Comparative Analysis of Hybrid NPP and NPC Seven-Level Inverter With Switched-Capacitor

In this work, the general structure of a hybrid NPP/NPC seven-level inverter is derived from dual-T-type inverter. Compared with original structure, more flexible as there are four specific circuit configurations to meet different applications. addition self-balanced capacitor voltages and boost capability, various commercial NPP NPC modules can be used speed up design process. Circuit description, operation principle, modulation simulation results analyzed comparatively. Theoretical analysis comparison indicate that have their own merits demerits. Especially, except for bidirectional switch, all switching components + configuration same voltage stress dc input making it better in aspect component selection, suitable high The performance experimentally demonstrated by an 1kW prototype its efficiency closed 96%.