沈阳工业大学学报2012，Vol.34Issue(4)：366-371,6.
变压器磁-热耦合计算与局部过热屏蔽措施
Magnetic-thermal coupling calculation and shielding measure of local overheating for transformer
摘要
Abstract
In order to solve the problems concerning both eddy current loss and local overheating in large power transformer, the three-dimensional （3D） finite element calculation of eddy current field was adopted to obtain the eddy current loss and its distribution for the fuel tank and clamps of transformer, and a magnetic-thermal coupling method was used to calculate the temperature field distribution and hot spot temperature of the fuel tank and clamps. And thus, the local overheating problem was analyzed, and the hottest spot was found out. In addition, the corresponding magnetic shielding was applied to reduce the eddy current loss and temperature rise of the fuel tank and clamps. Finally, the influence of the size of the magnetic shielding structure on both eddy current loss and hottest spot temperature of the fuel tank and clamps was analyzed. After adopting the magnetic shieding measure, the eddy current loss and hot spot temperature of the fuel tank and clamps decrease significantly, and the local overheating phenomenon is prevented efficiently, which can provide the references for the optimization design of power transfomler.关键词
电力变压器/温度场/涡流损耗/局部过热/磁热耦合/磁屏蔽/有限元法/热点温度Key words
power transformer/temperature field/eddy current loss/local overheating/magnetic-thermalcoupling/magnetic shielding/finit element method/hot spot tempreture分类
信息技术与安全科学引用本文复制引用
李岩,额尔和木巴亚尔,张霄霆,井永腾,李晓辉..变压器磁-热耦合计算与局部过热屏蔽措施[J].沈阳工业大学学报,2012,34(4):366-371,6.基金项目
辽宁省高校创新团队资助项目（LT2010080）. （）
