Three-phase three-level one-cycle controlled bidirectional AC-to-DC NPC converter

Three‐phase three‐level one‐cycle controlled bidirectional ac–dc neutral‐point‐clamped converter without having voltage sensors

“…It can be seen from (20) that if ( R S V DC /2 R F v m ) < 1, the converter operates in the rectifying mode, and if ( R S V DC /2 R F v m ) > 1, the converter will operate in the inverting mode. It can be noted from (20) that the steady‐state phasor model of an OCC‐based 3 L‐NPC bidirectional ac–dc converter remains the same as that of an OCC‐based two‐level bidirectional ac–dc converter in [21].…”

“…To comprehensively exploit the advantages offered by OCC and also to achieve bidirectional power flow, a one‐cycle controlled led 3 L‐NPC converter which requires sensing of the instantaneous source voltages is first presented in this paper. An initial effort in this regard has been reported by the authors in [21]. Subsequently, a modified version of the aforementioned OCC‐based bidirectional 3 L‐NPC converter which does not require sensing of the instantaneous phase voltages is proposed.…”