Power system stabilization via adaptive fuzzy-logic control

A power system stabilizer that combines the merits of fuzzy logic and adaptive control is proposed. The stabilizer is essentially a direct adaptive controller. The controller inputs are the speed and generated-power deviations. The control output is a feedback signal which is a weighted sum of fuzzy bases. The weights are obtained using a projection algorithm. The design steps of the proposed stabilizer are explained. Simulation results illustrate the effect of the controller tuning-parameters and compare the adaptive fuzzy-logic stabilizer with the conventional power system stabilizer. The superiority of the proposed stabilizer is evident.