Robust tuning of power system stabilizers in multimachine power systems

This paper demonstrates the robust tuning of power systems stabilizers for power systems, operating at different loading conditions. A classical lead- lag power system stabilizer is used to demonstrate the technique, The probl em of selecting the stabilizer parameters is converted to a simple optimiza tion problem with an eigenvalue-based objective function, which is solved b y a tabu search algorithm. The objective function allows the selection of t he stabilizer parameters to optimally place the closed-loop eigenvalues in the left-hand side of a vertical line in the complex a-plane, The effective ness of the stabilizers tuned using the suggested technique, in enhancing t he stability of power systems, is confirmed through eigenvalue analysis and simulation results.