Employing fuzzy logic in damping power system oscillations using SVC

In this paper a new lead-lag supplementary damping controller is introduced for damping power system oscillations using SVC, which itpsilas gain is controlled with a mamdani type fuzzy logic controller. Here the global signals are used as the input of damping controller, because some of the oscillating modes arenpsilat seen in the local signals. The residue index function method is used to select this input signal. The phase compensation method is used to design the lead-lag controller parameters. To validate this controller, some computer simulations are used on a 4-machine 2-area test system. The results show the effectiveness of applying the fuzzy gain in damping controller.