該文在研究傳統的級聯型多電平逆變器的基礎上提出了一種多電平逆變器基本構 成單元的概念，并從這一概念出發，提出了基于基本構成單元串-并、并-串思想生成多電平逆變器拓撲的方法。以此方法得到的大量多電平逆變器拓撲，不僅涵蓋了已有的基本多電平電路拓撲，而且得到一些新的拓撲結構，從而將多電平變換拓撲統一在基本構成單元的概念之內。為了驗證所得到拓撲的正確性，以串－并拓撲為例，進行了仿真和實驗驗證。這一概念也為多電平逆變器新拓撲的生成提供了思路。
關鍵詞：多電平逆變器 基本單元 拓撲

Abstract ：:On the basis of the conventional multilevel cascade voltage source inverte，a new research clew to construct multilevel Inverter topologies is proposed, which is based on the concept of basic cells and their series-parallel and parallel-series connections. A series of
multilevel converter topologies are deduced from the clew, which include the existing topologies and many new ones. To confirm the validities of the new topologies, one of them are taken as examples for simulations and experiments, and the results showed the validities. This paper provides a new direction for construction more novel multilevel converter topologies.
Keywords：Multilevel Inverter，basic cell，topology