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Title
DC-Link Neutral Point Control for 3L-NPC Converters Utilizing Selective Harmonic Elimination PWMAuthor
Author (from another institution)
xmlui.dri2xhtml.METS-1.0.item-contributorOtherinstitution
https://ror.org/002xeeh02https://ror.org/002xeeh02
https://ror.org/02fv8hj62
https://ror.org/02fv8hj62
https://ror.org/04gnjpq42
https://ror.org/03r8z3t63
Version
http://purl.org/coar/version/c_ab4af688f83e57aa
Rights
© 2021 IEEEAccess
http://purl.org/coar/access_right/c_abf2Publisher’s version
https://doi.org/10.1109/TIE.2021.3113019Published at
IEEE Transactions on Industrial Electronics Vol. 69. N. 9. Pp. 8633-8644, 2021xmlui.dri2xhtml.METS-1.0.item-publicationfirstpage
8633xmlui.dri2xhtml.METS-1.0.item-publicationlastpage
8644Publisher
IEEEKeywords
Voltage control
Modulation
Harmonic analysis
Topology ... [+]
Modulation
Harmonic analysis
Topology ... [+]
Voltage control
Modulation
Harmonic analysis
Topology
Switches
Capacitors
Reactive power [-]
Modulation
Harmonic analysis
Topology
Switches
Capacitors
Reactive power [-]
Abstract
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 ... [+]
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. [-]
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