Abstract

BOTERO, HÉCTOR ANTONIO  and  RAMIREZ, JOSÉ MIGUEL. IDENTIFICATION OF EXCITATION SYSTEMS: DETAILED ANALYSIS OF METHODOLOGY AND RESULTS. Dyna rev.fac.nac.minas [online]. 2008, vol.75, n.156, pp.65-77. ISSN 0012-7353.

This paper presents a detailed description of the methodology and results obtained for the parameters identification of excitation systems models defined in the IEEE standard 421,5, 1992 proposed for stability studies in power systems. The methodology applies parametric identification techniques to the linear dynamic of the excitation system model; for it, a small pseudo random binary signal is applied with the synchronous generator operating off line, which allows to reduce the testing time of the machines in relation to the step or frequency response methods. The remaining parameters for the non-linear components, as signal saturation and magnetic saturation in the exciters, are obtained from simple tests of great signal excursion. The methodology is illustrated in simulation by applying it to the IEEE ST1A model and experimentally to a self-excited digital excitation system, represented with the ST4B IEEE model. The experimental and simulation results show the validity of the proposed methodology, achieving success rates of 96% to 74% in simulation and experimentation.

Keywords : Identification; excitation systems; predictor error; IEEE std 421.5.

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