An efficient and cost-effective power converter is a pre-requisite for the modern power applications. With the evolvement of matured medium power self-commutated switching devices, multilevel inverters (MLIs) are emerged as a promising solution for high-power medium-voltage applications. Though, MLIs are performing a promising role in industrial applications, their high device count, size, cost and control complexities have restricted their market penetration. To address the disadvantages of MLIs, researchers are continuously contributing to new generation topologies under the name of reduced switch count (RSC) MLIs. From the past decade, numerous RSC-MLIs topologies have been reported for various applications. Therefore, this paper presents a comprehensive review and classification of RSC-MLI topologies, in terms of their structure, features, limitations, suitability and selection for specific applications.

中文翻译：

---

减少开关数量的多电平逆变器的研究

高效，经济高效的电源转换器是现代电源应用的先决条件。随着成熟的中功率自换向开关设备的发展，多电平逆变器（MLI）出现了，成为大功率中压应用的有希望的解决方案。尽管，MLI在工业应用中发挥着令人鼓舞的作用，但它们的高设备数量，尺寸，成本和控制复杂性限制了其市场渗透率。为了解决MLI的缺点，研究人员以减少开关数量（RSC）MLI的名义不断为新一代拓扑做出贡献。在过去的十年中，已经报道了许多用于各种应用的RSC-MLI拓扑。因此，本文就RSC-MLI拓扑的结构，特征，