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Subset selection for improved parameter estimation in on-line identification of a synchronous generator

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3 Author(s)
Burth, M. ; Tech. Univ. Berlin, Germany ; Verghese, George C. ; Velez-Reyes, M.

This paper examines subset selection for nonlinear least squares parameter estimation, and applies the methodology to a test system previously studied in the power system literature, involving the on-line identification of a synchronous generator model with many parameters. Subset selection partitions the parameters into well-conditioned and ill-conditioned subsets. We show for the test system that fixing the ill-conditioned parameters to prior estimates (even if these prior estimates are substantially in error), and estimating only the remaining parameters, significantly improves the performance of the estimation algorithm and greatly enhances the quality of the estimated parameters. It is shown that attempts to estimate all of the model parameters, as done in the original work with this test system, can yield extremely unreliable results

Published in:

Power Systems, IEEE Transactions on  (Volume:14 ,  Issue: 1 )

Date of Publication:

Feb 1999

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