Optimised harmonic elimination modulation extended to four-leg neutral-point-clamped inverter

Uninterruptible power supply (UPS) is the promising candidate to ensure high quality of delivering power from renewable energy resources to the AC loads especially sensitive and critical ones. In this study, optimised harmonic elimination modulation technique is extended to four-leg neutral-point-clamped (NPC) with neutral point voltage balancing and it has been experimentally validated. It is dem...