Design of Cable Temperature Monitoring System Based on RFID

For the stable operation of the power grid, temperature is one of the important criteria for considering its working performance. Moreover, accidents often occur in the joints of transmission lines, cables, busbars and other equipment. These parts are in a high-voltage working environment for a long time. The joint resistance is large, and the degree of heating will be more serious than other operating parts of the power grid, which will bring huge impact and economic losses to residents ‘ lives and normal work of the factory. With the continuous improvement of the construction and automation level of the new intelligent power network, the traditional manual temperature measurement operation has not adapted to the development and construction of the new power network. Therefore, it is necessary to introduce more advanced and reliable technology to realize automatic monitoring, which also plays an important role in the development of the smart grid. Considering that most of the actual power grid cable temperature measurement points are laid with active sensors, higher requirements are put forward for the insulation performance of the equipment, and the cable transmission temperature measurement method cannot cope with the more complex, dense and narrow working environment. In order to deal with the above problems, this paper proposes a design of cable temperature monitoring system based on RFID technology, which can realize the transmission and reception of wireless radio frequency signals. The overall design is to attach the temperature sensor tag to the cable joint and the key temperature measurement point. The temperature data measured by the tag in real time is transmitted back to the reader system through wireless transmission. This paper focuses on the introduction of readers and electronic tags, and explores the feasibility and working stability of this technology in cable temperature measurement through experimental methods.