A complementary approach to resonant-repetitive controllers for the control of uninterruptible power supplies (UPS)

This paper deals with the control of uninterruptible power supplies via the combination of repetitive and resonant controllers. Combining the controllers is motivated by performance criteria: while the resonant controller is designed to guarantee asymptotic tracking of the reference, a good level of disturbance rejection and dynamic performance is achieved by the repetitive controller. Complementary filters will be used to integrate the controllers so that a simple implementation strategy is devised. A numerical example evidencing the benefits of the proposed approach is presented.