In this paper, the application of the fuzzy logic based power systems stabilizer (FLPSS) to damp power system oscillation is presented. Various types of fuzzy logic controller are used to replace the conventional power system stabilizer (CPSS). The classic fuzzy logic controller based PSS (FLCPSS), the polar FLC (PFLCPSS) and the interval type-2 fuzzy logic controller based PSS (IT2FLCPSS) are applied to the New England - New York interconnected power system and the obtained results are compared. For coordination purposes, genetic algorithm (GA) is used to tune the FLCPSS’s gains. The non-linear simulation in the presence of noise confirms the robustness and the superiority of the IT2FLCPSS.

this article is to study the static stability of Tunisian electrical network face to many current technical constraints to maintain the security of the entire system power. In this context, we present a study based on the modal analysis of the linearized system. This study allows us to determine the optimum location of power regulators PSS iniected at the input of voltage regulator A VR based on a matrix called "participation". The regulators method residues perform the calculation of these parameters.K�ord5-the static stability of Tunisian electrical network, PSS, A VR, method residues.

This paper proposes the static stability of Tunisian electrical network while facing small perturbation to maintain the security of the entire power system. In this context, after linearizing the power system, the concept of determining the placement of Power System Stabilizer is based on participation factor to find where it is going to be the most effective on a particular mode. Then, the Power System Stabilizer tuning is calculated by using the method of residue. Our objective is to improve the dynamic behavior of the electricity grid while facing various small disturbances.