考虑铁磁磁滞的变压器励磁涌流仿真分析

提出了一种考虑铁芯铁磁磁滞的变压器电磁暂态模型，并对变压器空载合闸时的励磁涌流现象进行了仿真研究。基于目前工程中应用较为广泛的Jiles-Atherton铁磁磁滞原理建立铁芯磁滞磁化曲线模块，通过设置适合的参数计算得到了与实际测量值较为吻合的 B-H曲线;通过分析单相三绕组变压器铁芯绕组结构及其电路模型，得到其电磁暂态计算模型;通过分析三相五柱式变压器磁路结构并利用对偶性原理，得到了其暂态计算分析模型。利用所建立的暂态计算模型对单相三绕组变压器的励磁涌流现象进行了仿真研究，仿真计算结果与实际试验测量结果的对比证明所提出的暂态计算模型的正确性和有效性;同时也对三相变压器组和三相五柱式变压器空载合闸时的励磁涌流进行了仿真计算，仿真结果证明所提出的暂态计算模型能够准确地分析变压器空载合闸时的励磁涌流现象。

A Simulation Study for Magnetizing Inrush Current of Transformers on Account of Ferromagnetic Hysteresis

This paper proposes an electromagnetic transient transformer model on account of ferromagnetic hysteresis of its core,which is used to simulate magnetizing inrush currents during no-load transformers switching on.The hysteresis loop of the transformer ferromagnetic core material is built based on the Jiles-Atherton phenomenological model.Comparison is made between the calculated(with suitable parameters) and measured B-H curve and found that good agreement is achieved.By analyzing the core and coil construc...