Control para el voltaje de salida de un inversor multinivel de capacitores flotantes

Contenido principal del artículo

Beatriz Angélica Aguilar-López http://orcid.org/0000-0002-2769-4992
José Antonio Juárez-Abad http://orcid.org/0000-0001-7440-0849
Jorge Luis Barahona-Avalos https://orcid.org/0000-0002-5502-6692
Rosalino Mayoral-Lagunes http://orcid.org/0000-0003-3420-7416
Jesús Linares-Flores http://orcid.org/0000-0002-5723-4786
Marco Antonio Contreras-Ordaz http://orcid.org/0000-0002-3478-796X

Keywords

balanceo natural, capacitores flotantes, control robusto, convertidor de potencia, linealización exacta, rechazo activo de perturbaciones

Resumen

Este artículo presenta el diseño de un controlador mediante la técnica de rechazo activo de perturbaciones para el seguimiento de la trayectoria de referencia para el voltaje de salida de un inversor multinivel de capacitores flotantes. Si en el modelo dinámico del convertidor se consideran las dinámicas de cada capacitor flotante y adicionalmente, las de los elementos pasivos del filtro de salida, el modelo resultante es de un orden alto, lo que dificulta su control. En este trabajo se emplea la modulación PS-PWM para mantener los voltajes en los capacitores flotantes en sus valores nominales y de esta manera poder generar un modelo dinámico simple, que resulta ser más fácil de controlar. Los resultados de simulación y experimentales, confirman que el controlador es robusto a perturbaciones provocadas por cambios en la carga, sin importar si son de tipo lineal o no lineal. Se realizó la construcción del prototipo experimental del sistema y se implementó el controlador y modulador en un FPGA y en la parte final se muestran los resultados obtenidos.
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Citas

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