Performance of a three-phase shunt active power filter (SAPF) relies on the capability of the controller to track the reference current. Therefore

designing an accurate current controller is crucial to guarantee satisfactory SAPF operation. This paper presents a model predictive current controller (MPCC) for a low-cost

four-switch

shunt active power filter for power quality improvement. A four-switch

B4

converter topology is adopted as an SAPF

hence offering a simple

robust

and low-cost solution. In addition

to further reduce overall cost

only two interfacing filter inductors

instead of three

are used to eliminate switching current ripple. The proposed SAPF model MPCC is detailed for implementation

where simulation and experimental results validate effectiveness of the proposed control algorithm showing a 20% improvement in total harmonic distortion compared with a conventional hysteresis band current controller.