Determination of Synchronous Machine Stability Study Constants. Final Report

摘要

The study documented in this final report deals with investigations of test methods for derivation of model parameters and validation of synchronous-machine model structures for use in stability studies. The period of performance was April 1977 to December 1979. Tests and analysis were performed on Potomac Electric Company's Chalk Point Unit No. 3, a General Electric 732,300-kVA, 3600-rpm generator, and on Ontario Hydro's Nanticoke Unit No. 8 a Parsons 588,000-kVA, 3600-rpm unit. The basic conclusions of this work are: (1) load-rejection tests are practical and provide good data for derivation of machine model parameters and for verification of adequacy of model structures; (2) state-of-the-art, second-order model structures for both the d- and q-axis are adequate for the representation of machine flux dynamics in response to stator currents and modifications of the d-axid model are needed to properly represent field-current transients that are affected by rotor iron effects; and (3) improvements in saturation representation seem to offer the greatest potential for gains in machine model accuracy. (ERA citation 05:033591)