SYNCHRONOUS GENERATOR STABILIZER DESIGN THROUGH INCOMPLETE STATE-FEEDBACK

It is well known that there is more flexibility offered by state feedb ack in multivariable systems beyond closed-loop eigenvalue assignment. However, it is difficult to use only measurable state variables in si ngle-input control systems to assign some closed-loop system poles and also achieve some kind of optimality, for example, the sum of squared errors under a step-input is minimized. An algorithm is developed in this paper to solve this problem, this algorithm is applied to the syn chronous generator stabilizer design problem to present a new method. In this new stabilizer design method, only measurable state variables are used to relocate a pair of conjugate system poles corresponding to the electro-mechanical oscillation mode in the power system; and to m inimize, subject to physical limits, the sum of squared machine speed- diversions under a step disturbance.