基于电磁-流热双向耦合的变压器绕组温升计算及结构参数优化
Temperature Rise Calculation and Structure Optimization Research of Transformer Winding Based on Electromagnetic-fluid-thermal Coupling
袁发庭 1杨文韬 2韩毅凛 2陈炜 3姜岚 2唐波1
作者信息
- 1. 湖北省输电线路工程技术研究中心(三峡大学),宜昌 443002;三峡大学电气与新能源学院,宜昌 443002
- 2. 三峡大学电气与新能源学院,宜昌 443002
- 3. 国网湖南省电力有限公司电力科学研究院,长沙 410007
- 折叠
摘要
变压器温升是影响其运行状态和使用寿命的关键因素.为了更准确地得到油浸式变压器绕组区域的温度场分布,采用有限元法对绕组的电磁-流热耦合过程进行了数值研究.根据电磁场及流体-温度场分布的特点,建立了变压器及绕组区域的计算模型.基于异构网格节点数据映射方法,将电磁场分析得到的绕组非平均损耗作为热源边界条件加载到流体-温度场计算网格中,并根据每次迭代时的温度对该热源进行修正,实现电磁-流热的双向耦合.在此基础上,建立热点温度与绕组结构参数之间的响应面,开展了对绕组热点温度及导体材料用量最小化的多目标优化研究.采用非支配排序遗传算法(non-dominated sorting genetic algorithm,NSGA-Ⅱ)获得了Pareto最优解,并对Pareto前沿面上的4种优化方案进行了分析.结果表明,优化后的绕组热点温度及导体用量明显降低.该文研究为变压器结构的优化设计提供了一种可行方法.
Abstract
The temperature rise of transformer is the key factor affecting its operating state and service life.In order to obtain the temperature distribution of an oil-immersed transformer in the winding area accurately,the electromagnet-ic-fluid-thermal coupling process of the winding is numerically studied by the finite element method(FEM).According to the distribution characteristics of electromagnetic and fluid-temperature field,the calculation models of transformer and winding are established,respectively.Based on heterogeneous grid node data mapping method,the non-average winding loss obtained from the electromagnetic field analysis is loaded into the fluid-temperature field grid as the heat source,and the heat source is modified according to the temperature at each iteration.The bidirectional coupling between electro-magnetic field and fluid-temperature field is realized.On this basis,the response surface of the hot pot temperature and winding structure parameters is established,and the multi-objective optimization research with the purpose of minimizing the winding hot spot temperature and conductor material consumption is carried out.The Pareto optimal solution is ob-tained by the non-dominated sorting genetic algorithm(NSGA-Ⅱ),and the four optimization schemes on the Pareto front are analyzed.The results show that the optimized winding hot spot temperature and the amount of conductor are signifi-cantly reduced.The research of this paper provides a feasible method for the optimal design of transformer structure.
关键词
油浸式变压器/电磁-流热耦合/绕组结构参数/响应面法/多目标优化Key words
oil-immersed transformer/electromagnetic-fluid-thermal coupling/winding structure parameters/response surface methodology/multi-objective optimization引用本文复制引用
基金项目
湖北省教育厅科学技术研究项目(Q20211212)
宜昌市科技计划(A21-3-010)
出版年
2024
国家科技期刊平台
NSTL
万方数据