有源中点钳位三电平零电流转换软开关变流器  

Three-Level Active Neutral-Point-Clamped Zero-Current-Transition Converter

作　　者：李锦[1] 刘进军[1] 

机构地区：[1]西安交通大学电气工程学院,西安710049

出　　处：《电工技术学报》2013年第3期195-201,233,共8页Transactions of China Electrotechnical Society

摘　　要：提出了一种新型的有源中点钳位三电平零电流转换软开关变流器拓扑。该软开关拓扑每个桥臂使用两个辅助开关管和一个LC谐振支路实现了所有主开关的软闭合和软分断,同时辅助开关管没有开关损耗,此外开关过程产生的电压电流尖峰也大大减少。辅助开关管只在换流过程工作,其电流额定值远小于主开关,而且所有开关管的电压应力都被钳位为直流电压的1/2。该软开关变流器特别适合于中压大功率功率变换应用场合,可有效提高系统效率和开关频率。对电路的工作原理和谐振支路的设计进行了深入地分析,并通过一台80kW的半桥样机对提出拓扑可行性和优点进行了验证。This paper proposes a novel three-level active neutral-point-clamped zero-current- transition （ANPC-3L ZCT） converter. The proposed soft-switching topology employs two auxiliary switches and an LC resonant tank for each phase leg to achieve soft commutation of main switching devices. The voltage stress of all the switches is clamped to half of dc link voltage and the auxiliary switches have a much lower current rating than the main switches. Besides that the auxiliary switches have no switching losses. The operation principle and design of resonant tank is analyzed in details in this paper. An 80kW half-bridge prototype of the ANPC-3L ZCT inverter is built. The effectiveness and advantages of the proposed topology are verified experimentally.

关 键 词：功率变换 逆变器 有源整流器 软开关 多电平变流器 

分 类 号：TM46[电气工程—电器]