Abstract：Design a temperature monitoring system based on fiber Bragg grating (FBG) to realize real-time monitoring of the hot spot temperature of transformer windings. Introduce the principle of fiber grating temperature measurement, and use the Maxwell and Fluent modules in Ansys to simulate the electromagnetic field-fluid field-temperature field of the transformer to obtain specific information of the hot spot, so that the position of the fiber grating sensor can be reasonably placed during actual measurement. Use the FBGA demodulation module to process the detected optical signal and complete the hardware construction. On the computer, the DLL function of the dynamic link library is called through the Labview software to complete the design of the host computer, which can realize the display of temperature and wavelength, and alarm when the temperature exceeds the threshold set by the user. Finally, the hardware part and the software part are connected to complete the construction of the entire temperature measurement platform.The calibration experiment and error analysis experiment are carried out, the fitting relationship between the central wavelength of FBG and temperature is obtained, and the feasibility of the temperature measurement platform is verified.
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2022, Vol. 43 
