State monitoring method and system for power cable terminal equipment based on infrared thermogram

Abstract

The invention discloses a state monitoring method and system for power cable terminal equipment based on an infrared thermogram. The method comprises the steps of segmenting a foreground region and a background region of target power cable terminal equipment for a to-be-processed infrared thermogram i; calculating a temperature average value Ta of the background region, dividing the foreground region into foreground sub-regions, and calculating a temperature average value TN in the foreground sub-regions; and judging whether the target power cable terminal equipment has a fault or not according to the temperature difference between the temperature average value TN in the foreground sub-region of any m-th row and n-th column and the temperature average value Ta in the background region. Infrared temperature measurement is an effective means for discovering the overheating defect of the cable terminal, various cable terminal defects are analyzed through background temperature differences, the monitoring efficiency can be effectively improved, the working temperature state of the target power cable terminal equipment can be accurately and timely judged, and method has the advantages of high detection accuracy, capability of realizing remote detection, safety and reliability.

Description

Technical field [0001] The present invention relates to a state monitoring technique of power grid transmission electrical devices, and more particularly to a state monitoring method and system of a power cable terminal device based on an infrared thermogram. Background technique [0002] The cable line has the advantages of high supply reliability, small area, beautify the city, and the power cable line has been more and more widely used in Hunan Power Grid; rubber-plastic cross-linking power cable (referred to as XLPE cable) due to its excellent electrical performance. Features such as heat resistance and mechanical properties, are widely used in the cable line, and the usage is increasing. The cable attachment production is completed by ordinary construction, and the installation process is not proficient. The cable supervision level is low, and some cable accessories are defective. For example, the 35 kV cable is in a blind spot, the health state is basically out of control, ...

AI Technical Summary

Problems solved by technology

[0015] The technical problem to be solved by the present invention: Aiming at the above-mentioned problems of the prior art, a method and system for monitoring the state of power cable terminal equipment based on an infrared heat map are provided. In the present invention, infrared temperature measurement is an effective means for finding overheating defects of cable terminals , using the background temperature difference to analyze various types of cable terminal defects can effectively improve the monitoring efficiency, and can provide accurate and timely judgment on the working temperature state of the target power cable terminal equipment. It has high detection accuracy, can realize long-distance detection, and is safe and reliable. The advantages

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