Active Standard

IEEE 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 ±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 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.

Standards Committee
PE/EDPG - Energy Development & Power Generation
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Status
Active Standard
PAR Approval
2011-11-09
Superseding
421.5-2005
Board Approval
2016-05-15
History
ANSI Approved:
2017-11-02
Published:
2016-08-26

Working Group Details

Society
IEEE Power and Energy Society
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Standards Committee
PE/EDPG - Energy Development & Power Generation
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Working Group
ESCS -WG 421.5 - ESCS - Excitation System Models for Power System Stability Studies Working Group
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IEEE Program Manager
Malia Zaman
Contact
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.

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Standards approved by the IEEE SA Standards Board that are within the 10-year lifecycle.


No Active Standards

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.


421.5-2005

IEEE Recommended Practice for Excitation System Models for Power System Stability Studies

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.

Learn More

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.


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