直流偏磁下不同磁化曲线对变压器铁心损耗仿真的影响

发布时间：2018-11-14 13:24

【摘要】：直流偏磁下变压器铁心材料磁化特性采用不同的表述方式,将会产生不同的损耗仿真结果。本文基于爱泼斯坦方圈试验测量了30ZH120取向硅钢片的交流磁滞回环和交流偏磁磁滞回环,详细阐述并解释了交流磁化曲线、直流磁化曲线、平均磁化曲线、交流偏磁磁化曲线和交直流共同作用下磁化曲线的提取方法。从实验数据和理论分析的角度指出了交直流共同作用下磁化曲线与直流磁化曲线是同一条曲线。以两台干式变压器产品模型为例,设计并搭建了使变压器工作在直流偏磁条件的实验电路,测试并仿真计算了直流偏磁下电力变压器铁心的空载损耗。研究表明,计算分析直流偏磁电工设备时,可以用直流磁化曲线描述硅钢片材料的磁性能,为提高直流偏磁下变压器损耗仿真准确性提供了参考依据。
[Abstract]:The magnetization characteristics of transformer core materials under DC bias magnetic field are expressed in different ways, which will result in different loss simulation results. In this paper, AC hysteresis loop and AC bias magnetic hysteresis loop of 30ZH120 oriented silicon steel sheet are measured based on Epstein square loop test. The AC magnetization curve, DC magnetization curve and average magnetization curve are explained and explained in detail. The extraction method of AC bias magnetization curve and AC DC magnetization curve. From the point of view of experimental data and theoretical analysis, it is pointed out that the magnetization curve is the same as the DC magnetization curve under the interaction of AC and DC. Taking the product models of two dry transformers as an example, an experimental circuit is designed and built to make the transformers work under the condition of DC bias, and the no-load loss of the core of power transformers under DC bias is tested and simulated. The results show that DC magnetization curve can be used to describe the magnetic properties of silicon steel sheet material when calculating and analyzing DC bias electrotechnical equipment, which provides a reference for improving the accuracy of transformer loss simulation under DC bias magnetic field.
【作者单位】：沈阳工业大学电气工程学院;
【基金】：国家自然科学基金(51277122) 高等学校博士学科点专项科研基金(20122102130001) 辽宁省高等学校优秀人才支持计划(LJQ2013014) 辽宁省自然科学基金(2013020047)资助项目
【分类号】：TM41

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