DocumentCode :
1721011
Title :
Estimation of power system dominant modes
Author :
Cagnano, A. ; De Tuglie, E. ; Torelli, F.
Author_Institution :
Dipt. di Elettrotec. ed Elettron. (DEE), Politec. di Bari, Bari, Italy
fYear :
2009
Firstpage :
1
Lastpage :
7
Abstract :
The aim of this paper is to propose an approach to estimate the nature (damping and frequency) of a dominant mode. The suggested method, based on Prony analysis, aims to directly evaluate dominant modes of electromechanical oscillations. The basic idea is to fit the given oscillation with a fitting function having one mode only whose parameters need to be identified by any identification process. When the transient of the given signal vanishes, modes having high damping attenuate reaching a quasi linear behavior and revealing the dominant mode only. In this sense, the fitting function gains characteristic parameters (damping and frequency) of the dominant mode. For the identification process we suggest a nonlinear analysis approach based on the Lyapunov method applied to the Sensitivity theory. The proposed methodology is tested on the New England 39-bus system.
Keywords :
Lyapunov methods; oscillations; power system stability; power system state estimation; Lyapunov method; New England 39- bus system; Prony analysis; electromechanical oscillations; fitting function; identification process; nonlinear analysis approach; power system dominant modes; quasi linear behavior; sensitivity theory; Damping; Discrete Fourier transforms; Frequency estimation; Lyapunov method; Modal analysis; Power system analysis computing; Power system dynamics; Power system stability; Power systems; Time series analysis; Lyapunov method; Prony analysis; dominant mode; modal analysis;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
PowerTech, 2009 IEEE Bucharest
Conference_Location :
Bucharest
Print_ISBN :
978-1-4244-2234-0
Electronic_ISBN :
978-1-4244-2235-7
Type :
conf
DOI :
10.1109/PTC.2009.5282042
Filename :
5282042
Link To Document :
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