Research on 3D Temperature Field Reconstruction Method of Oil-Immersed Transformer Based on Multiquadric Function

Oil-immersed transformers often fail due to high internal temperature, which affects the safe and stable operation of the electric power system. At present, the direct measurement method affects the internal insulation structure and magnetic field distribution of the transformer under test. Infrared temperature measurement technology cannot obtain the temperature distribution inside the transformer. In this paper, ultrasonic temperature measurement technology was used to detect the temperature field of transformers, and a three-dimensional temperature field reconstruction system of an oil-immersed transformer was designed based on ultrasonic temperature measurement technology. It proposed a three-dimensional temperature field reconstruction algorithm of an oil-immersed transformer based on the Multiquadric function.