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Analytical derivation of the DC-side input admittance of the direct-voltage controlled modular multilevel converter
KTH, School of Electrical Engineering and Computer Science (EECS), Electric Power and Energy Systems.ORCID iD: 0000-0002-3107-7073
2017 (English)In: IET Generation, Transmission & Distribution, ISSN 1751-8687, E-ISSN 1751-8695, Vol. 11, no 16, p. 4018-4030Article in journal (Refereed) Published
Abstract [en]

The input admittance of a converter, connected to other dynamic subsystems, is a useful tool to investigate whether poorly damped oscillations or even unstable conditions might occur at certain frequencies. This is of interest in applications employing the modular multilevel converter (MMC), where the internal dynamics of the converter and the increased number of control loops greatly affect the MMC's dynamic behaviour, compared to other types of converters. In this study, the dc-side input admittance of the direct-voltage controlled MMC is derived analytically and verified via small-signal perturbation in a detailed non-linear time-domain simulation model. The MMC's input admittance is parametrically studied and compared to the dc-side input admittance of an equivalent two-level converter.

Place, publisher, year, edition, pages
INST ENGINEERING TECHNOLOGY-IET , 2017. Vol. 11, no 16, p. 4018-4030
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:kth:diva-220845DOI: 10.1049/iet-gtd.2017.0278ISI: 000418414200016Scopus ID: 2-s2.0-85034947239OAI: oai:DiVA.org:kth-220845DiVA, id: diva2:1172920
Note

QC 20180111

Available from: 2018-01-11 Created: 2018-01-11 Last updated: 2018-01-11Bibliographically approved

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Harnefors, Lennart

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