A study on damping control method for three-phase-to-single-phase matrix converter system with neutral line

A control method of a Matrix Converter to convert from four-wired three-phase voltages to three-wired single-phase voltages (single-phase MC) which replaces transformer in consumer side on micro-grid has been found [1]. In the single-phase MC, voltage drop and phase shift in its load voltage occur because the line current flows due to the input and output filters. So we proposed the load voltage control method for the single-phase MC [2] [3] to compensate them to supply symmetrical two-phase AC load voltages for consumer side. However, when the output load changed to no-load, the output side of the single-phase MC became only LC filter left and resonance was caused but it could not be suppressed by the conventional load voltage control. So we should propose a new method to suppress it. In this paper a damping control method for the single-phase MC is proposed, and the effectiveness of the proposed method is verified by simulation results.