Consideration about on-line parameters estimation of an induction generator model

The paper presents an analysis concerning the evolution of the parameter estimates of a linearized model describing an induction generator connected to a power system. The performed studies consider the parameters estimation for two main cases: the induction generator operates in open-loop, respectively the induction generator operates in closed loop, under constrain of a controller (being embedded into a control system). The studies show a different shape-pattern of parameter estimates for the two considered cases, revealing a strong dependence by the variance level of disturbing noise. Therefore, especially in the case of an open-loop operating regime, a high variance of the stochastic noise can quickly leads the parameters estimator towards numerical instability.