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

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2 Author(s)
Pires de Souza, E.J.S. ; Dept. of Electr. Eng., Catholic Univ. of Rio de Janeiro, Brazil ; Leite da Silva, A.M.

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

Published in:

Generation, Transmission and Distribution, IEE Proceedings C  (Volume:139 ,  Issue: 5 )

Date of Publication:

Sep 1992

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