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Títol: Parallel-connected legs in a grid-tied inverter system for distributed generation
Autor: Capellá Frau, Gabriel José
Pou Félix, Josep
Zaragoza Bertomeu, Jordi
Ceballos Recio, Salvador
Gabiola, Igor
Robles Sestafe, Eider
Altres autors/autores: Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. TIEG - Grup d'Electrònica Industrial Terrassa
Matèries: Àrees temàtiques de la UPC::Enginyeria electrònica i telecomunicacions::Electrònica de potència
Modulation (Electronics)
Electric current converters
Modulació (Electrònica)
Convertidors de corrent elèctric
Distributed generation of electric power
Tipus de document: Conference lecture
Descripció: Grid-connected high-power inverters are often used in distributed generation and power quality systems. Those inverters have to handle high currents in order to achieve high power values without resorting to higher voltages. Connecting inverter legs in parallel is a proper way to achieve such high currents. Such parallel connection is made by means of inductors and achieving balanced currents among the legs becomes a critical issue. Circulating currents may produce additional losses and stress to the converter’s power devices. Therefore, they should be controlled and minimized. An efficient technique to achieve such balance is presented in this paper. The proposed strategy has been developed on a gridconnected three-phase system. Each phase of the inverter is made up of three legs in parallel. Besides, the control implemented in this work allows full regulation of the power factor. This way, any desired power factor value can be achieved in order to meet grid-connection requirements. Simulation and experimental results are shown in this paper.
Peer Reviewed
Postprint (published version)
Altres identificadors i accés: Capella, G. [et al.]. Parallel-connected legs in a grid-tied inverter system for distributed generation. A: International Conference on Renewable Energies and Power Quality (ICREPQ). "ICREPQ 2011". Las Palmas de Gran Canaria: 2011, p. 1-6.
Disponible al dipòsit:E-prints UPC

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