Dynamic Modeling of Three-Phase Asymmetric Power Transformers With Magnetic Hysteresis: No-Load and Inrush Conditions
Dynamic Modeling of Three-Phase Asymmetric Power Transformers With Magnetic Hysteresis: No-Load and Inrush Conditions
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DOI：
10.1109/tec.2010.2065231
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发表时间：
2010-09
影响因子：
4.9
通讯作者：
P. Moses;M. Masoum;H. Toliyat
中科院分区：
文献类型：
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作者：
P. Moses;M. Masoum;H. Toliyat
本文提出了一种适用于稳态和瞬态运行条件的三相三柱变压器的新动态模型。除了极少数例外，现有模型过度简化了多腿磁芯拓扑中的磁相互作用，并采用单值非线性函数来建模磁芯非线性。不幸的是，这并不能为各种动态干扰（例如直流偏置、铁磁谐振和浪涌）提供足够的精度。为此，开发了一种基于磁路理论的新时域模型，以包含不对称三腿磁芯拓扑中的动态磁滞行为（大环和小环）。此外，还进行了一项新的分析，以研究磁滞对三相变压器空载和瞬态浪涌电流行为的影响。仿真结果已成功与测量结果进行比较，以验证所提出模型的准确性。
A new dynamic model of a three-phase three-leg transformer for steady-state and transient operating conditions is proposed in this paper. With very few exceptions, the existing models oversimplify the magnetic interactions in multileg core topologies and employ single-value nonlinear functions for modeling core nonlinearities. Unfortunately, this does not provide sufficient accuracy for a wide range of dynamic disturbances such as dc bias, ferroresonance, and inrush. For this purpose, a new time-domain model based on magnetic-circuit theory is developed to include dynamic-hysteresis behavior (major and minor loops) in asymmetric three-leg core topologies. Furthermore, a new analysis is performed to study the impacts of hysteresis on no-load and transient inrush current behavior in three-phase transformers. Simulation results have been successfully compared with measurements to verify the accuracy of the proposed model.