电工技术学报  2020, Vol. 35 Issue (21): 4483-4491    DOI: 10.19595/j.cnki.1000-6753.tces.191227
电机与电器 |
基于磁-热-流耦合模型的变压器损耗计算和热点预测
李永建1,2, 闫鑫笑1,2, 张长庚1,2, 陈怡帆1,2, 盈文亮3
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 300130;
2.电磁场与电器可靠性省部共建重点实验室(河北工业大学) 天津 300130;
3.天津市特变电工变压器有限公司 天津 300450
Numerical Prediction of Losses and Local Overheating in Transformer Windings Based on Magnetic-Thermal-Fluid Model
Li Yongjian1,2, Yan Xinxiao1,2, Zhang Changgeng1,2, Chen Yifan1,2, Ying Wenliang3
1. Hebei Province Key Laboratory of EFEAR Hebei University of Technology Tianjin 300130 China;
2. State Key Laboratory of EERI Hebei University of Technology Tianjin 300130 China;
3. TBEA Tianjin Transformers Co. Ltd Tianjin 300450 China
全文: PDF (4598 KB)   HTML
输出: BibTeX | EndNote (RIS)      
摘要 基于有限元法对一台2 500kV·A干式变压器进行额定负载条件下的三维瞬态电磁场模拟仿真,计算中考虑了漏磁场对箔式绕组和结构件涡流分布的影响。将电磁损耗计算结果按照网格逐单元耦合至温度场,并以此为热源建立磁-热-流多物理场映射关系,考虑温度对材料损耗特性的影响,精确模拟变压器对流换热过程并实现变压器结构件温升计算和绕组热点预测。开展变压器温升试验,结果表明模型预测值与试验值误差控制在± 6%,温升分布规律与实际吻合得较好。该文采用的多物理场双向耦合分析方法克服了传统磁路法损耗计算不准确的问题,在变压器产品研发初期可提供损耗预测方法和计算数据,显著提高相关电工装备的运行效率。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
李永建
闫鑫笑
张长庚
陈怡帆
盈文亮
关键词 箔式绕组涡流损耗磁-热-流耦合温升计算    
Abstract:Based on finite element method, the 3-D transient electromagnetic field simulation of a 2500kV•A dry-type transformer under rated load condition is carried out. The effect of the leakage flux on the eddy current distribution in foil windings and structures is considered in the calculation. The magneto-thermal-fluid coupling model was established and the loss density on each mesh element was mapped into the 3-D thermal field as heat sources. Considering the influence of temperature on material loss characteristics, the convective heat transfer process is accurately simulated, and the calculation of transformer temperature rise and the prediction of winding hot spots are realized. The test of transformer temperature rise indicated that the error between the predicted value of the model and test results was controlled within ± 6%. The temperature rise distribution law was in good agreement with actual situation. The multi-physics two-way coupling anlysis method adopted in this paper overcomes the inaccurate of loss calculation by the traditional magnetic circuit method. It can provide loss prediction methods and calculation data at the initial stage of transformer product development, and significantly improve the operating efficiency of related electrical equipment.
Key wordsFoil-type windings    eddy-current losses    magnetic-thermal-fluid coupling    temperature rise   
收稿日期: 2019-09-25     
PACS: TM412  
基金资助:国家自然科学基金(51777055, 51807048)和河北省杰出青年科学基金(E2018202301)资助项目
通讯作者: 张长庚 男,1985年生,副教授,硕士生导师,研究方向电磁场数值计算和磁特性建模。E-mail:changgeng.zhang@hebut.edu.cn   
作者简介: 李永建 男,1978年生,教授,博士生导师,研究方向为工程电磁场与磁技术、三维磁特性测量与建模。E-mail:liyongjian@hebut.edu.cn
引用本文:   
李永建, 闫鑫笑, 张长庚, 陈怡帆, 盈文亮. 基于磁-热-流耦合模型的变压器损耗计算和热点预测[J]. 电工技术学报, 2020, 35(21): 4483-4491. Li Yongjian, Yan Xinxiao, Zhang Changgeng, Chen Yifan, Ying Wenliang. Numerical Prediction of Losses and Local Overheating in Transformer Windings Based on Magnetic-Thermal-Fluid Model. Transactions of China Electrotechnical Society, 2020, 35(21): 4483-4491.
链接本文:  
https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.191227          https://dgjsxb.ces-transaction.com/CN/Y2020/V35/I21/4483