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dc.contributor.authorFazlin Roslan, Nurul
dc.contributor.authorSuul, Jon Are
dc.contributor.authorRocabert Delgado, Joan
dc.contributor.authorRodríguez Cortés, Pedro
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica
dc.date.accessioned2017-09-14T09:12:53Z
dc.date.issued2017-08-23
dc.identifier.citationFazlin, N., Suul, J., Rocabert, J., Rodriguez, P. A comparative study of methods for estimating virtual flux at the point of common coupling in grid connected voltage source converters with LCL filter. "IEEE transactions on industry applications", 23 Agost 2017, vol. PP, núm. 99, p. 1-26.
dc.identifier.issn0093-9994
dc.identifier.urihttp://hdl.handle.net/2117/107620
dc.description.abstractGrid synchronization based on Virtual Flux (VF) estimation allows for control of grid-connected power converter without depending on AC-voltage measurements. This is useful in voltage-sensor-less applications for reducing cost and complexity of the control hardware, and can be utilized in case of limited reliability or availability of voltage measurements at the intended point of synchronization to the grid. However, for Voltage Source Converters (VSC) with LCL filters, the influence of the capacitor current must be taken into account to ensure accurate VF estimation at the Point of Common Coupling (PCC) with the grid. This paper presents a comparative evaluation of three VF-based methods for grid synchronization of VSCs with LCL filters, with three different ways of obtaining the capacitor current. The VF estimation in the first method is based only on the measured converter currents. The second method includes capacitor voltage measurements used for estimating the capacitor currents, while the capacitor currents are measured in the third approach. Comparative results from time-domain simulations are presented demonstrating good performance of the estimation and accurate control of the active and reactive power at the PCC with all three methods, as long as sufficiently accurate filter parameters and current measurements are available. However, the approach based on capacitor current measurements is sensitive to noise due to the high ripple current compared to the fundamental frequency current in the capacitors. The operation of a converter with VF-based grid synchronization including estimation of the capacitor current is demonstrated by experimental results, verifying the voltage sensor-less operation with LCL-filter.
dc.format.extent26 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria electrònica::Electrònica de potència::Convertidors de corrent elèctric
dc.subjectÀrees temàtiques de la UPC::Enginyeria elèctrica::Distribució d’energia elèctrica::Xarxes elèctriques
dc.subject.lcshElectric current converters
dc.subject.lcshPower electronics
dc.subject.lcshElectric fault location
dc.subject.lcshElectric networks
dc.subject.lcshElectric filters
dc.subject.othervoltage source converter
dc.subject.othervirtual flux estimation
dc.subject.otherproportional resonant current controller
dc.subject.otherLCL-filter
dc.titleA comparative study of methods for estimating virtual flux at the point of common coupling in grid connected voltage source converters with LCL filter
dc.typeArticle
dc.subject.lemacTransformadors elèctrics
dc.subject.lemacConvertidors de corrent elèctric
dc.subject.lemacElectrònica de potència
dc.subject.lemacXarxes elèctriques -- Estabilitat
dc.subject.lemacFiltres elèctrics
dc.contributor.groupUniversitat Politècnica de Catalunya. SEER - Sistemes Elèctrics d'Energia Renovable
dc.identifier.doi10.1109/TIA.2017.2743200
dc.description.peerreviewedPeer Reviewed
dc.rights.accessRestricted access - publisher's policy
drac.iddocument21495338
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/MINECO/1PE/ENE2016-79493-R
dc.date.lift10000-01-01
upcommons.citation.authorFazlin, N., Suul, J., Rocabert, J., Rodriguez, P.
upcommons.citation.publishedtrue
upcommons.citation.publicationNameIEEE transactions on industry applications
upcommons.citation.volumePP
upcommons.citation.number99
upcommons.citation.startingPage1
upcommons.citation.endingPage26


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