Synchronous generator model identification and parameter estimation from operating data

A novel technique to estimate and model parameters of a 460-MVA large steam turbine generator from operating data is presented. First, data from small excitation disturbances are used to estimate linear model armature circuit and field winding parameters of the machine. Subsequently, for each set of...

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Bibliographic Details
Published in:IEEE transactions on energy conversion 2003-03, Vol.18 (1), p.121-126
Main Authors: Karayaka, H.B., Keyhani, A., Heydt, G.T., Agrawal, B.L., Selin, D.A.
Format: Article
Language:English
Subjects:
Circuits
Current measurement
Disturbances
Electrical resistance measurement
Estimates
Generators
Machine windings
Mathematical models
Nonlinearity
Parameter estimation
Rotors
Shape
Stators
Steam turbines
Synchronous generators
Voltage
Winding
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Summary:A novel technique to estimate and model parameters of a 460-MVA large steam turbine generator from operating data is presented. First, data from small excitation disturbances are used to estimate linear model armature circuit and field winding parameters of the machine. Subsequently, for each set of steady state operating data, saturable inductances L/sub ds/ and L/sub qs/ are identified and modeled using nonlinear mapping functions-based estimators. Using the estimates of the armature circuit parameters, for each set of disturbance data collected at different operating conditions, the rotor body parameters of the generator are estimated using an output error method (OEM). The developed nonlinear models are validated with measurements not used in the estimation procedure.
ISSN:0885-8969
1558-0059
DOI:10.1109/TEC.2002.808347