Numerical Calculation of Multi-coupled Fields in Large Salient Synchronous Generator

The physical fields of synchronous generator are very complicated because of the coupling of electromagnetic field, fluid field and thermal field. In this paper, a large synchronous generator is taken for an example and the three types of fields are calculated. Firstly, the mathematical model and physical model of 2D electromagnetic field are determined by which the losses in each part of the generator are calculated. Secondly, the fluid kinetic differential equations in stator radial ventilation duct are built. After determining the solved region and boundary conditions, the 2D fluid field is computed and the different distributions of fluid field are compared and analyzed when the fluid has different entrance angles. Finally, the 3D stator temperature fields are solved under different inlet angles respectively. The results of the coupled fields are analyzed

[1]  Cheng Shu-kang.  Calculations of 3D Temperature Field in Stator for Large Hydrogenerator Based on 3D Isoparametric Element Method , 2000 .

[2]  Chang-Chou Hwang,et al.  Novel approach to the solution of temperature distribution in the stator of an induction motor , 1997 .

[3]  Li Wei,et al.  CALCULATION OF 3D STATOR TEMPERATURE FIELD OF LARGE AND MEDIUM SCALE ASYNCHRONOUS MOTOR ON THE BASIS OF THEORY OF FLUID SIMILARITY AND 3D FEM , 2000 .

[4]  J. Faiz,et al.  Coupled finite-element/boundary-element analysis of a reciprocating self-excited induction Generator in a harmonic domain , 2005, IEEE Transactions on Magnetics.

[5]  Changhong Liu,et al.  Analysis of 3D thermal field in the stator of large hydro-generator with evaporation-cooling system , 2003, IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03..

[6]  Ronnie Belmans,et al.  Computation algorithms for efficient coupled electromagnetic-thermal device simulation , 2002 .

[7]  S. K. Sen,et al.  Use of 3-dimensional finite elements for computation of temperature distribution in the stator of an induction motor , 1991 .

[8]  Li Weili,et al.  Numerical calculation of air gap magnetic field of a salient synchronous generator with the consideration of the effect of turn insulation , 2002, Proceedings. International Conference on Power System Technology.

[9]  D. Hyun,et al.  Analysis of synchronous reluctance motor using FEM coupled electromagnetic field of Preisach model & thermal field , 2002 .

[10]  L. Prandtl,et al.  The Mechanics of Viscous Fluids , 1935 .