Decentralized synergetic control of multimachine systems

This paper utilizes decentralized synergetic control approach to control a multimachine nonlinear electric power system through the excitation subsystem. The interconnection between generators is modeled as a function of the local variables and is considered as external disturbance to each subsystem. The nonlinear decentralized controllers effectively dampen the rotor angle oscillations and regulate the terminal voltages when a fault occurs. Two test systems are used to verify the efficiency of the proposed method against the conventional power system stabilizers: a nine-bus three-machine power system with inductive load, and the typical four machine two — area system. Simulation results are obtained using the Power Analysis Toolbox (PAT).