Simplified Strategy of Three-level Indirect Matrix Converter Based on Space Vector

Abstract

According to the disadvantages of traditional three-level space vector control strategy with the complexity of the selection of switching vector order and the large computational complexity of the algorithm, a simplified space vector control strategy applied to the three-level indirect matrix converter is proposed. On the device, this method adopts a control strategy with no zero vector in the rectification stage to ensure that the input voltage power factor reaches a maximum, the inverter stage uses space vector control strategy of the simplified sector reconstruction to rotate the reference voltage into the first sector. Then reference voltage correction and level-down processing are performed. Compared with the traditional control strategy, this control strategy not only reduces the computational complexity of the algorithm but also eliminates the need to store a large amount of data in advance, and also reduces the harmonic distortion ratio. The simplified space vector control strategy is verified on simulation and an experimental prototype platform is built. The correctness and feasibility of the control strategy are verified on experimental methods.