Temperature Monitoring System of Electric Apparatus Based on Optical Fiber Fluorescence

Electric energy has become an important energy source in today´s society. But there has been the lack of safe, reliable and effective real-time fire monitoring solutions for the high voltage switchgear, transformers and other critical electrical facilities in the power plants and the transformer substations. Therefore, the optical fiber fluorescence temperature sensor has been developed, which is characterized by many advantages such as anti electromagnetic interference, small volume, high voltage resistance and corrosion resistance. In this paper, the optical fluorescence sensor working principle and system structure are described, and technical targets are given by experimentation. The operating temperature range of fiber thermal probe is-40°C~ 200°C, and the temperature resolution can reach 0.13°C. A low-cost, safe and reliable detection solution is provided for the high-voltage electrical equipment fire monitoring.