Robust PSS tuning through multiobjective optimization

This paper presents a technique for PSS design which is based on multiobjective optimization. The technique has the ability to tune multiple PSS controllers by simultaneously enhancing the damping based performance index and robustness index specified via the /spl par/H/spl par//sub /spl infin// norm of the system. To illustrate the proposed design technique two case studies are presented, including a two-area benchmark system and a fifty-machine test system. To allow the proposed tools to be applied for PSS control design, the authors developed a MATLAB interface to the microGA optimization solver.