TAB-PFC model prediction decoupling control method and system

The invention provides a model prediction decoupling control method and system for a TAB-PFC, and the method comprises the steps: periodically carrying out the sampling of an output voltage and an inductive current of an annular bipolar DC power distribution network system at a current moment, and carrying out the calculation to obtain a target output voltage; according to the obtained sampling values of the output voltage and the inductive current, utilizing a pre-constructed annular bipolar DC power distribution network system output voltage prediction model to obtain voltage prediction values under different switch combinations of four half bridges in the TAB-PFC simplified circuit; obtaining cost values corresponding to the different switch combinations by using a pre-constructed cost function according to the voltage predicted values under the different switch combinations; wherein the cost function is constructed based on the voltage predicted value and the target output voltage; and selecting the switc