Model-predictive current control of DC/AC inverters with time delay compensation

This paper presents a model-predictive current control (MPCC) method with time delay compensation for three-phase DC/AC inverters. In the classical MPCC method, the time delay which influences the control effect is seldom considered. In this paper, the time delay and its influence on the load current are investigated in detail. In order to minimize the influence, a control strategy is proposed to compensate the time delay. The performance of the proposed MPCC with time delay compensation is compared with the classical one both in simulation and experiment. The results demonstrate that the control method with time delay compensation performs very well in reducing current error and total harmonic distortion, especially when the sampling frequency is low.