基于Energetic模型的直流偏磁条件下电工钢片磁特性模拟及实验验证  

Simulation and Experimental Verification of Magnetic Characteristics of Electrical Steel Sheet Under DC Bias Based on Energetic Model

作　　者：赵志刚[1] 马习纹 姬俊安 ZHAO Zhigang;MA Xiwen;JI Jun’an(State Key Laboratory of Reliability and Intelligence of Electrical Equipment(Hebei University of Technology),Hongqiao District,Tianjin 300130,China;Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province(Hebei University of Technology),Hongqiao District,Tianjin 300130,China)

机构地区：[1]省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学),天津市红桥区300130 [2]河北省电磁场与电器可靠性重点实验室(河北工业大学),天津市红桥区300130

出　　处：《中国电机工程学报》2020年第14期4656-4665,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51677052)。

摘　　要：直流偏磁条件下,变压器励磁电流畸变,损耗显著增加,导致变压器局部过热甚至绝缘老化。为研究直流偏磁对铁磁材料磁滞和损耗特性的影响,该文首先在静态Energetic磁滞模型的基础上,考虑涡流损耗和异常损耗对磁滞回线的影响,建立动态Energetic模型,并利用优化算法和损耗分离理论分别提取无偏磁条件的静态Energetic磁滞模型参数和动态损耗系数。通过对比磁滞回线仿真结果与实测数据,验证了所建模型的准确性;其次,搭建磁性能测试系统,实验获取了不同偏磁工况下电工钢片的磁滞特性和损耗特性数据,并分析直流偏磁量对磁滞损耗、动态损耗(涡流损耗与异常损耗之和)的影响规律;最后,基于上述分析结果,提出一种对不同偏磁条件下铁磁材料的磁滞回线及磁损耗进行预测的新方法。对比预测结果与实验结果,发现二者吻合较好,验证了该文方法的正确性。Under the condition of DC bias, the transformer excitation current is distorted, and the loss is significantly increased, which leads to local overheating of the transformer and even insulation aging. In order to study the effect of DC bias on the hysteresis and loss characteristics of ferromagnetic materials, firstly based on the static Energetic model and considering the influence of eddy current loss and abnormal loss on the hysteresis loop, a dynamic Energetic model was established in this paper, and the optimization algorithm and loss separation theory were used to extract static Energetic model parameters and dynamic loss coefficient without bias conditions. The accuracy of the model was verified by comparing the simulation results and measured data of the hysteresis loop. Secondly, a magnetic performance test system was set up to obtain the hysteresis and loss characteristics of electrical steel sheets under different bias conditions, and the influence of DC bias on the hysteresis loss and dynamic loss was analyzed. Finally, based on the above analysis results, a new method for predicting the hysteresis loops and magnetic losses of ferromagnetic materials under different bias conditions was proposed. The prediction results were compared with the experimental results, and they were found to be in good agreement, which verifies the correctness of the proposed method.

关 键 词：直流偏磁 动态Energetic模型 爱泼斯坦方圈 磁损耗 磁滞回线 

分 类 号：TM936[电气工程—电力电子与电力传动]