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DC-link voltage oscilations reduction during unbalanced grid faults for high power wind turbines
Miranda, Hernan; Teodorescu, Remus; Rodríguez Cortés, Pedro; Helle, L.
Universitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica; Universitat Politècnica de Catalunya. SEER - Sistemes Elèctrics d'Energia Renovable
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.
Peer Reviewed
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

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