Cable line state on-line monitoring system

Abstract

The invention discloses a cable line state on-line monitoring system comprising a current transformer connected with a collection unit through a wire; the collection unit is used for sampling current signals of all lines in the switch cabinet in real time, collecting temperature data of cable joints and uploading the temperature data to the collection unit through a wireless network; acquiring temperature and humidity information in the switch cabinet, and acquiring switching value information in the switch cabinet; and the edge internet of things proxy terminal is used for monitoring bus voltage and current signals in real time, issuing a wave recording instruction to all collection units under the same bus according to triggered absolute time when a certain trigger condition is met, collecting wave recording data of all lines under the bus, and realizing synchronous measurement among equipment according to absolute time marks of the equipment. Through online comprehensive monitoring of the switch cabinet and the cable line, abnormal operation information of the line and the switch cabinet can be found in time, efficient and accurate operation and maintenance of the switch cabinet are achieved, and the development requirement of an urban power distribution network is met.

Description

technical field [0001] The invention relates to an on-line monitoring system for the state of a cable line, belonging to the technical field of on-line state monitoring of an intelligent distribution network. Background technique [0002] With the development of the intelligent distribution network, a large number of cable lines have been invested in the distribution network system. Due to the virtual connection and partial discharge of the cable lines at the connection of its cable joints, switch cabinets and other positions, in addition to the possibility of causing the cable trench to catch fire , The cable joints are heated, burned, short-circuit ground faults, etc., and may also cause personal electric shock and fire accidents. Therefore, it is necessary to carry out real-time online monitoring of the status of the cable line, so as to detect the abnormal operation of the line in time, realize the functions of real-time evaluation of the operation status of the distribu...

AI Technical Summary

Problems solved by technology

[0002] With the development of intelligent distribution network, a large number of cable lines have been invested in the distribution network system. Due to the problems of virtual connection and partial discharge in the connection of the cable joints and switch cabinets of the cable lines, in addition to causing fire in the cable trench , cable joint heating, burning, short circuit ground fault, etc., may also lead to personal electric shock and fire accidents

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