一种混合结构二倍升压九电平逆变器  

Double Boost Nine-level Inverter with Hybrid Structure

作　　者：潘健[1] 陈光义 陈庆东 熊嘉鑫 PAN Jian;CHEN Guangyi;CHEN Qingdong;XIONG Jiaxin(School of Electrical and Electronic Engineering,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]湖北工业大学电气与电子工程学院,武汉430068

出　　处：《电源学报》2024年第6期69-80,共12页Journal of Power Supply

基　　金：太阳能高效利用及储能运行控制湖北省重点实验室开放基金资助项目(HBSEES201902)。

摘　　要：将开关电容的升压能力与耦合电感的均压特性相结合,提出1种具有二倍升压能力及减少组件的新型九电平逆变器拓扑。该逆变器由12个开关元件、2个开关电容和1个反极性耦合电感组成。其中,所提逆变器的电容器充放电自平衡,不需要额外的平衡电路,且相较于目前大部分基于开关电容的九电平逆变器,该拓扑的开关电容容量更小。通过使用反极性耦合电感,提升了输出电压电平数量,降低了部分开关50%的电流应力,有利于开关损耗的进一步降低。详细讨论了所提拓扑的工作模式、调制策略、开关电容器设计和损耗分析,并将所提拓扑与其他部分九电平拓扑进行比较,介绍了该拓扑的优点。仿真和实验结果验证了该拓扑的有效性。A novel nine-level inverter topology with double boost and reduced components is proposed by combining the voltage boost capacity of switched capacitors with the voltage halving characteristics of a coupling inductor.This inverter consists of 12 switches,2 switched capacitors and 1 reverse polarity coupling inductor.The charging and discharging of each capacitor in the inverter can maintain a self-balance,so the additional balance circuit is not needed.Compared with the topologies of most of the existing nine-level inverters that are based on switched capacitors,the proposed topology has a smaller capacity of switched capacitor.The output voltage levels are greatly increased by the adoption of the reverse polarity coupling inductor,and the current stresses on some switches are reduced by half,which can further reduce the switching loss.The working modes,modulation strategy,design of switched capacitors and loss analysis of the proposed topology are discussed in detail.In addition,the proposed topology is compared with those of other nine-level inverters,and its advantages are introduced.Finally,simulation and experimental results verified the effectiveness of the proposed topology.

关 键 词：开关电容 九电平逆变器 耦合电感 二倍升压 

分 类 号：TM46[电气工程—电器]