Enhancing the Natural Voltage Balancing Capability of Neutral-Point-Clamped Converters under Carrier-Based Pulsewidth Modulation

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dc.contributor.authorBeniwal, Neha
dc.contributor.authorPou, Josep
dc.contributor.authorTownsend, Christopher D.
dc.contributor.authorCeballos, Salvador
dc.contributor.institutionPOWER ELECTRONICS AND SYSTEM EQUIPMENT
dc.date.accessioned2024-07-24T11:48:51Z
dc.date.available2024-07-24T11:48:51Z
dc.date.issued2018-07-02
dc.descriptionPublisher Copyright: © 2018 IEEE.
dc.description.abstractIn this paper, a new modulation technique is presented which aims to enhance the natural voltage balancing capability of neutral-point-clamped converters. The traditional carrier-based pulsewidth modulation technique with zero-sequence injection faces some drawbacks, namely, its inability to balance initial capacitor voltage imbalances quickly and the divergence of the capacitor voltages in the presence of nonlinear loads with even harmonics. This paper aims to find a trade-off between voltage balance performance and switching losses by reducing the difference between the average capacitor voltages without incorporating any external circuitry. A reference neutral-point (NP) current is generated using the average difference between the capacitor voltages. Depending on the reference NP current and predicted NP current, appropriate duty cycles are applied to switch the three phases. These duty cycles are directly linked to the voltage unbalance between the capacitor voltages and thus provides the necessary 'push' to mitigate deviations in natural balancing characteristics. To validate the proposed modulation technique, simulation results are presented for linear loads as well as for nonlinear loads with even harmonics.en
dc.description.sponsorshipACKNOWLEDGMENT This work has been supported by the Basque Government within the Research program ELKARTEK under the project ENSOL (KK-2018/00040).
dc.description.statusPeer reviewed
dc.identifier.citationBeniwal , N , Pou , J , Townsend , C D & Ceballos , S 2018 , Enhancing the Natural Voltage Balancing Capability of Neutral-Point-Clamped Converters under Carrier-Based Pulsewidth Modulation . in 2018 IEEE 4th Southern Power Electronics Conference, SPEC 2018 . , 8635951 , 2018 IEEE 4th Southern Power Electronics Conference, SPEC 2018 , Institute of Electrical and Electronics Engineers Inc. , 4th IEEE Southern Power Electronics Conference, SPEC 2018 , Singapore , Singapore , 10/12/18 . https://doi.org/10.1109/SPEC.2018.8635951
dc.identifier.citationconference
dc.identifier.doi10.1109/SPEC.2018.8635951
dc.identifier.isbn9781538682579
dc.identifier.urihttps://hdl.handle.net/11556/1812
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=85062887951&partnerID=8YFLogxK
dc.language.isoeng
dc.publisherInstitute of Electrical and Electronics Engineers Inc.
dc.relation.ispartof2018 IEEE 4th Southern Power Electronics Conference, SPEC 2018
dc.relation.ispartofseries2018 IEEE 4th Southern Power Electronics Conference, SPEC 2018
dc.relation.projectIDEusko Jaurlaritza, KK-2018/00040
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subject.keywordsCarrier-based pulsewidth modulation
dc.subject.keywordsmoving average filter
dc.subject.keywordsnatural balancing
dc.subject.keywordsneutral-point-clamped converter
dc.subject.keywordsthree-level modulation
dc.subject.keywordsEnergy Engineering and Power Technology
dc.subject.keywordsElectrical and Electronic Engineering
dc.titleEnhancing the Natural Voltage Balancing Capability of Neutral-Point-Clamped Converters under Carrier-Based Pulsewidth Modulationen
dc.typeconference output
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