变压器漏感的有限元计算  

Finite Element Method in Calculation of Power Transformer Leakage Inductance

作　　者：毕艳军[1] 于敏丽[1] 郭臻 

机构地区：[1]邢台职业技术学院电气工程系,河北邢台054000 [2]国网河北电力公司邢台供电分公司,河北邢台054001

出　　处：《实验室研究与探索》2017年第7期122-126,共5页Research and Exploration In Laboratory

摘　　要：由于变压器漏磁场的存在,导致变压器的损耗增加,运行效率降低,出现局部过热,绕组变形等情况,甚至导致变压器绝缘损坏,对变压器安全稳定运行造成巨大的威胁。本文基于有限元法,建立了真型10 k V三相变压器二维和三维短路试验模型。依次仿真了二维、三维变压器模型得到了漏磁场、漏感结果,并将结果与现场试验测得值以及理论计算值进行对比,得出了结论:进行短路试验仿真,二维仿真模型漏感误差仅为7.6%,结果优于三维仿真模型,而二维、三维仿真模型均优于传统磁路法;通过有限元法建立的二维变压器绕组仿真模型可以准确计算电力变压器漏感。The leakage magnetic field of transformer causes increasing loss,local overheating,winding deformation,etc.,and leads to damage to the insulation of the power transformer and is a huge threat to transformer safe and stable operation. Based on the finite element method,2D and 3D simulation models of 10 k V real-scale transformer are established,and the models are used to study characteristics of the leakage inductance in different conditions. The simulation results of leakage inductance are also compared between the measured value and theoretical calculation value.The results are that for short-circuit test simulation,error of 2D simulation model＇s leakage inductance is only 7. 6%,better than the results of 3D simulation model. Simulation models are superior to traditional magnetic circuit method,which means that finite element modeling is accurate and correct.

关 键 词：变压器 漏感 电磁场 有限元法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]