Computer models for representation of digital-based excitation systems

Computer models suitable for representation of newer digital-based excitation systems in transient stability programs are presented in this paper. These models are an addendum to the most recent issued IEEE standard 421.5 (1992) for recommended excitation system models. It is the intent of the subcommittee to include these models in standard 421.5 at the time of its next revision. This paper covers, static excitation systems and alternator supplied rectifier excitation sytems.