Design of passivity-based output feedback controllers for power system stabilization

This paper develops a method for designing passivity-based output feedback controllers for complex nonlinear systems that are not inherently passive. Using this methodology, three power system stabilizers are designed; two of these are output feedback sliding mode controllers and the third is designed using basic passivity principles. The controllers are examined to see how well they handle model uncertainty, disturbances and measurement noise. The results are compared to a previous study (1996) performed on the same benchmark power system model using six standard controllers. It was found that two of the new controllers designed in this paper outperformed the best of the controllers in the previous study