Power system stabilizer design via structurally constrained optimal control

This paper proposes an integrated method for power system stabilizer design applicable to multimachine systems. The parameters of all stabilizers are jointly determined, so that the dynamic interactions among the system machines are properly taken into account during the design procedure. By imposing output feedback and decentralization as structural constraints on the control problem, the method provides results which are in full agreement with PSS topologies usually employed in practice. Also, it allows the design of stabilizers derived from speed, electric power, AC bus frequency, etc., or dynamical combinations of these signals. To assess the performance of the proposed method, both numerical and simulation results of its application to two distinct power systems are presented.