Low-operand three-level four-bridge-arm active power filter FCS-MPC control method

The invention provides a low-operand three-level four-bridge-arm active power filter FCS-MPC control method. In order to reduce the prediction operand of a three-level four-bridge-arm active power filter FCS-MPC control system and give consideration to voltage jump limitation and current following control performance, an equivalent reference voltage is obtained by performing equivalent conversion on a harmonic reference current, according to a reference voltage gamma coordinate axis component reference value, a switching sequence set corresponding to an alternative voltage vector is obtained for the first time according to a spatial layering thought, and the switching sequence set corresponding to the alternative voltage vector is screened for the second time in combination with a redundant vector current following performance equivalence principle and a voltage jump limiting principle; and the optimal voltage vector is selected through a cost function on the basis of the principle of optimal voltage followin