Calculation and Analysis of Stray Loss of Transformer Based on Impedance Boundary Method

DOI：

 作者 单位 E-mail 赵志刚 河北工业大学省部共建电工装备可靠性与智能化国家重点实验室 578685345@qq.com 郭莹 河北工业大学省部共建电工装备可靠性与智能化国家重点实验室 2427519546@qq.com 魏鹏 河北工业大学省部共建电工装备可靠性与智能化国家重点实验室 刘佳 河北工业大学省部共建电工装备可靠性与智能化国家重点实验室 尹赛宁 河北工业大学省部共建电工装备可靠性与智能化国家重点实验室 杨凯 河北工业大学省部共建电工装备可靠性与智能化国家重点实验室

为研究变压器结构件中的杂散损耗问题,基于Problem 21 基准族中的P21-B模型进行了详细实验研究和仿真分析。本文采用测量与仿真结合法对不同激励电流导磁钢板中的杂散损耗进行测量分析,并且针对现有测量方法的不足,引入温度系数因子对其修正,得到了更为准确的杂散损耗测量结果,同时,借助工程电磁场数值计算软件Magnet,分别采用传统有限元法和有限元与阻抗边界结合法对该模型进行仿真计算。通过对比分析,发现相较于传统有限元法,有限元与阻抗边界结合法在得到较为准确的损耗结果的同时,还能减少计算成本,节省计算资源,更适合工程应用,所得结论和结果有助于通过优化设计提高变压器的性能指标。

In order to study the stray loss of transformer, a detailed experimental research and simulation analysis were carried out based on the P21-B model of Problem 21 benchmark family. A method of combining measurement with simulation was used to measure stray-field loss in magnetic plate under different current excitations in this paper. According to the deficiency of the existing measurement method, the temperature coefficient is introduced to the correction, and the more accurate loss results of stray loss measurement are obtained. The traditional finite element method and a method of finite element combined with impedance boundary are used to simulate the model. Through comparative analysis, it is found that the method of finite element combined with impedance boundary can reduce the calculation cost, reduce the computational cost, save the computational resources, and be more suitable for the engineering application. The conclusions and results are helpful to improve the performance index of the transformer through the optimization design.
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