CONTROLADOR DE TENSIÓN Y CORRIENTE EN BUS DE CD DE UN CONVERTIDOR BACK-TO-BACK POR EL LADO DE LA RED PARA UN SISTEMA DE GENERACIÓN EÓLICA (VOLTAGE AND CURRENT ON THE GRID SIDE FOR THE DC BUS OF A BACK TO BACK CONVERTER FOR A WIND GENERATION SYSTEM)

Francisco Emilio Rodarte Gutiérrez, Jaime José Rodríguez Rivas, Oscar Carranza Castillo, Rubén Ortega González

Resumen


El convertidor del tipo back-to-back se utiliza para transferir energía en ambas direcciones de acuerdo a lo requerido por un esquema de generación eólica basado en un generador de inducción doblemente alimentado. En su operación, la mitad de este convertidor que corresponde al inversor del lado de la red se encarga de controlar la tensión en el bus de CD. En este trabajo se presenta una estructura de control para esta sección del convertidor que controla la corriente inyectada o demandada a la red y la tensión en el Bus de CD. La estructura de control propuesta permite que se opere en modo rectificador activo y como inversor con inyección de potencia a la red, según lo requieran los lazos de control para mantener la tensión constante del Bus de CD. Para la verificación de esta propuesta se presentan resultados de simulación.

The back to back converter is used to transfer energy in both directions from one section to another according to the requirements of a wind energy generation system, based in a Doubly Fed Induction Generator, for its operation one half of the converter, which is the inverter on the grid side handles the control of the voltage in the DC link, which is also the part connected to the grid. The proposed control structure allows the operation as an active rectifier or as an inverter injecting power to the grid, according to the command of the external voltage loop. The proposed structure was verified with simulation results were the transition from an active rectifier to inverter was tested by changing the direction of the current at the DC link. Simulation results were presented in order to verify this proposal.


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