IDENTIFICATION OF SYNCHRONOUS GENERATOR SATURATION MODELS BASED ON ONLINE DIGITAL MEASUREMENTS

Accurate stability analysis requires the precise modelling of machine saturation phenomena. The paper presents a technique suitable for iden tifying several typical machine saturation models. It is shown that th e technique can be used to identify nonlinearities associated with sat uration and cross-magnetising effects. An algorithm is designed to est imate all parameters of the machine models and the associated saturati on functions. Numerical studies on a synchronous generator are include d, using online measured data of the Tai-power system recorded by the plant transient recording and analysis system.