电力变压器磁-流-热双向耦合研究  

Research on magnetic-fluid-thermal bidirectional coupling of power transformer

作　　者：徐嘉辉 阎秀恪[1] 李岩冰[2] 任自艳[1] 张殿海[1] XU Jiahui;YAN Xiuke;LI Yanbing;REN Ziyan;ZHANG Dianhai(School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China;Anshi Asia Pacific Technology Co.,Ltd.,Beijing 100027,China)

机构地区：[1]沈阳工业大学电气工程学院,辽宁沈阳110870 [2]安世亚太科技股份有限公司,北京100027

出　　处：《电气应用》2023年第9期33-40,I0004,I0005,共10页Electrotechnical Application

基　　金：辽宁省教育厅面上项目(LJKZ0125);辽宁省研究生教育教学改革研究项目(LNYJG2022060)。

摘　　要：为提高油浸式电力变压器内部温度场仿真计算的准确度,考虑温度对变压器绕组、拉板、夹件以及变压器油物理参数的影响,对其内部电磁场、温度场及流体场的控制方程和耦合关系进行研究。电磁场部分基于有限元法计算,温度场与流体场采用有限体积法进行直接耦合求解。通过热源加载和反馈,实现三场之间的耦合。针对一台额定容量为241 MV·A的单相压轭变压器,采用Maxwell软件,基于场路耦合法对额定运行状态下的电磁场和各结构的损耗分布进行了仿真。将这一损耗作为热源加载到热流分析软件Icepak中,并将仿真出的温度反馈回电磁场中重新计算损耗,实现磁-流-热双向耦合的迭代过程。结果表明:建立的仿真模型能充分考虑三场间耦合关系,提高了计算结果的准确性,能够为变压器的设计和工程应用提供一定的参考。In order to improve the accuracy of the simulation calculation of the internal temperature field of oilimmersed power transformer,the controlling equations and coupling relationships of its internal electromagnetic field,temperature field and fluid field are studied considering the influence of temperature on the transformer winding,pulling plate,clamped parts and physical parameters of transformer oil.The electromagnetic field is partially calculated based on the finite element method,and the temperature field and fluid field are solved by direct coupling using the finite volume method.The coupling between the three fields is achieved through heat source loading and feedback.For a single-phase voltage yoke transformer with a rated capacity of 241 MV·A,Maxwell software is used to simulate the electromagnetic field and the loss distribution of each structure under rated operation based on the field-path coupling method,and this loss is loaded into the heat flow analysis software Icepak as a heat source,and the simulated temperature is fed back into the electromagnetic field to recalculate the loss,realizing the two-way coupling of magnetic-fluid-thermal The iterative process.The results show that:The established simulation model can fully consider the coupling relationship between the three fields,improve the accuracy of the calculation results,and can provide some reference for the design and engineering application of transformers.

关 键 词：多物理场 场路耦合 磁-流-热耦合 热点温升 

分 类 号：TM41[电气工程—电器]