Modeling and analysis of Roseirs Excitation System

Abstract

In this research a non-linear model for the static excitation system of Rosiers Hydro Powered generators has been developed using MATLAB/SIMULINK integrated environment, and the response of model analyzed using step signal. To derive the linear model of the static excitation system, closed loop frequency response test was carried out and the response of the system was approximated to a second order representation and the parameters (gain, natural frequency and damping factor) were obtained. The resultant second order approximation was found to behave as integrator, so the linear system reduced to a first order system. Simulation is carried out for the non-linear model to verify the step response and compare it with the existing excitation system in the station.