Research on 3D Temperature Field and Thermal-stress Field Numerical Simulation of Dry-type Transformer Curing Process

摘要

Finite element analysis(FEA) simulation of temperature and stress field was applied in dry-type transformer casting, curing, and cooling process in this paper. Considering to the material's performance changing along with temperature, the paper adopted nonlinear analysis. A 3D FEA model of the dry-type transformer winding transient temperature field and thermal-stress field was theoretically built, and a mathematical model of the initial condition, boundary condition, and latent heat disposal was built as well, then A FEA analysis was finished for the stress frame 3D temperature field and thermal-stress field of the typical winding. The result indicated that the numerical simulation can basically reflect the dynamic changing of the temperature and stress field in the casting, curing and cooling process, and it nicely tallied with the actual measurement.