Comprehensive on-line intelligent monitoring system for high-voltage cable

Abstract

The invention provides a comprehensive on-line intelligent monitoring system for a high-voltage cable. The system comprises an on-site acquisition unit group, a far-end monitoring host and a system communication background. The on-site acquisition unit group comprises a partial discharge acquisition unit, a circulation acquisition unit, a vibration acquisition unit, an environment acquisition unit and a video acquisition unit; the partial discharge acquisition unit comprises a first ultraviolet light detection unit, a second ultrasonic detection unit, an edge data processing unit and a partial discharge online monitoring assembly; and the edge data processing unit acquires the ultraviolet light signal acquired by the first ultraviolet light monitoring unit and the ultrasonic signal acquired by the second ultrasonic detection unit to obtain a partial discharge identification result and obtain an intelligent monitoring result of the high-voltage cable in the current time interval. And if the partial discharge identification result satisfies a predetermined condition, activating the partial discharge on-line monitoring assembly. According to the invention, a cable full-cycle management and control strategy is established, and the accuracy of early warning of faults is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of cable safety, in particular to a comprehensive online intelligent monitoring system for high-voltage cables. Background technique [0002] With the rapid development of power systems, the application range of high-voltage cables in power systems has gradually expanded. Most of the cable lines are built underground, which beautifies the city and saves the land occupied by the transmission corridor. In the transformation of urban power grids, it is an inevitable trend for cable lines to replace traditional overhead lines. In the main areas of big cities such as Beijing and Shanghai, overhead lines have been basically replaced by high-voltage cable lines, and have become the first choice for power grids in urban core areas. According to statistics, Beijing has more than 8,000 kilometers of power supply lines and more than 18,000 kilometers of cables. The operation status of the cable is of great significa...

AI Technical Summary

Problems solved by technology

[0006] However, the inventors found that, on the one hand, the traditional cable monitoring system has little monitoring data information, such as only using smoke detection equipment, pyroion detection equipment, video equipment, etc., resulting in inaccurate early judgment and early warning of cable fires. The partial discharge, circulating current, load and other monitoring data of the cable body are not integrated with the cable service environment data, and it is impossible to provide comprehensive early warning of the origin of the cable fire

At the same time, the cable monitoring system does not link all the monitoring data with the control signals of the fire extinguishing device, so the degree of automation and intelligence is low

This leads to the fact that the alarm can only be issued after the fire occurs to a certain stage. At this time, the best time to deal with it has been missed, and a large number of fire warnings are inaccurate, causing irreparable losses to the power system or unnecessary loss of people, property and property. ; In addition, there are many defects in data transmission and energy consumption in the existing technical solutions, for example, multiple devices need to be operated at all times, and there is a huge energy consumption

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