Study on Dynamic Matrix predictive control of single-phase DVR

In this paper, we introduce a dynamic matrix control algorithm in the design of DVR control system, to optimize the control object of output inverter. First of all, analysis has been made on the DVR output voltage under the input voltage of power network and inverter, according to the system model of DVR. The corresponding step function has been deduced, and the output predictive model of DVR has been established consequently. Based on it, the optimized inverter output could be calculated by means of the dynamic matrix control algorithm, combined with the expected output voltage curve calculated by certain compensation strategy. Thus the realtime output instruction of inverter could be acquired, and the improved DVR control system with feed-forward and feed-back functions has been established. Experiment of single-phase DVR voltage compensation has been carried out, based on the above improved algorithm. The results have shown that the speediness and compensation precision have been improved compared with prevenient algorithm, thus verify the feasibility of the algorithm.