Robust control of End order deadbeat current controller considering calculation time delay for UPS inverter

연산시간지연을 고려한 UPS 인버터용 2차 데드비트 전류 제어기의 강인 제어

Deadbeat technique has been proposed as a digital controller for an UPS inverter to achieve the fast response to a load variation and to conserve a very low THD under a nonlinear load condition. This scheme contains a fatal drawback, sensitivity against parameter variation and calculation time delay. This paper proposes a second order deadbeat current controller, which fundamentally solves the calculation time delay problem and certainly guarantees the robustness of the parameter's variation. This is shown theoretically and practically through simulation and experiment.