Control of seven-to-three phase Direct Matrix Converter using Model Predictive control for multiphase wind generation

Abstract

The power conversion from variable AC voltage into a desired AC voltage with fixed magnitude and fixed frequency is attracting more attention especially in case of grid-connected wind generation system. Indeed, the Direct Matrix Converter (DMC) can be used as a suitable solution for such AC/AC conversion to fulfill the requirement of the output voltage with desired magnitude and frequency. This paper introduce Model Predictive control for multiphase, more than three phases, seven-to-three Direct Matrix Converter (DMC). This system is a step towards using multiphase generation, especially in wind generation. Seven-to-three direct matrix converter is used to convert seven-phase input to three phase output. Model predictive control is used in this paper control the three phase output current injected into the grid to be sinusoidal and in phase with the grid voltage. Current injected into the grid has a very low Total Harmonic Distortion (THD). The proposed system is simulated using MatLab/Simulink Simulation to verify its operation.