多电平功率变换器主电路拓扑结构综述

主电路拓扑结构是多电平功率变换器研究的关键内容之一。中高压功率变换器高电压、大容量的特点，客观上决定了其主电路由较多的主开关器件组成，主电路构成元件的增加决定了其拓扑结构的丰富多样。本文对近年来多电平变换器的主电路拓扑结构的发展进行了较为详细的综述研究，对其发展趋势进行展望，认为除了采用传统的依靠灵感和经验来发展新拓扑外，更重要的是寻找一种严密、科学、系统的拓扑发展方法，从而找到多电平功率变换器的拓扑结构的完善集，并根据实际应用研究具体拓扑的最优化方案，以实现高性能、高可靠、低成本的功率变换系统。

Development of Topologies of Multilevel Power Converters

Topology is one of the most important content for studying multilevel power converters. The great number of switching devices involved in the Medium-high voltage power converter resulted in the abundance of its topologies. Development of the recent topologies of multilevel converters is summarized. Besides the traditional methods for finding of new topologies based on inspiration and experience, systemic and rigorous method based on mathematics should be found for research of new topologies and its optimization.