A Comparative Study Using Simulated Annealing and Fast Output Sampling Feedback Technique based PSS Design for Single machine Infinite bus System Modeling

The objective of the Power System Stabilizer (PSS) is added to excitation system to enhance the damping during low frequency oscillations. This paper presents a comparison study of Simulated Annealing and fast output sampling based power system stabilizer (PSS) for stability enhancement. Conventional Power system stabilizers (CPSSs) are designed with the phase compensation technique in the frequency domain and include the lead-lag blocks and related parameters are tuned using an optimization method based on Simulated Annealing (SA). The performance of SA-PSS is evaluated at single-machine infinite bus system. In fast output sampling technique, the nonlinear model of single-machine infinite bus system is linearized at different operating point and a linear model is obtained. For this model, a common state feedback gain is obtained using LMI technique. A robust fast output sampling feedback gain which realizes output injection gain is obtained using LMI approach. This method does not require states of the system for feedback and is easily implementable. This robust fast output sampling control is applied to non-linear model of a single machine system at different operating (equilibrium) points. The simulation results clearly indicate the effectiveness and validity of the fast output sampling technique method. Keywords-SMIB system, power system stabilizer, fast output sampling feedback, Simulated Annealing (SA).