Damping representation for power system stability studies

The paper includes a review and summary of the actual damping in electric p ower systems and the methods for modeling such damping in the various compu ter programs used to study power system stability. It is concluded that gre at care is required in both software development and program application to avoid serious errors in the study of power system stability. Judgment is o ften required for reasonable modeling of damping. Recommendations are provi ded to guide the power system stability practitioner, and research activiti es are recommended.