Research on delay compensation algorithm based on FCS-MPCC for photovoltaic power generation system

Improving the efficiency of photovoltaic power generation and reducing the power loss of photovoltaic power generation are the difficulties and hot spots in the field of photovoltaic power generation. However, different control methods for PV grid-connected inverters will affect the stability of the system operation and thus affect the efficiency of photovoltaic power generation and grid-connected power. Therefore, this paper first introduces a FCS-MPCC algorithm. When calculating the switch state during system operation, the algorithm will have the problem of the delay of switching tube on and off due to excessive calculation amount. After analysis, it is found that when two-step delay compensation algorithm is added during operation, the system will be improved. It can improve the delay effect caused by the large amount of calculation when the system calculates the switch state. In this paper, a two-step time-delay compensation algorithm is used to estimate load currents at k+1 by measuring current i(k) at k+1 and applying switching states. Finally, the corresponding switching states are applied at k+1 ~ k+2.