Robust tuning of power system stabilizers using QFT

This paper presents a new method for tuning the parameters of a conventiona l power system stabilizer. The region of acceptable performance for the sta bilizer has been extended and covers a wider range of operating and system conditions, The parametric uncertainty in power systems has been handled us ing quantitative feedback theory (QFT), The required controller parameters are arrived at by solving an optimization problem that incorporates the con trol specifications. The robustness of the feedback controller has been inv estigated on a single machine infinite bus model and the results are shown to be consistent with the expected performance of the stabilizer.