Trajectory sensitivity based identification of synchronous generator and excitation system parameters

The authors describe the application of a trajectory sensitivity method to the identification of synchronous generator reactances and excitation system time constants. The evaluation of the identification method is performed using different types of disturbances in a single-synchronous-generator, single-line-to-infinite-bus power system. This generator is modeled in great detail to provide an accurate reference model. The robustness and performance of the method are tested by identifying the d and q-axis reactances of a less detailed synchronous machine model. The performance of the identification method is evaluated by comparing time responses and transfer functions of the reference and the identified models using different types of faults