As the asymmetry a nd a shorted loop of stator winding are caused by a internal fault,the conventio nal transformation can not directly be used.

• 定子绕组发生故障后，绕组对称性遭到破坏，传统的变换方法难以应用；若按各支路列写方程，则方程维数过高，而且收敛也比较困难。