Optical fiber grating-based internal temperature detection system for transformer

The utility model provides an optical fiber grating-based internal temperature detection system for a transformer, which comprises a light source, optical fiber grating sensors, a grating signal demodulating system, a signal processing and displaying instrument and a data analysis software, wherein the optical fiber grating sensors are arranged on various detecting points at a winding and a stay of the transformer as well as other positions in the transformer and are used for sensing and measuring parameters of temperature, stress, partial discharge of the transformer; the grating signal demodulating system receives measured data of the optical fiber grating sensors and accurately demodulates optical signals corresponding to the parameters of the temperature, the stress, the partial discharge and the like; the signal processing and displaying instrument performs correction processing such as temperature compensation and stress desensitization for the measured signals and displays the real-time data on an instrument panel; and the data analysis software performs programming software analysis for the processed data, so that an internal temperature field and temperature variation of the transformer, as well as internal temperature monitoring and life cycle evaluating of the transformer are obtained in real time. The detection system realizes real-time measurement of the multi-point temperature in the transformer through photoelectric sensors, thereby providing an excellent base for the economical operation of the transformer.