Value hall fittings play an important role in electrical connection and mechanical fixing. Fittings usually work under large current, so it is necessary to pay attention to its temperature rise. Fittings' shape, material and the environment will affect its temperature rise. In order to study the temperature rise characteristics of fittings, high-current temperature rise experiment were carried out on fittings of different types and materials at different altitudes. In addition, convective heat transfer coefficients between fittings and surrounding environment at different altitudes are derived. The finite element calculation model of fittings is established, and the temperature rise of fittings is simulated by COMSOL Multiphysics. The steady temperature field distribution of fittings at different altitudes is obtained, and the results are compared with the experimental results, which verified the correctness of the theoretical analysis and simulation settings. Finally, the temperature rise of fittings at different altitudes is predicted. This paper can provide reference for material selection and numerical simulation of valve hall fittings in converter stations at different altitudes.
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