摘要
本文根据大型水轮发电机定转子铁心及其绕组实际结构并考虑铁心饱和的情况下 ,在整圆域中利用二维有限元法计算磁场分布及不平衡磁拉力。以一台 88极 2 40MW水轮发电机为例 ,对空载和负载下转子偏心以及转子半数励磁绕组短路等引起的不平衡磁拉力进行了计算 。
Based on practical structures of the windings and core of large hydrogenerator,this paper presented a numerical method to calculate the magnetic field distribution and unbalance magnetic pull(UMP) by the method of two dimension finite element in the whole calculating region taking into account the saturation.As a case study on a 240MW hydrogenerator of 88 poles,the UMP caused by eccentric rotor or a half of exciting windings fault for different load are computed,and then analysis of influences of the eccentricity and exciting current on the UMP has been undertaken.
出处
《大电机技术》
北大核心
2002年第2期26-29,共4页
Large Electric Machine and Hydraulic Turbine
