Research on stator winding open circuit faults of permanent magnet wind turbine

In view of the appearance of parallel stator winding open circuit fault in large capacity permanent magnet wind turbines, the negative sequent current is caused in stator windings, which may endanger the stability of the wind turbine. With the 2-D transient electromagnetic field, the negative sequence current with the rated condition and fault condition is calculated. Further more, the change rule of the negative sequence current with degree and position is studied, which provides a theoretical basis for fault diagnosis of stator windings of permanent magnet wind turbines.