Fuzzy logic control at HVDC rectifier for improving the damping performance of AC/DC systems

This paper presents a fuzzy logic controller at HVDC rectifier in AC/DC power systems, which can improve AC/DC power system stability by using A U supplemental control. The results obtained from simulations indicate the improvement in damping of power oscillation in fuzzy control. Compared with the conventional proportional-integral type controller in HVDC system, the fuzzy logic controller is more helpful to restrain oscillation, increase damping and improve the dynamic performance of the AC/DC power systems during disturbance and recovery.