Winding Temperature Rise Field Synergy Analysis of Nano-two-phase Magnetic Fluid Transformer

Abstract

Due to the high thermal conductivity of nanometer two-phase magnetic fluid, the transmission and overload operation capacity of transformer products can be greatly improved. Heat transfer characteristics and application of nanometer two-phase magnetic fluid with high stability in alternating magnetic field is an interdisciplinary subject involving electromagnetism, fluid mechanics, heat transfer and nanotechnology. However, scholars at home and abroad are still in the experimental stage, and it is difficult to produce research techniques for single-phase, low-power samples. Therefore, this paper takes a 50MVA, 110kV transformer as an example to design a variety of winding cooling structures. The mechanism of improving the heat dissipation performance of the system is studied by using the method of multi-field cooperative analysis. The temperature rise distribution before and after the application of nanometer two-phase magnetic fluid in winding cooling medium is numerically calculated and analyzed. The design theory of the new cooling structure is established.