Estimação dos parâmetros da máquina síncrona e seu sistema de excitação / Estimation of the parameter of synchronous machine and its excitation system

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

In this work a methodology to estimate parameters of synchronous machines and their excitation system based on trajectory sensitivity technique and system synchronization is proposed. Many methodologies for parameter estimation have been proposed in the literature, each one with advantages and desadvantages. However, only some of them are adequate to estimate parameters with generator in operation (on-line). The trajectory sensitivity methodology has been chosen as it allows a complete representation of generator and excitation system including non-linearities as, for instance, the limits of excitation system and saturation of generator. Some alternatives were proposed for this technique regarding a future on-line application. Among them, the use of synchronization theories in parameter estimation process is highlighted. The methodology developed is used to estimate the parameters of generators (classical model, one-axis model and two axis-model). Some problems to simultaneously estimate several parameters of a synchronous machine are also presented. The methodology is successfully used to estimate the parameters of the excitation system (type ST1A and DC1). Finally, the influence of the estimated parameters on transient stability is analyzed. For this aim, stability tests were performed in a small power system with uncertain parameters

ASSUNTO(S)

parameter estimation trajectory sensitivity estimação de parâmetros sensibilidade de trajetória synchronous machine máquina síncrona excitation system sistema de excitação

ACESSO AO ARTIGO

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