Exact linearization for advanced reactive power compensators

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 regulation of the voltage of the power systems by compensating reactive power with high transient performance. The design of the control system is based upon the “differential geometry technique”. Such a control system enables global linearization of the compensation system, including the power system and the self-commutated inverter, and thus helps to improve the transient performance of the global power system. The system is simulated using simplified models as well as more sophisticated models for inverters in order to validate the robustness of these controllers