Finite Control Set Model Predictive Current Control with Delay Compensation for Photovoltaic Power Generation System

In this article, a FCS-MPCC control algorithm with delay compensation for photovoltaic grid-connected inverters is proposed. This algorithm can reduce the delay problem caused by the calculation of switching time during the operation of the system through a two-step delay compensation strategy. Improve the delay problem in the algorithm’s running process as much as possible. In this paper, a new delay compensation algorithm is used, that is, the current i(k) measured at k time and the switching state applied to estimate the load current at k+1, and estimate the load current at k+1 to predict the load current at k+2. The corresponding switching state is applied in k+1 and k+2 time.Finally, the proposed algorithm is verified by MATLAB/Simulink simulation software, it is found that the performance of the FCS-MPCC algorithm with delay compensation is better than that of the traditional FCS-MPCC and the algorithm based on feedforward decoupling PI control, The THD is smaller and the power loss is lower.