Impact of dynamic cross-saturation on accuracy of saturated synchronous machine models
Impact of dynamic cross-saturation on accuracy of saturated synchronous machine models
复制标题
动态交叉饱和对饱和同步电机模型精度的影响
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
V. Levi
中科院分区：
文献类型：
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作者：
E. Levi;V. Levi
同步电机中的交叉饱和效应一直是人们十分关注的问题。在机器模型中包含交叉饱和有两个后果。第一个，这里称为“稳态交叉饱和”，由稳态d-q轴磁化电感对两个轴上电流的依赖组成。第二个，这里称为“动态交叉饱和”，是系统矩阵中非零元素的存在，描述了d轴和q轴之间的交叉耦合。除了绕组磁链状态空间模型外，无论选择哪一组状态空间变量，所有的饱和机器模型都出现动态交叉饱和。本文的目的是比较不同模型在忽略动态交叉饱和时的性能。结果表明，动态交叉饱和对精度的影响取决于所选择的状态空间变量集。在大多数情况下，忽略动态交叉饱和会导致非常不准确的结果。然而，对于一类特殊的模型，忽略动态交叉饱和对精度几乎没有影响。因此，这些模型仅通过d-q轴磁化电感的连续变化就充分描述了完全饱和效应。
Cross-saturation effect in synchronous machines has been a subject of considerable attention. Inclusion of the cross-saturation in the machine model has two consequences. The first one, called here "steady-state cross-saturation", consists of dependence of the steady-state d-q axis magnetizing inductances on the currents in both axes. The second one, termed here "dynamic cross-saturation", is the existence of nonzero elements in the system matrix, that describe cross coupling between d- and q-axis. Dynamic cross-saturation appears in all the saturated machine models, regardless of the selected set of state-space variables, with the exception of the winding flux linkage state-space model. The aim of this paper is to compare behavior of various models when dynamic cross-saturation is neglected. It is shown that the impact of dynamic cross-saturation on accuracy depends on the selected set of state-space variables. In the majority of cases omission of dynamic cross-saturation leads to very inaccurate results. However, it is found that for one particular class of models, omission of dynamic cross-saturation has practically no impact on accuracy. These models therefore fully describe the complete saturation effect by means of only continuous variation of the d-q axis magnetizing inductances.