Multi-physical coupling calculation of 1000MW supercritical turbine generator

Two-dimensional electromagnetic analysis model of supercritical turbine generator was established. After calculating the mathematical field, the eddy loss distribution and winding resistance enhanced coefficient of hollow and solid strands at different positions were obtained. Based on that, the temperature field and fluid field were calculated with coupling, from which temperature and fluid velocity in hollow stand and ventilation duct were gotten. Theoretical results approach together with experimental data derived from a 1000 MW supercritical turbine generator confirms the validity of the proposed method. Further more, temperature drop of insulation when the windings are cooled with water directly was analyzed.