IEEE Power Engineering Society

IEEE
Recommended Practice for
Excitation System Models for
Power System Stability Studies
Sponsor
Energy Development and Power Generation Committee
of the
IEEE Power Engineering Society
Approved 29 December 2005
American National Standards Institute
Approved 25 October 2005
IEEE-SA Standards Board
Abstract:
Excitation system models suitable for use in large-scale system stability studies are
presented. Important limiters and supplementary controls are also included. The model structures
presented are intended to facilitate the use of field test data as a means of obtaining model
parameters. The models are, however, reduced order models and do not represent all of the control
loops on any particular system. The models are valid for frequency deviations of ±5% from rated
frequency and oscillation frequencies up to 3 Hz. These models would not normally be adequate
for use in studies of subsynchronous resonance or other shaft torsional interaction problems.
Delayed protective and control features that may come into play in long term dynamic performance
studies are not represented. A sample set of data for each of the models, for at least one particular
application, is provided.
Keywords:
excitation limiters, excitation systems, power system stability