In this study, adaptive predictive voltage control of three phase pulse-width modulated voltage source converter for uninterruptible power supply application is investigated. In recent years, predictive control strategies have attracted considerable attention due to their simple concepts and inherent adaptability to digital implementation. In contrast, sensitivity to parameter uncertainties and computational delays can degrade the performance and even end to instability. So in this paper and in order to overcome these problems, an improved predictive control based on the model reference adaptive observer is proposed. Adaptive observer helps compensate the computation and system delays and reduce the system sensitivity to parameter uncertainties. The proposed adaptive observer estimates the system states and disturbance inputs for the one sample ahead. The performance of the proposed method is investigated under various conditions. The simulation results confirm the excellent performance of the proposed technique in steady-state and transient conditions.

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