2017年10月电工技术学报Vol.32 Sup.2 第32卷增刊2 TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY Oct. 2017
DOI: 10.19595/https://www.doczj.com/doc/c217337662.html,ki.1000-6753.tces.L70363
EAST快控电源中空心电抗器的电磁屏蔽计算
鲍晓华1胡云鹏1张程1高格2
（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）
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。
关键词：EAST快控电源空心电抗器金属网屏蔽系数
中图分类号：TM471
Electromagnetic Shielding Calculation of Air Core Reactor in
EAST Fast Control Power Supply
Bao Xiaohua1 Hu Yunpeng1 Zhang Cheng1 Gao Ge2
(1. School of Electrical Engineering and Automation Hefei University of Technology Hefei 230009 China
2. Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China)
Abstract 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 3D models are established. The metal mesh of different materials (DT4A, GO, 1008steel) 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 DT4A is best when the single metal mesh is shielded, and the shielding effect of DT4A/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.
Keywords：EAST fast control power supply, air core reactor, metal mesh, shielding factor
0引言
EAST快控电源对于维持等离子体在聚变装置中垂直方向上的稳定性有着重要作用，它采用了两种方式（不控整流和PWM逆变），通过跟踪总控给定信号，向快控电源的线圈输出电流或电压[1]。为了提高快控电源系统运行的可靠性和稳定性，必须分析快控电源中均流电抗器（即空心电抗器）在通
国家自然科学基金资助项目（51377039）。收稿日期2016-08-19 改稿日期2016-11-29
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