Influence of Main Insulation Thermal Aging on Stator Temperature Field in Large Turbo-Generator

Abstract:

The eddy current loss of stator strands in the in-phase slot and out-phase slot was calculated by the finite element method (FEM). 3D static heat transfer equations and equivalent variation equations of large turbo-generator under the Cartesian coordinates system were given. The stator temperature field of large turbo-generator was calculated by using 3D FEM, and the influence of thermal conductivity reduced due to main insulation aging both in in-phase slot and out-phase slot on the stator was analyzed. The obtained conclusions will provide theoretical basis for fault prediction and fault diagnosis.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 7505-7510
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.7505
• Online since: January 2012
• Authors: Wei Li Li, Zhen Xing Wu, Fei Yang Huo
• Keywords: Eddy Current, Insulation Aging, Temperature Field, Turbo-Generator

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