【作者】 郭斌；

【导师】 宋执权； 张明；

【作者基本信息】 华中科技大学 ， 电气工程， 2013， 硕士

【摘要】 ITER是人类探索和平利用核聚变能源重要实验装置，由中国、美国、俄罗斯、欧盟、日本、印度和韩国七方共同建造。ITER极向场变流器系统是ITER托卡马克核聚变装置电源系统的重要组成部分，交直流母线作为变流器系统的重要子系统之一，其稳定运行是变流器系统实现正常运行的重要保证。本文对变流器电源系统的交流母线和直流母线的进行了分析和设计。本文对交流母线进行了分析设计，首先基于ANSYS有限元分析软件确定了交流母线的最优截面，然后对敞露式交流母线在不同相序、不同墙壁开孔尺寸、不同墙壁开孔结构三个方面进行了仿真分析。仿真结果显示敞露式交流母线会引起墙壁及其周围铁磁物质的局部温升不能够满足交流母线的设计要求，需要使用带屏蔽交流母线来解决母线周围铁磁物质的涡流发热问题。其次，经过对比离相和共箱的带屏蔽交流母线的分析结果得出离相带屏蔽交流母线的电磁特性和结构特性要明显优于共箱带屏蔽母线。最后，运用母线热守恒的理论计算方法对自冷、风冷、水冷三种不同冷却方式的交流带屏蔽母线和采用同相逆并联连接方式的交流母线进行了分析与设计，并且利用ANSYS和Fluent等有限元分析软件对4种不同形式的交流母线结构进行了电磁特性和热特性的仿真验证计算。通过对比4种不同形式的交流母线的分析结果，得出水冷带屏蔽交流母线具有结构简单、成本低、运行稳定等优点。因此通过上述分析，水冷带屏蔽交流母线是ITER极向场变流器电源系统交流母线最优化的选型方案。本文同时还对直流母线进行了分析与设计，首先利用母线热平衡和有限元分析相结合的方式分析设计了直流母线水冷和自冷两种冷却方式不同的结构形式，通过对比两种冷却方式的仿真计算结果，得出水冷直流母线为直流母线最优化的解决方案。然后，分别设计了水冷直流母线不同类型的转接头以便于水冷直流母线的安装，并且利用有限元仿真软件ANSYS和Fluent对设计方案进行了相应的热力学和结构力学校核。最后，对直流母线在故障状态下母线所受到的电动力和引起的变形进行了分析计算，以此确定了支撑母线的绝缘子的安装间距。更多还原

【Abstract】 ITER is of great important for the mankind to achieve the peaceful use of fusionenergy, which is constructed jointly by China, the United States, Russia, the EuropeanUnion, Japan, India and South Korea seven countries. The ITER PF converter module isthe most important subsystem of power supply system for ITER tokamak device.AC&DC busbar is the key component of the converter module, its stable operation is theguarantee of the normal operation of the converter system. The AC&DC busbar has beenanalyzed and designed in this paper.In the process of the AC busbar analysis and design，the cross-section of the ACbusbar has been optimized and bare busbar without shielding has been simulated indifferent busbar phase sequence, different hole size and different wall structure types byusing FEM software ANSYS. The simulated result of bare busbar indicated that theshielding is necessary for the AC busbar to decrease the temperature rise of componentbesides the AC busbar. Secondly from the contrast of simulation result of isolatedenclosure busbar and common enclosure busbar, the isolated enclosure busbar have moreadvantages than another type. Lastly, the structure of water cooling，air cooling andnatural cooling3cooling kinds of AC busbar and the AC busbar in cophase anti parallelconnection type have been designed by the conservation of energy for AC busbar. Theanalysis result of4types prove that the Water cooling with circle shielding has moreadvantages than other3types which is the best solution for AC Busbar.This paper also analyzes different cross-section and different thermodynamicproperties under the natural-cooling and water-cooling conditions, and it is simulated bythe software of finite element method（FEM）, the result of analysis is shown that thewater-cooling method is the better choice for the DC busbar. In addition, theinterconnection of the DC busbar in water cooling was designed for its installation and their thermal and structure properties have been get by software ANSYS. Lastly, the maxequivalent stress and the electromagnetic force of DC busbar in short current has alsobeen got for installation.更多还原