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

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 Ts. 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 (${{ + {V_{dc}}} \over 2}$ and ${{ - {V_{dc}}} \over 6}$) to $\pm {{{V_{dc}}} \over 6}$. These results are compared to those obtained by using the traditional predictive control model MPC.