DISEÑO DE CONTROLADOR HÍBRIDO PARA CONVERTIDOR ELEVADOR CUADRÁTICO (HYBRID CONTROLLER DESIGN FOR QUADRATIC BOOST CONVERTER)
Resumen
Dentro de las fuentes de energía renovable de bajo voltaje, las celdas fotovoltaicas requieren convertidores con alta ganancia y estabilidad, la cual se obtiene mediante controladores de voltaje. Además, los avances en procesadores digitales permiten diseñar controladores precisos, aunque en situaciones de alta demanda de procesamiento, los circuitos analógicos ofrecen una alternativa viable. Este artículo propone el diseño de un controlador híbrido que combina controladores analógicos con un microcontrolador para la generación PWM, manipulando las etapas del convertidor seleccionado. Se describen la estrategia de conmutación y el modelo matemático del controlador. Los resultados en simulación muestran que es posible generar una señal PWM con un microcontrolador en función de la acción correctiva del controlador. Además, el voltaje de referencia es alcanzado ante perturbaciones en el voltaje de referencia y corriente de carga.
Palabras Clave: Controlador analógico, Controlador digital, Convertidor de potencia, Microcontrolador.
Abstract
Among low-voltage renewable energy sources, photovoltaic cells require high gain and stability converters, which is achieved through voltage controllers. Furthermore, advancements in digital processors enable the design of precise controllers, although analog circuits offer a viable alternative in situations with high processing demand. This paper proposes the design of a hybrid controller that combines analog controllers with a microcontroller for PWM generation, handling the stages of the selected converter. The switching strategy and the mathematical model of the controller are described. Simulation results show that it is possible to generate a PWM signal with a microcontroller based on the corrective action of the controller. The reference voltage is also reached despite disturbances in the reference voltage and load current.
Keywords: Analog controller, Digital controller, Microcontroller, Power converter.
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