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This work presents techniques for tuning power system stabilizers (PSS) with focus on the challenges faced by an engineer during the commissioning of a static excitation system of a medium sized hydro generator. The tuning methods discussed in this study are primarily those applicable to the PSS2B stabilizers (IEEE, 2005). Priority is given to circumstances in which the engineer does not have a detailed model of the generator and power system. Computer simulations in the time and frequency domains are presented with didactic purposes throughout the text. The structure of PSS2B is detailed, the function of each parameter is explained. Among the different methods for tuning the PSS2B, two aproaches stand out: the methods based on the comparison of magnitudes in the time domain and the method of phase compensation. The practical results obtained during commissioning of two hydroelectric power plants are presented. The different PSS tuning methods are compared with the aid of these practical results and computer simulations.

Técnicas de ajuste de estabilizadores de sistemas de potência.