A new PSS design using gain scheduling and anti-windup control theories

The conventional PSS (power system stabilizer) is generally designed for being effective for a linearized model at a certain operating point. In the power system, when the state of the system configuration and power flow change, the performance and stability of PSS are not guaranteed theoretically. In this paper, we propose a design method of generator control using the gain scheduling theory which has the robustness for different operating points. Moreover we add an anti-windup control with the state observer. As a result we can expect the improvement of control performance. The validity of the proposed method is demonstrated using a 3 machine 9 bus system.