fiber self-recovery ring network and a working station computer; the working station computer is connected with the real-time temperature collector substation through the double-ring optical fiber self-recovery ring network, and the real-time temperature collector substation is connected with the temperature sensor through an interface circuit; the interface circuit refers to connecting the real-time temperature collector substation with the temperature sensor through a photoelectric coupler; the real-time temperature collector substation mainly comprises a central processing unit CPU, a memory, a display, a power supply, a clock unit and a self output control circuit; and an I / O interface is respectively connected with the interface circuit and an optical transmitter and receiver in the double-ring optical fiber self-recovery ring network. The intelligent temperature monitoring system disclosed by the invention has the advantages of simple structure, high reliability, strong expandability and easy installation and maintenance, and the system can find the insulation defects of the power cable, prevent the accidents and guarantee the safe operation of the cable.

Description

technical field [0001] The invention relates to the technical field of power cable monitoring, in particular to a cross-linked polyethylene XLPE power cable temperature intelligent monitoring system. Background technique [0002] XLPE power cables have been more and more widely used due to their advantages of no oil, less auxiliary equipment, simple installation, laying and operation and maintenance. As a simple method of monitoring the cable insulation operation status, cable temperature monitoring is conducive to timely detection of insulation defects of XLPE power cables, preventing accidents, and ensuring safe operation of cables. [0003] In the practice of XLPE power cable faults, its connector is the part where insulation faults often occur. Statistics at home and abroad show that cable head faults account for a relatively high proportion of cable body faults, which is also the starting point for the inventor to study the on-line insulation detection technology for X...

AI Technical Summary

Problems solved by technology

[0005] The current technology and method for on-line inspection of the insulation of XLPE power cable connectors can only reflect the insulation state from a certain characteristic surface. Due to the incompleteness and locality of the amount of reflected information, the deviation of the detection results is relatively large, and the detection effectiveness cannot meet the requirements. range, resulting in aging and deterioration of the insulation of XLPE power cable connectors during operation

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