Influence of Aluminum Foil and External Conductor on the Temperature Distribution of RIP Condenser Converter Transformer Bushings

With the increase of capacity, it's imperative to research about the 3-D temperature distribution regularity of transformer converter bushings. However, the influence of aluminum foil plates and heat generation power of external conductor on the temperature distribution of bushings has usually been neglected. In this paper, using the computational fluid dynamics (CFD) and finite element method (FEM) analysis method, the 3-D temperature distribution of the converter transformer bushing will be simulated according to the actual operating environment by considering the effect of the aluminum foil plates and the heat generation of the external conductor. The research indicates that the aluminum foil plates have little influence to the temperature distribution of RIP bushings. The thickness of external conductor should be reduced as much as possible, and try to choose materials with larger resistivity to reduce alternating eddy current loss of the external conductor and improve the bushing temperature distribution.