中国电机工程学报2013，Vol.33Issue(3)：125-132,前插15,9.
基于FLUX2D的大型同步发电机在额定运行下定子绕组匝间短路故障特性研究
Fault Characteristic Study Based on FLUX 2D for Large Synchronous Generators With Stator Winding Inter-turn Short Circuits Under Rated Operating Conditions
叶志军 1游佰强 2J.Rosendahl 1S.T.Kulig1
作者信息
- 1. 多特蒙德工业大学电机拖动与机电一体化研究所,多特蒙德44227,德国
- 2. 厦门大学信息科学与技术学院,福建省厦门市361005
- 折叠
摘要
Abstract
This paper investigates the stator winding short circuit characteristics in synchronous generators under rated operating conditions by combing the single-winding analytical method and the finite element method (FEM), which is still the effective method to determine currents and torques under specific fault conditions. Some special measures have to be considered in case of the electromagnetic transient process under the condition of inner faults, e.g., the correct interconnection between sub-strands and the grid is of the particular importance for inner fault simulations. The previous results show that the traditional calculation method based on the equivalent networks fails in case of the inner asymmetry magnetic field. Based on the systematic investigation of a turbo generator with inter-turn short circuits, the results of this paper show the short circuit currents, phase currents, torques and the radial forces have strong correlations with the location and the turn number of faults. In some cases of inter-turn short circuits, the fault currents exceed that of the outer faults. Furthermore, strong radial forces acting on the magnet wheel might lead to the damages of the total shaft train.关键词
同步发电机/定子绕组/有限元法/匝间短路Key words
synchronous generator/ stator windings finite element method (FEM)/ inter-turn short circuits分类
信息技术与安全科学引用本文复制引用
叶志军,游佰强,J.Rosendahl,S.T.Kulig..基于FLUX2D的大型同步发电机在额定运行下定子绕组匝间短路故障特性研究[J].中国电机工程学报,2013,33(3):125-132,前插15,9.
