Research of 3D Temperature Field of Hydro-generator with Aging Insulation

Mathematic model and equivalent variation equation of temperature Held is inferred. Base on the construction symmetry of ventilating system in hydro-generator, the model of analyzing stator temperature field is determined as the range of half tooth, half slot and half axial height. The hypotheses and corresponding border conditions are provided for simplification. In addition, heat conductive coefficients of iron core and stator winding considering the insulation layer and heat dissipation coefficients of each surface are confirmed. Using the finite element method software ANSYS, the stator temperature field of the hydroelectric generator is analyzed and calculated, the corresponding temperature field pictures and the highest temperature points are given considering the aging insulation.