FPGA-based fully digital controller for three-phase shunt active filters

This article presents a fully digital controller for a three-phase shunt active filter. The harmonic isolator and the current controller both have been implemented in only one Field Programmable Gate Array (FPGA). This article discusses the design and implementation of digital hybrid modulated hysteresis current controller and multi-variable filters for shunt active filter controlling. Simulation and experimental results based on ‘FPGA in the loop’ prototyping demonstrate the effectiveness of the proposed fully digital controller.