Common DC-Link Multilevel Converters: Topologies, Control and Industrial Applications

Multilevel converters (MLCs) are widely recognized for their exceptional benefits and have emerged as the preferred choice medium- high-power/voltage applications. Their usage has also been extended to low-power applications overcome issues associated with high switching frequencies electromagnetic interference (EMI) commonly encountered in two-level converters. Common dc-link MLCs received particular attention industry due ability eliminate need bulky inefficient transformers rectifiers, making them a compelling option different applications, primarily such wind turbine (WT) power conversion systems. Furthermore, common topologies required back-to-back (BTB) configurations, they facilitate use of shared between rectification inversion stages. Despite popularity, there is currently no comprehensive review article dedicated topologies. This paper addresses this gap by presenting MLCs, covering topological evolution, features, comparison, modulation techniques, control strategies, industrial application areas. Additionally, future perspectives recommendations discussed provide researchers engineers better understanding potential advantages these