高压大功率E型变压器漏感有限元仿真计算  

FEA-based calculation of leakage inductance for high-voltage high-power E-core transformer

作　　者：王亚超[1] 刘军[1] 何湘宁[1] 

机构地区：[1]浙江大学电力电子技术国家专业实验室,浙江杭州310027

出　　处：《电力自动化设备》2013年第2期109-114,共6页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(50737002)~~

摘　　要：针对无气隙、磁芯中柱为矩形的E型变压器,建立了二维ERXP模型。分别在垂直和平行于磁芯最长边的2个截面建立ER模型和XP模型。保持中柱截面积不变,将矩形截面等效为圆形截面,等效后,ER模型和XP模型磁芯中柱磁阻必须与变压器实际磁阻一致,由此求出ER模型和XP模型的相关尺寸,完成模型建立;将ER模型和XP模型的仿真结果进行加权平均后,等效为实际变压器的三维磁场分布,进行漏感计算。仿真结果表明,考虑涡流效应时,漏感能量主要集中在初级和次级绕组之间,符合理论分析;根据ERXP模型仿真所得的变压器漏感为7.25μH,与实测值(7.60μH)的误差为4.6%,准确性高于一维解析算法。A two-dimensional ERXP model is built for the gapless E-core transformer with rectangular interior column. Its ER model is built on the section perpendicular to the longest edge of magnetic core and its XP model on the section parallel to the longest edge. The rectangular section is then equivalent to a circular section with same area. The dimensions of ER or XR model are calculated while keep the magnetic resistance of its interior column equal to that magnetic field of actual transformer is equivalent to the of the actual transformer. The three dimensional weighted average of the simulated results of two models,based on which,the leakage inductance is figured out. Simulative results show that the energy of the leakage inductance is mainly concentrated between the primary and the secondary windings,consistent with the theoretical analysis. The leakage inductance calculated with the ERXP model is 7.25 μH,4.6% lower than the measured leakage inductance（7.6 μH）,better than the one dimensional analysis.

关 键 词：变压器 二维有限元 模型 LCC谐振变换器 E型磁芯 漏感 涡流效应 

分 类 号：TM433[电气工程—电器] TM15