The paper demonstrates the use of genetic algorithms to designoutput feedback power system stabilizers. Two methods are presented: inthe first method, the problem is formulated as an optimization problemwith a standard infinite time quadratic objective function. A digitalsimulation of the power system is then used in conjunction with thegenetic algorithm to determine the output feedback gains. In the secondmethod, the problem of selecting the output feedback gains is convertedto a simple optimization problem with an eigenvalue based objectivefunction, which is solved by a genetic algorithm. The design method doesnot need the specification of weighting matrices. Various objectivefunctions are presented allowing the selection of the output feedbackgains to place the closed loop eigenvalues in the left hand side of avertical line in the complex s plane, within an open sector in thecomplex s plane, or within a vertical strip in the complex s plane. Theeffectiveness of the output feedback stabilizer in enhancing the dynamicstability of power systems is verified through eigenvalue analysis andsimulation results
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