Power cable multi-state comprehensive online monitoring system and method for calculating cable core temperature

Abstract

The invention provides a power cable multi-state comprehensive online monitoring system and a method for calculating cable core temperature. The system includes a terminal node, a center node and a data management platform, the terminal node includes a plurality of monitoring units, each monitoring unit includes a monitoring point, a sensor, a data acquisition module and a wireless transmitting module, an output end of the sensor is connected with an input end of the data acquisition module, an output end of the data acquisition module is connected with an input end of the wireless transmitting module, and the wireless transmitting module sends data information to the center node; and the center node includes a center node module and a GPRS transmitting module, the center node module is connected with the GPRS transmitting module, the GPRS transmitting module uses a GPRS network to upload data to the data management platform, and the data management platform analyzes the state in which a power cable is according to the received data information. The power cable multi-state comprehensive online monitoring system provided by the invention can timely and accurately discover insulation defects of the cable, and accurately calculate the power core temperature.

Description

technical field [0001] The invention relates to the technical field of electric equipment insulation monitoring, in particular to a multi-state integrated on-line monitoring system for electric cables and a calculation method for cable core temperature. Background technique [0002] With the development of urbanization and urban power grids, power cables are widely used. Through the investigation of the failure rate of power cables in major cities across the country, it is found that within 1 to 5 years of the initial operation of the cable and 5 to 25 years after being put into operation, the failure of power cable accessories (including branch joints, terminal joints and intermediate joints) rate is always the highest. [0003] A large number of power cables are distributed in various areas of the city. These cables have been running in high voltage and high current environments for a long time, and power cables are installed underground through cable trenches, which may ...

AI Technical Summary

Problems solved by technology

[0003] A large number of power cables are distributed in various areas of the city. These cables have been running in high voltage and high current environments for a long time, and power cables are installed underground through cable trenches, which may cause problems such as insulation aging and intermediate joint temperature rise. These problems are not easy to be detected during operation, and with long-term operation, accidents may occur if measures are not taken in time

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