Simple FCS-MPC Method for Reducing Common-Mode Voltage in a Three-Phase Two-Level Voltage Source Inverter

¹ Laboratory of Development of Electrical Drives (LDEE), Automatic department, Faculty of electrical engineering, University of Science and Technology of Oran “Mohamed BOUDIAF”, Algeria
² Laboratory of Automation, Vision, and Intelligent Control system (AVCIS), Automatic department, Faculty of electrical engineering, University of Science and Technology of Oran “Mohamed BOUDIAF”, Algeria

^* Corresponding author: fatima.aziz48@yahoo.fr

Abstract

Common mode voltage (CMV) causes various issues, including a negative impact on the performance of a hybrid electric vehicle’s power system (HEV). Many papers have published methods that mitigate CMV, almost all of which attempt to avoid zero vectors, but this increases total harmonic distortion (THD). This work describes a simple and efficient method for reducing CMV in a two-level three-phase voltage source inverter (VSI) with an RL load. This method uses only active vectors. It replace the zero vector with the two opposite vectors V₂ and V₅. for T₁ and T₂ respectively in a one sampling period T_s. A numerical simulation, using Matlab-Simulink. is achieved to assess the effectiveness of the proposed control technique. The obtained results show a reduction in THD value (17% improvement) and a decrease in the peak value of CMV from (${{ + {V_{dc}}} \over 2}$+Vdc2 and ${{ - {V_{dc}}} \over 6}$−Vdc6) to $\pm {{{V_{dc}}} \over 6}$±Vdc6. These results are compared to those obtained by using the traditional predictive control model MPC.