Controller design for advanced reactive power compensators based on input-output linearization

This paper presents a reactive power compensator for electric power systems, which consists essentially of a self commutated inverter and a nonlinear controller. This compensator permits us to regulate voltage of the power systems by compensating reactive power with desired transient performance. The design of control system is based upon the ''Input-Output Linearization Technique''. Such a control system enables us to stablize globally the compensation system and thus helps to improve largely the transient performance of the global system. The system is simulated using simplified models as well as more sophisticated models for inverters in order to validate the controller performance.