Synchronous generator third-order model parameter estimation using online experimental data

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Synchronous generator third-order model parameter estimation using online experimental data

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A method to estimate the dynamic parameters of the commonly used third-order d–q model of a synchronous generator, based on measured electrical power, reactive power, terminal voltage, field current, field voltage and rotor angle following a small perturbation of the field voltage, is described. The parameters are estimated from two newly developed nonlinear functions for electrical power and terminal voltage by using a nonlinear least squares (NLS) algorithm. Results of simulation studies and experimental data collected from an 80 MVA, 10.5 kV generator show the efficacy of the proposed method and also reveal that the proposed method is valid for a wide range of operating conditions. For cases where rotor angle is not available, a new method for rotor angle estimation is also proposed.

Inspec keywords: least squares approximations; synchronous generators; reactive power

Other keywords: reactive power; field voltage; measured electrical power; terminal voltage; voltage 10.5 kV; nonlinear least squares algorithm; synchronous generator third-order model parameter estimation; apparent power 80 MVA; field current; online experimental data; rotor angle; nonlinear functions

Subjects: Synchronous machines; Interpolation and function approximation (numerical analysis)

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