Abstract – The oscillation control based on power system that replace the conventional automatic voltage regulators for excitation control additional in a multimachine power system is presented in this research. The design is based on equilibrium and decreasing time oscillation each generator, a powerful adaptive critic technique. The feedback variables are completely based on locally measurements from the generators. Simulations on multi machine power system was demonstrated using EDSA for improving dynamic performance and stability of the power grid under large disturbances that influenced oscillation power station.