摘要
考虑到结构网格与非结构网格在变压器内部温度场及油流场数值模拟中计算效率和计算精度方面的技术缺陷,对一台单相试验变压器三维模型进行多面体网格剖分,完成了不同负载系数下变压器内部温度场及油流场的仿真计算。此外,为验证仿真模型,对试验变压器进行了温升试验。研究结果表明：在相同的基准尺寸下,与非结构四面体网格相比,多面体网格能大大减少网格单元数量,仅为四面体网格数量的1/3,在计算达到收敛时所需时间为四面体网格的1/9,所占用计算机内存为四面体网格的1/2,且得到的温度场与油流场分布较好;数值计算值与现场测量值的对比验证了多面体网格在变压器内部温度场及油流场数值模拟应用中的有效性与准确性,为以后大型变压器的三维数值计算与网格处理提供了新的思路与参考。
To overcome the technical defects of calculation efficiency and discretization accuracy in the numerical simulation of the temperature field and the oil flow field in the transformer by using structured mesh and unstructured mesh, a three-dimensional model for a single-phase test transformer was divided by using polyhedral mesh technology to calculate the temperature field and the oil flow field of the transformer under different load factors. In addition, in order to verify the simulation model, the tests for transformer temperature rise test were performed. The results show that, compared with the unstructured mesh, polyhedral mesh can greatly reduce the number of cells in the same basic size, which is 1/3 of tetrahedral mesh. The convergence time and the occupied computer memory are 1/9 and 1/2 of the tetrahedral mesh, respectively. Besides, the distribution of the temperature field and oil flow field is realistic and reliable. The comparison between the numerical results and measured values shows that the effectiveness and accuracy of polyhedral mesh in the numerical simulation of the temperature field and the oil flow field of the transformer, which provides a new idea and reference for the three-dimensional numerical calculation and mesh generation of large power transformers.
作者
周利军
唐浩龙
王路伽
蔡君懿
ZHOU Lijun;TANG Haolong;WANG Lujia;CAI Junyi(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2018年第11期3524-3531,共8页
High Voltage Engineering
基金
国家自然科学基金(51577159)
四川省科技计划(2016JY0004)~~
关键词
变压器
多面体网格
负载状态
温度场
油流场
transformer
polyhedral mesh
load condition
temperature field
oil flow field
