TY - JOUR
T1 - DC-Link Neutral Point Control for 3L-NPC Converters Utilizing Selective Harmonic Elimination–PWM
AU - Sanchez-Ruiz, Alain
AU - Mazuela, Mikel
AU - Fernandez-Rebolleda, Hector
AU - Ceballos, Salvador
AU - Perez-Basante, Angel
AU - Ibanez-Hidalgo, Irati
AU - Zubiaga, Markel
AU - Pou, Josep
AU - Beniwal, Neha
AU - Konstantinou, Georgios
PY - 2022/9
Y1 - 2022/9
N2 - Selective harmonic elimination-pulsewidth modulation (SHE-PWM) is a modulation technique widely used to improve the efficiency and harmonic content in medium-voltage high-power converters. Among these converters, the three-level neutral-point-clamped (3L-NPC) converter is one of the most utilized topologies. However, the 3L-NPC converter requires a proper balancing of dc-link capacitor voltages. This article presents a control technique, based on pulse shifting method, to regulate the neutral point voltage when SHE-PWM is utilized. The proposed technique performs well with any power factor and it can also be directly applied to T-type converters and easily extrapolated to other multilevel topologies. The proposed method is experimentally validated in a scaled-down power converter and a full-scale medium-voltage 3L-NPC converter. © 2021 IEEE.
AB - Selective harmonic elimination-pulsewidth modulation (SHE-PWM) is a modulation technique widely used to improve the efficiency and harmonic content in medium-voltage high-power converters. Among these converters, the three-level neutral-point-clamped (3L-NPC) converter is one of the most utilized topologies. However, the 3L-NPC converter requires a proper balancing of dc-link capacitor voltages. This article presents a control technique, based on pulse shifting method, to regulate the neutral point voltage when SHE-PWM is utilized. The proposed technique performs well with any power factor and it can also be directly applied to T-type converters and easily extrapolated to other multilevel topologies. The proposed method is experimentally validated in a scaled-down power converter and a full-scale medium-voltage 3L-NPC converter. © 2021 IEEE.
KW - DC-link voltage control
KW - modulation
KW - neutral-point control
KW - neutral-point-clamped (NPC) converter
KW - selective harmonic elimination (SHE)
KW - voltage source converters (VSCS)
UR - http://www.scopus.com/inward/record.url?scp=85115667531&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85115667531&origin=recordpage
U2 - 10.1109/TIE.2021.3113019
DO - 10.1109/TIE.2021.3113019
M3 - RGC 21 - Publication in refereed journal
SN - 0278-0046
VL - 69
SP - 8633
EP - 8644
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 9
ER -