Application of active identification method to synchronous generator parameter estimation

Active identification procedure uses the control input to actively drive the system state to points in the state space that allow the orthogonalized projection estimator to acquire all the necessary information about the unknown parameters in a finite time interval, whose maximum length can be computed. Therefore it is most suitable for online applications. The main feature of active identification procedure is that the study system should be transformed into an output-feedback form, in which the nonlinearities depend only on the measured output. To apply such a procedure to estimate the parameters of a synchronous generator, first, a third order nonlinear model with saturation is transformed to an output feedback form. Then the identification method is modified and applied to estimate the unknown parameters. The simulation results show very good accuracy of the estimated parameters