A RFID-Based Temperature Measurement System for Smart Substation

The power load of the high-voltage electrical equipment in the smart grid, such as transformers, switchgear and loop cabinet, has increased dramatically. As the connection point between equipment and equipment is the weakest link in power transmission, and the essence problem of this weak link is the heat at the junction point. As the load increases, the joints heat up and form a vicious cycle: temperature rise, expansion, contraction, oxidation, increasing resistance, heating up again until the accident occurs. In this paper, the on-line temperature monitoring system based on RFID is designed. Through sensing technology, digital recognition technology, wireless communication technology, low power technology, anti-interference technology and automatic control technology, the real-time on-line monitoring of the temperature of the equipment is realized. The problem of SAW temperature measurement and the same frequency misreading and the interference of SAW temperature measurement are completely solved as well as the problem of changing and mistakenly warning. The utility model can be widely applied to temperature monitoring of various high and low voltage switchgear, box type changing and ring network cabinets, and can be installed on new equipment, or can be retrofit on old equipment.