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Control strategies based on symmetrical components for grid-connected converters under voltage dips
Alepuz Menéndez, Salvador; Busquets Monge, Sergio; Bordonau Farrerons, José; Martínez Velasco, Juan Antonio; Silva, César A.; Pontt, Jorge; Rodríguez, José
Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. Departament d'Enginyeria Elèctrica; Universitat Politècnica de Catalunya. GREP - Grup de Recerca en Electrònica de Potència
Low-voltage ride-through (LVRT) requirements demand wind-power plants to remain connected to the network in presence of grid-voltage dips. Most dips present positive-, negative-, and zero-sequence components. Hence, regulators based on symmetrical components are well suited to control gridconnected converters. A neutral-point-clamped topology has been considered as an active front end of a distributed power-generation system, following the trend of increasing power and voltage levels in wind-power systems. Three different current controllers based on symmetrical components and linear quadratic regulator have been considered. The performance of each controller is evaluated on LVRT requirement fulfillment, grid-current balancing, maximum grid-current value control, and oscillating power flow. Simulation and experimental results show that all three controllers meet LVRT requirements, although different system performance is found for each control approach. Therefore, controller selection depends on the system constraints and the type of preferred performance features.
Peer Reviewed
Àrees temàtiques de la UPC::Energies::Energia eòlica::Centrals eòliques
Àrees temàtiques de la UPC::Enginyeria electrònica::Electrònica de potència
Wind power -- Research
Distributed power generation
Grid interface
Multilevel conversion
Energia eòlica -- Conversió
info:eu-repo/semantics/publishedVersion
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