高电压技术2012，Vol.38Issue(8)：1988-1994,7.
高压自耦变压器的涡流损耗计算与屏蔽措施
Eddy Current Losses Calculation and Shields of High Voltage Auto-transformer
摘要
Abstract
In order to analyze the leakage magnetic field and eddy current losses in large-scale power transformer,taking the nonlinear magnetic B-H characteristics of core,tank and magnetic shield material into account,we computed the leakage magnetic field and eddy current loss in tank,yoke clamps,and other conductive construction parts of high voltage auto-transformer by three-dimensional（3D）nonlinear time harmonic finite element method.The results show that eddy current losses and loss density in tank wall and yoke clamps are large,may cause local overheating,and affect normal operation of the transformer.The magnetic shields added to tank wall and yoke clamps were used to reduce the eddy current loss in tank wall and yoke clamps of power transformer,and effects of those shields on leakage magnetic field and eddy current loss of construction parts were discussed.The results show that eddy current losses and hot spots can be reduced and eliminated effectively by adding magnetic shield to tank wall and yoke clamps.The different types of shields have different influences on leakage magnetic field and eddy current losses in construction parts of transformer.关键词
自耦变压器/磁屏蔽/涡流损耗/漏磁场/有限元法（FEM）/非线性涡流场Key words
auto-transformer/magnetic shield/eddy current loss/leakage magnetic field/finite element method(FEM)/nonlinear eddy current field分类
信息技术与安全科学引用本文复制引用
井永腾,李岩,额尔和木巴亚尔..高压自耦变压器的涡流损耗计算与屏蔽措施[J].高电压技术,2012,38(8):1988-1994,7.基金项目
国家自然科学基金 （）
辽宁省高校创新团队支持计划 （）
