A new modification in structure of one-cycle controller

Main feature of one-cycle control method is its real time ability to reject line disturbance. Despite of this great feature it has not good load rejection ability and fast command tracking. It is possible to use another controller as auxiliary controller to improve the performances of one-cycle controller. In this paper, an error dependent controller, which uses output error as measure to select reference value for one-cycle controller, has been proposed. When the error is big and positive it selects a pseudo reference bigger than actual reference and when it is big and negative it selects a pseudo reference smaller than actual reference. By this method, the one-cycle controller performance has been improved greatly.