Modeling and Validation of Thermal-Fluid Field of Transformer Winding Based on a Product-Level Heating and Cooling Model
The temperature rise and hotspot of transformer winding is an important index to judge the reliability of transformer and is one of the key issues concerned by the transformer manufacturers and researchers. At present, there are many simulation studies on the temperature rise and hotspots of transformer windings, but they are often limited to the algorithm study or software application and lack of experimental validation, especially the tests on a product-level platform. To this end, our laboratory has built a product-level platform for testing the winding temperature rise and hotspot in Baobian Electric. The heating and cooling model of the transformer winding’s platform is mainly composed of the air core non-inductive coil, active-part insulation, heat-insulating tank, panel-type radiator, oil pump, fan, oil conduit and thermoelectric couple. Based on this model, the temperature rise and hotspot experiments under various operating conditions are carried out, and the experimental data are compared with the results of the ANSYS FLUENT. The simulation results show that the accuracy of the simulation results can be further improved by considering the influence of spacers, strips and other factors when modeling so as to better meet the engineering application requirements.
KeywordsThermal-fluid field Heating and cooling model Transformer winding Modeling and simulation
The authors wish to express gratitude to Prof. Yinhan Zhao for his design and guidance of model-based experiment. The authors wish to thank Zhenbin Du, director of the Institute of Power Transmission and Transformation Technology, for his review of the manuscript and for his many important suggestions. The authors would also like to thank Guisheng Han, Jie Li, Lanron Liu and Meilin Lu for their strong support for this work.
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