Model Predictive Control of Three-Level Shunt Active Power Filter Connected to a Photovoltaic System

This paper presents a model predictive control (MPC) for a three-level neutral-point clamped (NPC) inverter operating as a shunt active power filter (SAPF) with a photovoltaic (PV) system. In this proposal, the PV system is used to associate three-level NPC inverter for converting the dc voltage to three phase ac voltages by employing MPC. At the same time, The SAPF injects compensation current at the point of common coupling to cancel the current harmonics. In addition, this work introduces a fuzzy logic maximum power point tracking (MPPT) to the DC-DC boost converter for extracting maximum power from the photovoltaic array. The performance of the conventional perturbation and observation (P&O) and fuzzy logic MPPT algorithm is compared. The effectiveness of the proposed strategy has been verified in MATLAB/Simulink simulation platform. From the simulation results, it is found that the developed system provides excellent performance to achieve reference currents tracking, balance in the DC-link capacitor voltage, as consequence a reduction in the harmonics significantly.