一种新型开关电容型Z源逆变器  

New type switched-capacitor Z-source inverter

作　　者：王思[1] 庄圣贤[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《电源技术》2015年第10期2228-2231,共4页Chinese Journal of Power Sources

摘　　要：针对传统Z源逆变器的直流升压因子较小、输入电流断续等缺点,提出一种新型的开关电容型Z源逆变器。开关电容型Z源逆变器保留了X型的基本结构,输入端口的2个电容和2个二极管形成开关电容结构。对开关电容型Z源逆变器的工作原理进行了详细分析,与传统Z源逆变器相比,开关电容型Z源逆变器大大地提高了电压的升压能力,只需要一个很短的直通零矢量时间就能获得高电压增益,且启动时具有抑制冲击电流的能力。同时可以保证输入电流的连续性,提高直流侧的电压利用率。此外,开关电容型Z源逆变器同样适用于燃料电池和光伏发电等分布式能源中。最后,通过仿真验证了理论分析的正确性。Aiming at the low DC boost capacity, discontinuity of the input current in the conventional Z-source inverter,a novel Z-source inverter topology based on switched capacitor was presented. The basic structure of X was retained by switched-capacitor Z-source inverter, also two capacitors and two diodes in the input form the switched-capacitor structure were retained. A detailed topology analysis of the switched-capacitor Z-source inverter was given. Compared with the conventional Z-source inverter, the voltage boost inversion ability significantly was increased. Only a very short shoot-through zero state was required to obtain high voltage conversion ratios. And it could suppress inrush current at startup. At the same time, the continuity of the input current could be guaranteed by the switched-capacitor Z-source inverter, and the utilization of the input voltage could be improved. In addition,switched-capacitor Z-source inverter was also applicable to distributed energy sources such as fuel cells and photovoltaic applications. At last, the analytical results were verified.

关 键 词：Z源逆变器 开关电容 拓扑 直通状态 

分 类 号：TM464[电气工程—电器]