Computation of turbine-generator subsynchronous torsional modes from measured data using the eigensystem realization algorithm

Author

Sanchez-Gasca, J.J.

Author_Institution

Gen. Electr. Int. Inc., Schenectady, NY, USA

Volume

3

fYear

2001

fDate

2001

Firstpage

1272

Abstract

This paper demonstrates the feasibility of using the system identification method known as the eigensystem realization algorithm (ERA) as a means for computing the subsynchronous torsional modes of turbine-generator sets. Measured data obtained during an out-of-phase synchronization test of a large turbine generator are used to perform the modal computation. Both front and rear standard speeds are used. The results are compared with those obtained using more conventional methods

Keywords

eigenvalues and eigenfunctions; identification; machine theory; subsynchronous resonance; synchronisation; torsion; turbogenerators; vibrations; eigensystem realization algorithm; front standard speed; out-of-phase synchronization test; rear standard speed; subsynchronous torsional modes; system identification method; turbine-generator sets; turbine-generator subsynchronous torsional modes; Band pass filters; Damping; Frequency measurement; Frequency synchronization; Power system analysis computing; Power system measurements; Shafts; Testing; Turbines; Vibrations;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Society Winter Meeting, 2001. IEEE

Conference_Location

Columbus, OH

Print_ISBN

0-7803-6672-7

Type

conf

DOI

10.1109/PESW.2001.917259

Filename

917259