大型单相电力变压器结构件三维漏磁场计算  

Calculation of 3D leakage magnetic field for structural members of large-scale single-phase power transformer

作　　者：张艳丽[1] 晏冰[2] 崔萧 谢德馨[1] 朱占新[3] 孙小光[1] 王禹雄 

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870 [2]特变电工沈阳变压器集团有限公司人力资源部,沈阳110144 [3]特变电工沈阳变压器集团有限公司技术基础部,沈阳110144 [4]太平湾发电站发电部,辽宁丹东118000

出　　处：《沈阳工业大学学报》2013年第6期613-617,共5页Journal of Shenyang University of Technology

基　　金：霍英东教育基金会青年教师基金资助项目(121059);高等学校博士学科点专项科研基金资助项目(20102102120002)

摘　　要：为了获得油箱等结构件中涡流损耗的准确结果,通常采用网格加密方法,但这会引起计算规模的扩大,使得有限的计算机资源无法实现实际的仿真计算.以500 kV单相电力变压器产品为算例,完成了三维漏磁场和涡流损耗的准确计算.讨论了金属结构件"大尺度差别"问题的合理剖分方法,重点研究了在金属结构件透入深度范围内进行分层剖分生成网格的方法,并将涡流损耗的仿真计算值与试验实测值进行了对比验证.计算结果表明,随着剖分层数的增加,涡流损耗的计算结果将趋于稳定,在计算规模和求解精度之间寻求折中方案,建议对透入深度小于1 mm的油箱分层数不应小于4.In order to obtain more accurate computational results for eddy current loss of structural members such as oil tank, the mesh refinement method was generally adopted, which might increase the computation scale and even fail to realize the practical simulation computation with the limited computer resources. Through taking the 500 kV single-phase transformer as example, the 3D leakage magnetic field and eddy current loss computation were accomplished, and the reasonable mesh generation method for the large-scale difference problem of metal structure members was discussed. The layer-subdivided mesh method within the penetration depth of metal structural members was mainly investigated. In addition, the simulated results for the eddy current loss were compared with the experimental ones. The computational results show that with increasing the number of mesh layers, the computational results of eddy current loss tends to be stable. In order to search a compromise scheme between the computation scale and solution accuracy, it is recommended that the number of mesh layers for oil tank with the penetration depth less than 1 mm should be not less than 4.

关 键 词：单相变压器 涡流损耗 透入深度 结构件 油箱 三维漏磁场 表面阻抗法 分层剖分法 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]