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Asymptotic rejection of sinusoidal disturbances based voltage balance control in back-to-back power converters

Opened Access Asymptotic rejection of sinusoidal disturbances based voltage balance control in back-to-back power converters

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Autor: Umbría, F.
Gordillo, F.
Salas, F.
Aracil, J.
Gómez‐Estern, F.
Departamento: Universidad de Sevilla. Departamento de Ingeniería de Sistemas y Automática
Fecha: 2014
Publicado en: International Journal of Robust and Nonlinear Control, 24(17), 2974-2994
Tipo de documento: Artículo
Resumen: This paper addresses the imbalance problem of the dc-link capacitor voltages in the three-level diode-clamped back-to-back power converter. In order to cope with it, a mathematical analysis of the capacitor voltage difference dynamics, based on a continuous model of the converter, is first carried out. It leads to an approximated model which contains explicitly several sinusoidal functions of time. In view of this result, the voltage imbalance phenomenon can be addressed as an output regulation problem, considering the sinusoidal functions as exogenous disturbances. Thus, a novel approach to deal with the mentioned problem in the back- to-back converter is presented. Then, the particular features of the disturbances are used to design several controllers. They all follow an asymptotic disturbance rejection approach. In this way, the estimations of the disturbances are used to apply a control law that cancels them while regulating the capacitor voltage balance as well. Finally, the pe...
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Tamaño: 469.5Kb
Formato: PDF

URI: http://hdl.handle.net/11441/23379

DOI: http://dx.doi.org/10.1002/rnc.3036

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