《IEEE Transactions on Energy Conversion》
On-Line Measurement Based Model Parameter Estimation for Synchronous Generators: Model Development and Identification Schemes
作者:
CT Huang，YT Chen，CL Chang，CY Huang，HD Chiang
关键词:
power transmission and distribution；electric generators；mathematical models；control equipment；electrical transients；on-line measurement systems；parametric analysis；reliability；equipment；on-line systems
摘要:
Accurate generator modeling allows for more precise calculations of power system control and stability limits. In this paper, a procedure using a set of measured data from an on-line plant transient recording and analysis (PTRA) system to develop the synchronous generator model for the Taipower system is described. A continuous-time transfer-function matrix is derived for a popular sixth-order synchronous generator model. In order to accommodate the nature of on-line digital measurements, the transfer-function matrix is transformed into a simple discrete-time linear regression model. A measure of discrepancy between the generator model outputs and the on-line measurements from generators is employed. A modified conjugate gradient method suitable for identifying generator parameters is developed to minimize the measure of discrepancy, from which a set of accurate generator parameter values can be obtained. The merits of the modified conjugate gradient method include its computational efficiency and numerical reliability. The proposed procedure allows simultaneous estimation of all generator parameter values. A detailed algorithm and numerical studies are reported in a companion
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