Abstract
ABSTRACT In recent years, growing attention has been paid to frequency response techniques for identifying turbogenerator models. A large amount of experimental results provided by frequency response tests carried out on a 107 MVA turbogenerator, is shown in this paper. The direct and quadrature axis transfer functions of the generator are experimentally identified over a frequency range up to 100 Hz; specifically, experimental results obtained from measurements at standstill and with rotating generator are carefully compared in order to investigate rotation effects. Additionally, low order models for use in stability studies are considered; proper parameters are identified by optimal fitting of test data and compared with design values
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