Identification of power system models for large scale damping control

The a priori models used to plan large electrical power systems are often inadequate for the development of robust large-scale damping controls. Methods that are used at the Bonneville Power Administration to construct measurement-based models of the controlled plant and the source noise are presented. The identification procedures include frequency-domain fitting of structured rational-block models and time-domain fitting with an extended version of Prony's method. Comparative results are shown for a recent test of the western North American power system.<>