Model Predictive Control Technique for a Three-Phase Five-Level Active Neutral Point Clamped Flying Capacitor (ANPC-FC) Rectifier

This paper presents a model predictive control (MPC) technique for a three-phase five-level active neutral point clamped flying capacitor (ANPC-FC) rectifier. The proposed control algorithm depends on a single loop control to regulate the DC link voltage, grid currents, and to balance the voltages of the DC side capacitors. This is achieved by incorporating all controlled states into a multi-objective cost function (MOCF), which encompasses the tracking errors of AC currents, DC link voltage, and DC side capacitor voltage balance. The proposed controller is implemented and tested in MATLABI Simulink environment. Investigations are conducted to prove that the proposed MPC successfully meets the control objectives, enabling precise tracking and ability to deal with abnormal grid conditions, including uncertainties, load variations, voltage sags and swells, as well as unbalanced grid voltages.