EAST快控电源中空心电抗器的电磁屏蔽计算  

Electromagnetic Shielding Calculation of Air Core Reactor in EAST Fast Control Power Supply

作　　者：鲍晓华[1] 胡云鹏[1] 张程[1] 高格[2] 

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]中科院等离子体物理研究所,合肥230031

出　　处：《电工技术学报》2017年第A02期64-70,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51377039)

摘　　要：针对EAST快控电源系统中空心电抗器运行时产生的磁场对周围电子设备干扰的问题,提出利用金属网屏蔽磁场的理论,通过解析计算得到单层和双层金属网屏蔽时屏蔽系数的表达式。参照现场实物建立多个三维模型,选择不同材料(DT4A,GO,1008steel)的金属网,采用三维有限元和Matlab仿真的方法,获得电抗器周围柜体屏蔽前后磁通密度的分布情况,进而分析了屏蔽系数与网孔数目、激励频率、距离的关系。结果表明,单层金属网屏蔽时,DT4A的屏蔽效果最好;双层金属网屏蔽时,DT4A/GO的屏蔽效果最好。总体而言,双层比单层屏蔽更加有效。对进一步研究空心电抗器的安全运行具有重要意义。In experimental advanced superconducting Tokamak（EAST） power system, the magnetic field can cause interference of the magnetic field to the surrounding electronic equipment in operation of air core reactor. In this paper, the theoretical analysis of shielding magnetic field of metal mesh is presented. The expressions of shielding factor of single layer metal mesh and double layer metal mesh are obtained by analytical calculation. Based on the physical model, a number of 3 D models are established. The metal mesh of different materials（DT4 A, GO, 1008 steel） is selected as a shield. Using three-dimensional finite element method and Matlab simulation and flux density distribution around the shield cabinet were obtained. Then, analysis of the shielding coefficient and the three influencing factors, three factors are number of mesh, excitation frequency and distance. The results show that the shielding effect of DT4 A is best when the single metal mesh is shielded, and the shielding effect of DT4 A/GO is best when the double metal mesh is shielded. Overall, the double layers are more effective than single layer shields. To further study the safety operation of the air core reactor is of great significance.

关 键 词：EAST快控电源 空心电抗器 金属网 屏蔽系数 

分 类 号：TM471[电气工程—电器]