Study on the space vector modulation strategy of matrix converter under abnormal input condition

Since the matrix converter (MC) has no intermediate DC energy storage link, any disturbance at the input will affect the output. To guarantee the safe and stable operation of MC system, a feed-forward compensation (FFC) strategy for MC operation in abnormal input voltage conditions, including voltage unbalanced, non-sinusoidal and instantaneous drop, is presented in this paper. The drive performance on the Space Vector Modulation (SVM) Strategy of MC under abnormal input voltage conditions is deeply analyzed. It is proved that the unbalance, non-sinusoidal and instantaneous drop of the input voltage can be compensated by real-time adjusting the SVM coefficient of the control system. The output voltage of MC is kept at normal value by compensating the change of virtual DC voltage. Finally, the control strategy is verified by simulation and experiment.