A vector control strategy to eliminate active power oscillations in four-leg grid-connected converters under unbalanced voltages

dc.creatorMora Castro, Andrés Felipe
dc.creatorCárdenas Dobson, Jesús Roberto Pedro Alejandro
dc.creatorUrrutia O., Matías
dc.creatorEspinoza Bolaños, Mauricio
dc.creatorDíaz Díaz, Matías
dc.date.accessioned2024-10-30T19:19:24Z
dc.date.available2024-10-30T19:19:24Z
dc.date.issued2020-06
dc.description.abstractThe problems associated with active power oscillations (APOs) in grid-connected converters are well-known. Imbalances in the grid usually produce double-frequency oscillations in the dc-link voltage and current which could reduce the useful life of solar panels, batteries, and capacitors connected to this point. Moreover, as reported in the literature, double-frequency reactive power oscillations (RPOs) also produce adverse effects in distribution systems, and it is desirable to eliminate or mitigate them. When a four-leg power converter is connected to an unbalanced grid, the zero-sequence current provides extra degrees of freedom to compensate or even eliminate the power oscillations at the converter dc-link side. In this paper, a new methodology to regulate these double-frequency power components is proposed. It is based on a closed-loop vector control approach, where the active power oscillations (APOs) at converter side are transformed into a synchronous frame rotating at twice the grid frequency and regulated using the zero-sequence current. To avoid overcurrent produced by the circulation of positive-, negative-, and zero-sequence components a current limiter is also proposed in this paper. Experimental results obtained with a 4-kW four-leg power converter prototype are presented and discussed in this paper.
dc.description.procedenceUCR::Vicerrectoría de Docencia::Ingeniería::Facultad de Ingeniería::Escuela de Ingeniería Eléctrica
dc.description.sponsorshipFondo Nacional de Desarrollo Científico y Tecnológico/[1180879]/Fondecyt/Chile
dc.description.sponsorshipCentro Avanzado de Ingeniería Eléctrica y Electrónica/[FB0008]/AC3E/Chile
dc.description.sponsorshipComisión Nacional de Investigación Científica y Tecnológica-Programa Formación de Capital Humano Avanzado/[2013-21130042]/CONICYT-PCHA/Chile
dc.identifier.citationhttps://ieeexplore.ieee.org/abstract/document/8732350
dc.identifier.doi10.1109/JESTPE.2019.2921536
dc.identifier.issn2168-6777
dc.identifier.issn2168-6785
dc.identifier.urihttps://hdl.handle.net/10669/100005
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.sourceIEEE Journal of Emerging and Selected Topics in Power Electronics, 8(2), 1728-1738
dc.subjectDC–AC converters
dc.subjectdistribution system
dc.subjectsymmetrical components
dc.subjectReactive power
dc.subjectDC-AC power converters
dc.subjectPower distribution
dc.subjectPower control
dc.titleA vector control strategy to eliminate active power oscillations in four-leg grid-connected converters under unbalanced voltages
dc.typeartículo original

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