Research on Winding Electrodynamic Force and Hot Spot Temperature Rise of Environmental Stereo Wound Core Transformer

In order to study the short-circuit electrodynamic force of the environmental stereo wound core transformer and the influence of the structure of the transformer core, high and low voltage winding and transformer shell on the temperature profile, the finite element field-circuit coupling model and the stereo fluid-temperature field simulation model are established by ANSYS simulation software. The short-circuit electrodynamic force of the transformer is calculated, and the influence of the structure of the transformer core, high and low voltage winding and transformer shell on the temperature profile of the transformer is analyzed. The results show that the amplitude force of the high-tension inner and outer windings shows an outward pull, while the axial force shows an inward pressure as a whole. The amplitude force of the low-voltage inner and outer windings shows an inward pressure, and the axial force is the same as that of the high-tension winding. The hot spot temperature of the transformer winding is 379.5K, which appears at the top of the outer low-voltage winding. The maximum temperature of the transformer core is 331.3K, which appears near the top of the core and the low-voltage winding.