optimization of conventional stabilizers parameter of two machine power system linked by sssc using chsa technique

this paper presents a method for damping of low frequency oscillations (lfo) in a power system. the powersystem contains static synchronous series compensators (sssc) which using a chaotic harmony searchalgorithm (chsa), optimizes the lead-lag damping stabilizer. in fact, the main target of this paper isoptimization of selected gains with the time domain-based objective function, which is solved by chaoticharmony search algorithm. the performance of the proposed two-machine power system equipped with sssc isevaluated under various disturbances and operating conditions and compared to power system stabilizer (pss).the effectiveness of the proposed sssc controller to damp out of oscillations, over a wide range of operatingconditions and variation of system parameters is shown in simulation results and analysis.