Research on Novel Space Vector Modulation Strategy Based on Quasi-Z Source Three-Phase Four-Leg Matrix Converter

Due to the low voltage transmission (no more than 0.866) and weak anti-interference ability of the Four-leg Matrix Converter (4LMC), its application in grid-connected transformation is limited. Therefore, this paper proposes a new modulation strategy of the Four-leg Matrix Converter (4LMC) based on quasi-Z source (QZS). Firstly, the boost principle of QZS-4LMC and three-dimensional space vector modulation strategy are analyzed. Secondly, on the basis of the three-dimensional space vector modulation, the shoot-through zero vector is inserted into the three-dimensional space vector modulation by dividing the shoot-through zero vector into 16 equal parts by using the shoot-through state instead of some zero vectors, so as to obtain a new modulation strategy. Then, the simulation model of QZS-4LMC is built in MATLAB/Simulink to analyze the control strategy. Finally, the experimental results verify the correctness and effectiveness of this new modulation strategy. (c) 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.