Estimator for monitoring online state of power cable by ultraviolet method

Abstract

The invention discloses an estimator for monitoring an online state of a power cable by an ultraviolet method. The estimator consists of a partial discharge ultraviolet detection unit, an insulating medium parameter measurement unit, a temperature detection unit, a central control processing unit, a GSM data communication unit and a power management circuit, wherein output ends of the partial discharge ultraviolet detection unit, the insulating medium parameter measurement unit and the temperature detection unit are connected with an input end of the central control processing unit respectively; the output end of the central control processing unit is connected with the input end of the GSM data communication unit through a CAN bus; and the output end of the power management circuit is connected with power ends of the partial discharge ultraviolet detection unit, the insulating medium parameter measurement unit, the temperature detection unit, the central control processing unit and the GSM data communication unit respectively. The estimator is used for the online detection of parameters such as temperature, partial discharge, medium characteristic variation, environment condition and the like of a buried cable, and has the advantages of reliable and flexible detection effect and low detection cost.

Description

technical field [0001] The invention relates to an on-line status monitoring device for power cables, in particular to an on-line status monitoring and evaluation instrument for power cables using an ultraviolet method. Background technique [0002] The status monitoring of power cables is related to the operation safety of the power system. Compared with overhead lines, underground power cables have incomparable advantages, but they also have the obvious problem of inconvenient maintenance. Therefore, the fault detection of underground power cables has become the focus of attention and research of domestic and foreign experts and scholars. At present, there are underground cable fault locators, ultrasonic flaw detectors and other products to measure the direction and depth of buried cables, open circuits, short circuits, and fault points. However, these methods are single, and cannot comprehensively detect cable operating parameters such as cable temperature, cable ampaci...

AI Technical Summary

Problems solved by technology

However, these methods are single, and cannot comprehensively detect cable operating parameters such as cable temperature, cable ampacity, partial discharge, dielectric aging, and surrounding environment, and cannot perform on-line monitoring and evaluation of power cables. They have been unable to adapt to modern power grid development and scientific prevention management. needs, but cannot meet the requirements of establishing an underground power cable safety early warning information system

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