System and method for monitoring ring main unit cable joint temperature

Abstract

The invention discloses a system and method for monitoring the ring main unit cable joint temperature. The system comprises a ring main unit which comprises a cable chamber, a switch chamber, a secondary wiring chamber, a PT cabinet chamber, a network distributing automation chamber, a ring main unit power distribution terminal, a temperature monitoring terminal and a temperature sensor. In the temperature monitoring process, the environment temperature inside the ring main unit and the temperature of a cable joint inside the ring main unit are respectively measured in real time and are transmitted to a digital signal processor inside the temperature monitoring terminal, the actual temperature rising rate of the cable joint is obtained by carrying out compensation and verification on data, and the actual temperature rising rate is compared with the pre-set actual temperature rising rate threshold value of the cable joint. When the actual temperature rising rate of the cable joint exceeds the threshold value, a digital signal controller produces an alerting signal and enables an alarming module to be started to give an alarm, the data and the state are sent to a long-distance master station, workers of the long-distance master station can respond to fire and other dangerous incidents inside the main ring unit fast, and losses are reduced.

Description

technical field [0001] The invention relates to a monitoring system and method, in particular to a cable joint temperature monitoring system and method. Background technique [0002] With the continuous and rapid development of my country's social economy and the continuous improvement of people's living standards, power users have put forward higher requirements for power supply reliability, power quality and power supply security. Nowadays, the smart distribution network is vigorously promoted in China and is developing rapidly. As the main power equipment of the smart distribution network, the ring main unit can greatly improve the power supply reliability and economy of the distribution network, reduce labor intensity, improve management level and service quality, Promote the development of smart distribution network. Power cables have the advantages of durability, less land occupation, and can be laid on various occasions, and are widely used in power transmission and ...

AI Technical Summary

Problems solved by technology

The actual situation is that the cable joint is likely to have a grounding or short circuit fault caused by insulation breakdown

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