Reinjection concept: A new option for large power and high-quality AC-DC conversion

A new concept referred to as reinjection AC/DC conversion is described, applicable to both self- commutating voltage source and current source conversions. It combines all the benefits of the multi-level, soft switching and ripple reinjection concepts. The aim is to achieve high-quality waveforms, simplify the structural configuration and the interface with the grid, improve the conversion efficiency, limit the dv/dt and provide flexible active and reactive power controllability.