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Designing of End-winding Corona Protection of Generators by Help of Simulation

M. Wei[1], S. Grossman[1], J. Speck[1]
[1]Institute of Electrical Power Systems and High Voltage Engineering, Technische Universität Dresden, Dresden, Germany

The job of designing end-winding corona protection (ECP) system is one of the very important and complex phases for insulation configuration of high voltage rotating machines. This complexity stems on one hand from the highly nonlinear characteristics of the ECP material and on the other hand from the coupled multiphysics phenomena of the involved performance evaluation. Simulation based ECP design is considered as a time-saving approach and finite element method was adopted in order to understand and solve this problematic. In this work a simulation tool with COMSOL Multiphysics was developed to calculate the electrical-thermal behavior of the ECP system. Compare to experimental approach, design process is simplified and the results are presented intuitively. 2D and 3D modeling were applied.