Two time scale global dynamical modelling of power electronic systems Original Research Article

Global dynamical models of power electronic systems allow to compute their dynamics in a very easy way as they replace the switching behavior of the power electronic converter by a continuous process [F. Labrique, H. Buyse, G. Seguier, R. Bausiere, Les convertisseurs de l’electronique de puissance—Commande et comportement dynamique, vol. 5, Technique et Documentation, Lavoisier, Paris, France, 1998; H. Buyse, D. Grenier, F. Labrique, S. Gusia, Dynamic modelling of power electronic converters using a describing function like approach, in: Proceedings of the ELECTRIMACS’99 Conference, vol. 1, Lisbon, Portugal, 1999, pp. 7–14]. But they are unable to predict the ripples induced by the switching behavior of the power semiconductor switches. The aim of this paper is to show for power electronic systems using a power electronic converter working in a PWM mode, how it is possible to define a global dynamical model including a dynamical model of the ripple effects.