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Modeling and Real-time Simulation of Internal Faults in Turbogenerators

机译:汽轮发电机内部故障的建模与实时仿真

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When an internal fault occurs in the lap-connected windings of turbogenerators, the symmetry between the parallel windings is broken, and different currents then flow because unsymmetrical magnetic linkage exists between the stator windings. The aim of this article is to present a real-time simulation model to investigate the internal fault currents in large turbogenerators with lap windings. This model is based on a modified winding function approach, where the machine inductances are calculated directly from the machine winding distribution. The calculation of the machine inductances are made easier by the use of machine electrical parameters instead of geometrical parameters. The simulation results have been obtained for different cases of internal faults. By using simulated internal fault data, a suitable numerical protection scheme for turbogenerators-can be developed.
机译:当涡轮发电机的搭接绕组中发生内部故障时,并联绕组之间的对称性将被破坏,并且由于定子绕组之间存在不对称的磁链,因此会流过不同的电流。本文的目的是提供一个实时仿真模型,以研究带有搭接绕组的大型涡轮发电机的内部故障电流。该模型基于修改后的绕组函数方法,其中电机电感直接从电机绕组分布中计算得出。通过使用电机电气参数而不是几何参数,可以简化电机电感的计算。针对不同内部故障情况获得了仿真结果。通过使用模拟的内部故障数据,可以为涡轮发电机开发合适的数字保护方案。

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