A new hybrid controller for superconducting machine in a SMIB power system

In previous works, we have employed in both excitation and turbine governor systems a conventional coordinated exciter-governor stabilizer (EGPSS) and a coordinated fuzzy logic controller (FLCEG) for improving stability of a Single Machine Infinite-Bus power system (SMIB). This paper describes a new hybrid controller for superconducting machine, that we have denoted (FLC+PSS)EG, based on simultaneous implementation of conventional (EGPSS) and fuzzy (FLCEG) stabilizers. Obtained results, by nonlinear simulation of a SMIB power system containing superconducting machine, prove the effectiveness of adding fuzzy logic and conventional stabilizers in excitation and governor systems (FLC+PSS)EG for large and small disturbances. To show the robustness of the proposed hybrid stabilizer (FLC+PSS)EG, we have compared the obtained results with those of other cases: EGPSS and FLCEG for the two types of disturbances.