Low frequency oscillations cause a disturbance in power system and it is very common. Hence it is important to study and present good solution for it. In the presented piece of work low frequency oscillation issue has been addressed with the help of two different model of power system i.e. with single machine infinite bus system (SMIB) and with multi machine system (MMPS). The first type of model utilizes the Static Synchronous Series Compensator (SSSC) as damping controller and it is then

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... er optimized by the use of Grey Wolf Optimization (GWO) technique. It was analyzed under nominal, light and heavy loading conditions. Then it was simulated in MATLAB and its results were compared with SMIB with no controller and with CPSS based SMIB. In the second type of power system Kundur two area four machine system is considered. Each machine utilizes Power System Stabilizer (PSS) as its damping controller and is being optimized by GWO for better response. It was examined for Inter area mode of oscillation, Local area mode of oscillation & plus change in speed effect was observed for all the machines. The results after simulation of it are compared with MMPS using no controller and with CPSS only.