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      • Robust Deadbeat Current Control Method for Three-Phase Voltage-source Active Power Filter

        Katsumi Nishida,Tarck Ahmed,Mutsuo Nakaoka 전력전자학회 2004 JOURNAL OF POWER ELECTRONICS Vol.4 No.2

        This paper is concerned with a deadbeat current control implementation of shunt-type three-phase active power filter (APF) Although the one-dimensional deadbeat control method can attain time-optimal response of APF compensating current, one sampling period is actually required for its settling time This delay is a serious drawback for this control technique To cancel such a delay and one more delay caused by DSP execution time, the desired APF compensating current has to be predicted two sampling periods ahead Therefore an adaptive predictor is adopted for the purpose of both predicting the contiol error of two sampling periods ahead and bringing the robustness to the deadbeat current control system. By adding the adaptive predictor output as an adjustment term to the reference value of half a source voltage period before, settling time is made short in a transient state. On the other hand, in a steady state, THD (total harmonic distortion) of the utility grid side AC source current can be reduced as much as possible, compared to the case that Ideal identification of controlled system could be made

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