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dc.contributor.authorBergna-Diaz, Gilbert
dc.contributor.authorSuul, Jon Are Wold
dc.contributor.authorD'Arco, Salvatore
dc.date.accessioned2018-01-08T15:31:43Z
dc.date.available2018-01-08T15:31:43Z
dc.date.created2017-09-26T08:52:04Z
dc.date.issued2017
dc.identifier.issn0885-8993
dc.identifier.urihttp://hdl.handle.net/11250/2476308
dc.description.abstractThe internal currents and voltages of Modular Multilevel Converters (MMCs) contain multiple frequency components in steady state operation and remain time-periodic even when transformed into a synchronously rotating reference frame. This prevents a straightforward state-space representation where a constant equilibrium point is reached and all state variables converge to constant values under steady-state conditions. Such steady-state time-invariant (SSTI) representations, generally obtained by Park's transformation as commonly applied in vector-oriented control of power converters, are needed for linearization and eigenvalue-based analysis of small-signal stability. This paper presents an energy-based model of an MMC with a modulation strategy where the insertion indices are compensated for the oscillations in the sum arm voltage. The formulation of the model allows for deriving, by the application of Park transformations at three different frequencies, a SSTI representation that accurately captures the internal dynamics of the MMC. This model can be simplified to a reduced order model that maintains accurate reproduction of the external behavior at the ac- and dc-sides while neglecting some of the internal dynamics. The validity and accuracy of these two SSTI MMC models are verified by time-domain simulations and their utilization for eigenvalue-based analysis of MMC dynamics is demonstrated by examples. OAPAnb_NO
dc.language.isoengnb_NO
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)nb_NO
dc.titleEnergy-Based State-Space Representation of Modular Multilevel Converters with a Constant Equilibrium Point in Steady-State Operationnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.journalIEEE transactions on power electronicsnb_NO
dc.identifier.doi10.1109/TPEL.2017.2727496
dc.identifier.cristin1498036
dc.relation.projectNorges forskningsråd: 215942nb_NO
dc.description.localcode© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.nb_NO
cristin.unitcode194,63,20,0
cristin.unitnameInstitutt for elkraftteknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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