一种具有工频展开的三相三电平隔离型DC-AC变换器

A three-level three-phase single-stage high-frequency link dc-ac converter is reported in this article for grid integration of photovoltaic sources. The proposed topology employs two three-level neutral point clamp (NPC) half-bridge legs on the dc side. The advantages of using three-level legs over conventional two level are: 1) the three-level legs can be implemented with the devices with lower b...