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In the present work, dynamic stability analysis of power system is investigated using conventional phase lead-lag power system stabilizer (CPSS) for multimachine power system with and without considering governor-turbine (G-T) dynamics. Parameters of CPSS are optimized by minimizing an objective function using simulated annealing algorithm (SA). Analysis reveals that there is a need to consider the G-T dynamics for dynamic stability analysis and CPSS gives better dynamic performances as compared to that of without PSS. Attempt is also made to examine whether gain and parameter settings of CPSS obtained at a particular operating condition works well or not to all other operating conditions. Analysis also reveals that the proposed CPSS works satisfactorily following a transitory three-phase fault.


Multimachine System, G-T Dynamics, CPSS, Simulated Annealing (SA) Algorithm.
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