Finite Control Set Model Predictive Control Applied to Multilevel Hybrid Active Power Filter

This article provides a novel control strategy for a single-phase multilevel hybrid active power filter (HAPF) with LCL-filter coupling applied for reactive power compensation and harmonics mitigation with finite control set mode predictive control (FCS-MPC). The proposed strategy was designed aiming to reduce the control complexity and computational burden, which is important when considering the application of FCS-MPC to multilevel converters. The proposed method avoids the application of cascaded controllers in the current control loop, considering only the system model for the calculation of the references. Tests performed in a 7.5 kVA laboratory prototype demonstrate the technique capability to maintain unity power factor at the source, keep the source current within THD standards and reduce the computational time in almost 30% when compared to the application of cascaded controllers in the current reference calculation.