ESTRATEGÍA DE CONTROL MEDIANTE FUNCIÓN DE LYAPUNOV PARA CONVERTIDORES MONOFÁSICOS CD/CA EN SISTEMAS FOTOVILTAICOS (CONTROL STRATEGY BY LYAPUNOV FUNCTION FOR SINGLE-PHASE CD/CA CONVERTERS IN PHOTOVOLTAIC SYSTEMS)

Resumen Los convertidores CD/CA se utilizan ampliamente en sistemas de generacion fotovoltaica conectados a la red. Normalmente se utilizan solo para inyectar potencia activa a la red, sin embargo, es posible integrar la funcion del filtro activo de potencia al mismo sistema, y entonces es posible eliminar los armonicos de corriente generados por cargas no lineales. El convertidor CD/CA tendra esta capacidad de eliminar las corrientes armonicas mientras tambien inyecta potencia activa en la red, debido a la energia generada por los paneles solares. Este documento presenta una estrategia de control basada en una funcion de Lyapunov para un convertidor CD/CA monofasico para sistemas fotovoltaicas que considera la compensacion armonica. Se presenta el analisis, diseno y los resultados de simulacion. Palabras Clave: Control por funcion Lyapunov, Filtro Activo de Potencia, Fotovoltaico, Fuente Renovable. Abstract The DC/AC Converters are being widely used in grid-connected photovoltaic generation systems. Usually they are used only to inject active power to the grid, however, it is possible to integrate the function of the active power filter to the same system, and then to eliminate the current harmonics generated by non-linear loads. So that the DC/AC converter will have the capacity to eliminate the harmonic currents generated by the nonlinear load while it is able to inject active power into the grid generated by the photovoltaic systems. This paper presents a control strategy based on Lyapunov-function for a single-phase DC/AC converter for photovoltaic systems that considers the harmonic compensation. The analysis, design, and simulations results are presented. Keywords : Active Power Filter, Lyapunov-Function Control, Photovoltaic, Renewable Source.