一种改进的级联型多电平变换器拓扑  

AN IMPROVED CASCADED MULTILEVEL INVERTER TOPOLOGY

作　　者：陈阿莲[1] 何湘宁[1] 赵荣祥[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《中国电机工程学报》2003年第11期9-12,共4页Proceedings of the CSEE

基　　金：国家自然科学基金(50277035);国家教育部科技发展重点项目(重点02044)~~

摘　　要：该文提出了一种改进的级联型多电子变换器,它可以由任意个H-桥单元级联构成。其中的H-桥可以是两电平,也可以是二极管箝位型或电容箱位型的任意电平,不同单元采用不同的独立直流电压源。相对于传统的级联型拓扑,在得到相同输出电平的情况下,新拓扑可以使用较少数量的开关器件和较少数量的独立电压源,从而简化电路,降低成本。该文以两电平H-桥(2-H)和飞跨电容型三电平H-桥(3-H)级联构成的拓扑为例进行了分析研究和仿真验证。An improved cascaded multilevel inverter topology is proposed in this paper, which is composed by any number of H-bridge cells. The H-bridge cells may be two-level ones, or any level of diode-clamped or flying-capacitor ones. Different separate voltage sources may be used in different cells. Relative to conventional cascaded topology, the new topology needs fewer switching devices and fewer separated voltage sources when producing the same number of output levels, which simplifies circuit and saves costs. As an example, a topology composed by a two-level H-bridge cell and a three-level flying-capacitor H-bridge cell is researched and simulated in this paper.

关 键 词：级联型多电平变换器 拓扑结构 H-桥单元 工作原理 

分 类 号：TN624[电子电信—电路与系统]