Sintonización del controlador en cascada PI-STA para aplicaciones de filtros activos de potencia
DOI:
https://doi.org/10.4995/riai.2020.12403Palabras clave:
Filtros activos, inversores, electrónica de potencia, control en cascada, control en modos deslizantes, calidad de la energíaResumen
Típicamente el esquema de control de un filtro activo de potencia corresponde a un controlador en cascada, el cual consta de un lazo externo para la regulación del voltaje de cd y un lazo interno para el seguimiento de una corriente de referencia. Cada uno de estos lazos de control está asociado a un controlador que permite converger rápidamente a su respectiva referencia. Este trabajo emplea un controlador PI en el lazo externo y el algoritmo Super-Twisting (STA) en el lazo interno, los cuales conforman al controlador en cascada denotado como PI-STA. Este artículo presenta una metodología para sintonizar los controladores PI y STA, donde el primero se sintoniza a partir de la respuesta al escalón, mientras el STA se sintoniza a partir de considerar la similitud de su estructura con respecto a la de un PI, facilitando así la obtención de las ganancias del STA. Para validar la metodología de sintonización, se presentan resultados en simulación y experimentales.Descargas
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