An efficient methodology for coherency-based dynamic equivalents [power system analysis]

Author

De Souza, E. J S Pires ; Da Silva, A. M Leite

Author_Institution

Dept. of Electr. Eng., Catholic Univ. of Rio de Janeiro, Brazil

Volume

139

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

371

Lastpage

382

Abstract

The authors present a new methodology for dynamic equivalents. Two alternative linear simulation methods are proposed for the identification of coherent generators. The measure of coherency for both methods is the angular speed average deviation of generators. The coherent generators are grouped using a clustering algorithm that assures the uniqueness of the composed coherent groups. The REI approach is applied to transfer the generators of each group to a common busbar. The Levenberg-Marquardt method is used for the coherent generator dynamic aggregation. The dynamic equivalents are evaluated in the New England system and in a configuration of the Brazilian South-Southeastern system with 421 busbars, 717 transmission lines/transformers and 40 generators

Keywords

busbars; digital simulation; electric generators; power system analysis computing; power transformers; power transmission lines; Levenberg-Marquardt method; REI approach; busbar; clustering algorithm; coherency; dynamic equivalents; generators; linear simulation; power system analysis computing; power transformers; transmission lines;

fLanguage

English

Journal_Title

Generation, Transmission and Distribution, IEE Proceedings C

Publisher

iet

ISSN

0143-7046

Type

jour

Filename

156782