The new inventions in technology lead to more power consumption by more number of nonlinear loads, which in turn effecting the quality of power transmitted. The power transmitted in a line is needed to be of high quality. The flow of power basically depends on the line impedance, sending end and receiving end voltage magnitudes. Nonlinear loads create harmonic currents which in turn creates system resonance, capacitor overloading, decrease in efficiency, voltage magnitude changes. The simulation results show that FACTS devices improve the system stability; furthermore, the SSSC-based stabilizer provides a better effectiveness on damping power system oscillation.