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Título:	DC-link voltage oscilations reduction during unbalanced grid faults for high power wind turbines
Autor/a:	Miranda, Hernan; Teodorescu, Remus; Rodríguez Cortés, Pedro; Helle, L.
Otros autores:	Universitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica; Universitat Politècnica de Catalunya. SEER - Sistemes Elèctrics d'Energia Renovable
Abstract:	During unbalanced grid voltage faults the Power injected to the grid experiences 100Hz oscillations as a result of interactions between positive and negative sequence components of three-phase voltages and currents. These oscillations can become as high as %50 percent of the rated power. In this article an improved controller is proposed which present different behavior during normal operation and faults to keep track of non-sinusoidal current reference signals. The reference signals are calculated to obtain zero power oscillations. Reconfigurable resonant controllers are used for this purpose applied to 3-level Neutral-point-clamped converter in the megawatt range.
Abstract:	Peer Reviewed
Materia(s):	-Àrees temàtiques de la UPC::Energies::Energia elèctrica::Automatització i control de l'energia elèctrica -Àrees temàtiques de la UPC::Energies::Energia eòlica::Aerogeneradors -Electric power system stability -Wind turbines -Xarxes elèctriques -- Estabilitat -Aerogeneradors
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Tipo de documento:	Artículo - Versión publicada Objeto de conferencia
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