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dc.contributor.authorTaffese, Abel Assegid
dc.contributor.authorde Jong, Erik
dc.contributor.authorD'Arco, Salvatore
dc.contributor.authorTedeschi, Elisabetta
dc.date.accessioned2019-05-24T12:57:05Z
dc.date.available2019-05-24T12:57:05Z
dc.date.created2019-03-28T12:33:36Z
dc.date.issued2019
dc.identifier.urihttp://hdl.handle.net/11250/2598689
dc.description.abstractThe method used to calculate insertion indexes plays an important role in determining the overall performance of the Modular Multilevel Converter (MMC). Direct voltage control, which is the simplest option, results in a large circulating current ripple because this modulation technique does not account for the arm voltage ripples. This led to the development of compensated modulation techniques that compensate for the arm voltage ripples thereby eliminating the circulating current ripple. There are two variants of compensated modulation: closed-loop and openloop. The closed-loop version requires measurement of the arm voltages without distortion and delay, which is difficult to achieve in practice. The open-loop method overcomes this challenge by using estimated arm voltages. However, accurate knowledge of the system parameters is needed for effective removal of the circulating current ripples. This is a limitation because the parameters change with time and operating conditions. This paper presents a modified version of the open-loop method, which includes a scheme for correcting parameter errors online. The method estimates the parameters, the arm capacitances and time delay, by using feedback controllers acting on the circulating current ripples. Mathematical derivation of the method, together with its validation using simulation and experimental tests, is presented in detail.nb_NO
dc.description.abstractOnline Parameter Adjustment Method for Arm Voltage Estimation of the Modular Multilevel Converternb_NO
dc.language.isoengnb_NO
dc.publisherIEEEnb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleOnline Parameter Adjustment Method for Arm Voltage Estimation of the Modular Multilevel Converternb_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.2019.2907178
dc.identifier.cristin1688522
cristin.unitcode7548,50,0,0
cristin.unitnameEnergisystemer
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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