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.
- Sponsor Committee
- PE/EDPG - Energy Development & Power Generation
Learn More About PE/EDPG - Energy Development & Power Generation - Status
- Superseded Standard
- PAR Approval
- 1997-12-09
- Superseded by
- 421.5-2016
- Superseding
- 421.5-1992
- Board Approval
- 2005-10-25
- History
-
- ANSI Approved:
- 2005-12-29
- Published:
- 2006-04-21
Additional Resources
- Interpretation
- 421.5-2005_interp.pdf
Working Group Details
- Society
- IEEE Power and Energy Society
Learn More About IEEE Power and Energy Society - Sponsor Committee
- PE/EDPG - Energy Development & Power Generation
Learn More About PE/EDPG - Energy Development & Power Generation - Working Group
-
ESCS -WG 421.5 - ESCS - Excitation System Models for Power System Stability Studies Working Group
- IEEE Program Manager
- Vanessa Lalitte
Contact Vanessa Lalitte - Working Group Chair
- Les Hajagos
Other Activities From This Working Group
Current projects that have been authorized by the IEEE SA Standards Board to develop a standard.
P421.5
Recommended Practice for Excitation System Models for Power System Stability Studies
This document provides mathematical models for computer simulation studies of excitation systems and their associated controls for three-phase synchronous generators. The equipment modelled includes the automatic voltage regulator as well as supplementary controls including reactive current compensation, power system stabilizers, and excitation limiters.
Standards approved by the IEEE SA Standards Board that are within the 10-year lifecycle.
421.5-2016
IEEE Recommended Practice for Excitation System Models for Power System Stability Studies
Excitation system and power system stabilizer models suitable for use in large-scale system stability studies are presented. Important excitation 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 necessarily represent all of the control loops of any particular system. The models are valid for frequency deviations of u00b15% 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 behavior. 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.
These standards have been replaced with a revised version of the standard, or by a compilation of the original active standard and all its existing amendments, corrigenda, and errata.
No Superseded Standards
These standards have been removed from active status through a ballot where the standard is made inactive as a consensus decision of a balloting group.
No Inactive-Withdrawn Standards
These standards are removed from active status through an administrative process for standards that have not undergone a revision process within 10 years.
No Inactive-Reserved Standards