1.2MV·A混合钳位五电平变流模块的结构布局优化和叠层母排设计  

Engineering Design for Structure and Bus Bar of 1.2MV·A Hybrid Clamped Five-Level Converter Module

作　　者：董玉斐 罗皓泽[1] 杨贺雅 何原明[1] 李武华[1] 何湘宁[1] 

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《电工技术学报》2016年第8期11-18,共8页Transactions of China Electrotechnical Society

基　　金：国家重点基础研究发展计划(973计划)项目子课题(2014CB-247400);国家自然科学基金(51490682)资助项目

摘　　要：多电平技术是高压大功率变流器的主要解决方案之一,由于电容电压平衡及母排设计等技术问题的限制,三电平以上的二极管钳位型NPC多电平系统在工业中应用较少。为了促进具有电容电压自平衡能力的混合钳位五电平拓扑的大功率工业应用,针对混合钳位五电平电路三相1.2MV·A应用要求,进行了单相变流模块的结构布局和叠层母排设计。首先研究了该拓扑冲击电流产生的根本原因及抑制方法,提出冲击电流抑制对于结构布局的要求;其次,结合冲击电流抑制及NPC四电平电路对称性特点,对混合钳位五电平拓扑大功率应用的结构布局方式进行了工程设计;最后,在该布局方式下结合NPC四电平拓扑的换流特点,通过Ansoft Q3D软件进行了叠层母排的连接设计。最终研制出单相400k W变流模块,测试结果表明其符合设计要求。Multilevel is a key technology to high power converters. Limited by the technical problems such as DC voltage unbalance and bus bar design, only the NPC three-level is widely used in industry for neutral point clamped multilevel topology. The hybrid clamped five-level is a novel topology in which DC voltage can be self-balanced. To promote this topology＇s application, engineering design for structure and bus bar of a 1.2MV·A converter module is discussed in this paper. The mechanism and limitation methods of the surge current in this topology are first studied. Then the structure and layout design are carried out following the principle that surge current is easy to restrain and bus bar is easy to design. Finally the laminated bus bar is presented and simulated through Ansoft Q3 D, and the 400 k W one phase prototype is completed. Consequently, the experimental results have verified the structure and bus bar.

关 键 词：大功率变流模块 混合钳位五电平 结构设计 叠层母排 

分 类 号：TM46[电气工程—电器]