异步化高压发电机失磁故障分析

针对以新型电缆绕组构成的异步化高压发电机的失磁过程进行研究,首先建立该电机场路耦合模型,利用耦合模型分析异步化高压发电机在不同转差率下转子发生对称短路失磁和不对称短路失磁故障的磁场进行分析,探索当转子绕组发生不同类型的短路故障时,定子铁心和转子铁心的磁通密度变化规律,为电机和系统故障分析提供数据基础.然后分析了异步化高...

Analysis of excitation loss fault of cable winding asynchronous high-voltage generator

The cable winding asynchronous high voltage generator loss process was studied.The field-circuit new coupling model was established,by using the model analysis of asynchronous high voltage generator symmetrical short circuit in rotor under different slip excitation-loss and asymmetric short-circuit excitation-loss fault magnetic field analysis.When rotor winding short-circuit fault occurs,the magnetic flux density of the stator core and rotor core change rule were explored,for failure analysis of generator and system to improve the data base.Then the variation rule and harmonic analysis of the stator three-phase current before and after the stator loss at different slip of the motor were analyzed,and the variation rule of the stator side electric quantity after the stator loss fault of the motor was obtained,which provides basic data for setting the relay protection of the motor.