Numerical calculation of transient eddy current fields and electromagnetic forces acting on end winding of large turbogenerators
 
WU Yong-xia1， ZHANG Jia1， LIANG Xu-biao2， NI Guang-zheng1，
 HUANG Lei2， XIAN Zhe-long2， YANG Shi-you1
（1． College of Electrical Engineering， Zhejiang University， Hangzhou 310027， China；
2． Shanghai Turbo-generator Co．， Ltd.， Shanghai 200240， China）

Abstract： To solve the force response of end windings of large turbo-generators，a circuit model and method based on full variable methods for transient performance simulations were established， a three dimensional finite element model and method for transient eddy current fields and electromagnetic forces acting on the end windings，of large turbo-generators，were proposed. Numerical results on a prototype large generator using the proposed model and method based on ANSYS commercial software were reported． The experiments results provide guidelines for engineering applications of large turbo-generators.
Key words： turbo-generator；eddy current field in the end region；electromagnetic force；finite element method